./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.3.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_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/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_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/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_4b963f3a-568a-43c6-943e-bad6e3196a82/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 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:09:53,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:09:53,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:09:53,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:09:53,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:09:53,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:09:53,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:09:53,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:09:53,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:09:53,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:09:53,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:09:53,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:09:53,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:09:53,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:09:53,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:09:53,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:09:53,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:09:53,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:09:53,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:09:53,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:09:53,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:09:53,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:09:53,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:09:53,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:09:53,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:09:53,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:09:53,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:09:53,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:09:53,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:09:53,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:09:53,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:09:53,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:09:53,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:09:53,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:09:53,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:09:53,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:09:53,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:09:53,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:09:53,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:09:53,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:09:53,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:09:53,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 08:09:53,238 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:09:53,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:09:53,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:09:53,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:09:53,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:09:53,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:09:53,247 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:09:53,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:09:53,248 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:09:53,248 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 08:09:53,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:09:53,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:09:53,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:09:53,250 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 08:09:53,250 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 08:09:53,250 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 08:09:53,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:09:53,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 08:09:53,251 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:09:53,251 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:09:53,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:09:53,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:09:53,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:09:53,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:09:53,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:09:53,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:09:53,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:09:53,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:09:53,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:09:53,255 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_4b963f3a-568a-43c6-943e-bad6e3196a82/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2021-11-07 08:09:53,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:09:53,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:09:53,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:09:53,547 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:09:53,550 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:09:53,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-11-07 08:09:53,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/data/3afbb2e5f/d3e0a1a81a6d47d4bd9c1b5e02cf7f9f/FLAGbbef17e7a [2021-11-07 08:09:54,257 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:09:54,258 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-11-07 08:09:54,282 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/data/3afbb2e5f/d3e0a1a81a6d47d4bd9c1b5e02cf7f9f/FLAGbbef17e7a [2021-11-07 08:09:54,535 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/data/3afbb2e5f/d3e0a1a81a6d47d4bd9c1b5e02cf7f9f [2021-11-07 08:09:54,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:09:54,541 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 08:09:54,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:09:54,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:09:54,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:09:54,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:09:54" (1/1) ... [2021-11-07 08:09:54,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@104ec374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:54, skipping insertion in model container [2021-11-07 08:09:54,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:09:54" (1/1) ... [2021-11-07 08:09:54,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:09:54,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:09:54,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:09:54,909 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:09:54,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:09:55,027 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:09:55,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:55 WrapperNode [2021-11-07 08:09:55,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:09:55,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:09:55,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:09:55,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:09:55,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:55" (1/1) ... [2021-11-07 08:09:55,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:55" (1/1) ... [2021-11-07 08:09:55,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:55" (1/1) ... [2021-11-07 08:09:55,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:55" (1/1) ... [2021-11-07 08:09:55,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:55" (1/1) ... [2021-11-07 08:09:55,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:55" (1/1) ... [2021-11-07 08:09:55,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:55" (1/1) ... [2021-11-07 08:09:55,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:09:55,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:09:55,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:09:55,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:09:55,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:55" (1/1) ... [2021-11-07 08:09:55,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:09:55,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:55,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:09:55,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:09:55,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 08:09:55,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:09:55,278 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 08:09:55,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 08:09:55,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 08:09:55,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-07 08:09:55,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-07 08:09:55,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-07 08:09:55,281 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-11-07 08:09:55,281 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-11-07 08:09:55,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 08:09:55,282 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 08:09:55,282 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 08:09:55,282 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 08:09:55,283 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 08:09:55,283 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 08:09:55,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:09:55,283 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 08:09:55,283 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 08:09:55,284 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 08:09:55,284 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 08:09:55,284 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 08:09:55,284 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 08:09:55,284 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 08:09:55,284 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 08:09:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 08:09:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 08:09:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 08:09:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 08:09:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 08:09:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 08:09:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 08:09:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 08:09:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 08:09:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 08:09:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-07 08:09:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-07 08:09:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-07 08:09:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 08:09:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 08:09:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 08:09:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 08:09:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 08:09:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 08:09:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 08:09:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 08:09:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 08:09:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 08:09:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 08:09:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 08:09:55,290 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 08:09:55,290 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 08:09:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 08:09:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 08:09:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 08:09:55,292 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 08:09:55,292 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 08:09:55,292 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 08:09:55,292 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 08:09:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 08:09:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 08:09:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 08:09:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 08:09:55,293 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 08:09:55,294 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 08:09:55,294 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 08:09:55,294 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 08:09:55,295 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 08:09:55,296 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 08:09:55,296 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 08:09:55,297 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 08:09:55,297 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 08:09:55,297 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 08:09:55,297 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 08:09:55,297 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 08:09:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 08:09:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 08:09:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 08:09:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 08:09:55,298 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 08:09:55,299 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 08:09:55,299 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 08:09:55,300 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 08:09:55,300 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 08:09:55,300 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 08:09:55,300 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 08:09:55,300 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 08:09:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 08:09:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 08:09:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 08:09:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 08:09:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 08:09:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 08:09:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 08:09:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 08:09:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 08:09:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 08:09:55,302 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 08:09:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 08:09:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 08:09:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 08:09:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 08:09:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 08:09:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 08:09:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 08:09:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 08:09:55,304 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 08:09:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 08:09:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 08:09:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 08:09:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 08:09:55,305 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 08:09:55,306 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 08:09:55,306 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 08:09:55,307 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 08:09:55,307 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 08:09:55,307 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 08:09:55,307 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 08:09:55,307 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 08:09:55,307 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 08:09:55,308 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 08:09:55,308 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 08:09:55,308 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 08:09:55,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 08:09:55,308 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-11-07 08:09:55,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:09:55,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:09:55,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:09:55,310 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-11-07 08:09:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:09:55,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:09:55,313 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 08:09:55,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:09:55,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 08:09:55,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:09:55,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:09:55,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:09:55,920 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-07 08:09:55,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:55 BoogieIcfgContainer [2021-11-07 08:09:55,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:09:55,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:09:55,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:09:55,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:09:55,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:09:54" (1/3) ... [2021-11-07 08:09:55,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206e8ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:09:55, skipping insertion in model container [2021-11-07 08:09:55,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:09:55" (2/3) ... [2021-11-07 08:09:55,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206e8ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:09:55, skipping insertion in model container [2021-11-07 08:09:55,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:55" (3/3) ... [2021-11-07 08:09:55,931 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-11-07 08:09:55,936 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:09:55,937 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-07 08:09:55,982 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:09:55,988 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 08:09:55,988 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-07 08:09:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 08:09:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:09:56,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:56,009 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:56,009 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:09:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1846299228, now seen corresponding path program 1 times [2021-11-07 08:09:56,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:56,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676815266] [2021-11-07 08:09:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:56,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:56,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:56,325 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 08:09:56,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:56,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676815266] [2021-11-07 08:09:56,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676815266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:56,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:56,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:56,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264724581] [2021-11-07 08:09:56,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:09:56,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:56,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:09:56,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:09:56,363 INFO L87 Difference]: Start difference. First operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) 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 08:09:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:56,649 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-11-07 08:09:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:09:56,650 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 08:09:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:56,666 INFO L225 Difference]: With dead ends: 92 [2021-11-07 08:09:56,666 INFO L226 Difference]: Without dead ends: 89 [2021-11-07 08:09:56,669 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 08:09:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-07 08:09:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-11-07 08:09:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 65 states have internal predecessors, (81), 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 08:09:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-11-07 08:09:56,717 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 8 [2021-11-07 08:09:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:56,718 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-11-07 08:09:56,718 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 08:09:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-11-07 08:09:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:09:56,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:56,719 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:56,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:09:56,720 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:09:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:56,722 INFO L85 PathProgramCache]: Analyzing trace with hash 451849005, now seen corresponding path program 1 times [2021-11-07 08:09:56,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:56,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186475358] [2021-11-07 08:09:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:56,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:56,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:56,913 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 08:09:56,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:56,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186475358] [2021-11-07 08:09:56,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186475358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:56,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:56,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:09:56,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836139012] [2021-11-07 08:09:56,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:56,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:56,917 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 08:09:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:57,220 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2021-11-07 08:09:57,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:09:57,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2021-11-07 08:09:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:57,225 INFO L225 Difference]: With dead ends: 91 [2021-11-07 08:09:57,226 INFO L226 Difference]: Without dead ends: 91 [2021-11-07 08:09:57,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-07 08:09:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-11-07 08:09:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 66 states have internal predecessors, (82), 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 08:09:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-11-07 08:09:57,247 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 10 [2021-11-07 08:09:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:57,248 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-11-07 08:09:57,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 08:09:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-11-07 08:09:57,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:09:57,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:57,250 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:57,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:09:57,250 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:09:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash 451908587, now seen corresponding path program 1 times [2021-11-07 08:09:57,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:57,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065732396] [2021-11-07 08:09:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:57,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:57,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:57,448 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 08:09:57,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:57,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065732396] [2021-11-07 08:09:57,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065732396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:57,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:57,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:57,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012514509] [2021-11-07 08:09:57,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:57,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:57,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:57,456 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:57,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:57,759 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-11-07 08:09:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:09:57,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-07 08:09:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:57,766 INFO L225 Difference]: With dead ends: 135 [2021-11-07 08:09:57,766 INFO L226 Difference]: Without dead ends: 135 [2021-11-07 08:09:57,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-07 08:09:57,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 108. [2021-11-07 08:09:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 99 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 08:09:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-11-07 08:09:57,789 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 10 [2021-11-07 08:09:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:57,790 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-11-07 08:09:57,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:09:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-11-07 08:09:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:09:57,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:57,792 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:57,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:09:57,792 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:09:57,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:57,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1124262917, now seen corresponding path program 1 times [2021-11-07 08:09:57,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:57,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749337431] [2021-11-07 08:09:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:57,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:57,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:57,912 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 08:09:57,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:57,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749337431] [2021-11-07 08:09:57,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749337431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:57,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:57,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:57,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412795175] [2021-11-07 08:09:57,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:57,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:57,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:57,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:57,920 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (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 08:09:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:58,129 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2021-11-07 08:09:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:09:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (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 11 [2021-11-07 08:09:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:58,132 INFO L225 Difference]: With dead ends: 149 [2021-11-07 08:09:58,133 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 08:09:58,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:09:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 08:09:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2021-11-07 08:09:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.7752808988764044) internal successors, (158), 115 states have internal predecessors, (158), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-07 08:09:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-11-07 08:09:58,156 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 11 [2021-11-07 08:09:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:58,156 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-11-07 08:09:58,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (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 08:09:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-11-07 08:09:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:09:58,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:58,157 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:58,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:09:58,157 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:09:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:58,161 INFO L85 PathProgramCache]: Analyzing trace with hash 649350680, now seen corresponding path program 1 times [2021-11-07 08:09:58,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:58,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988365509] [2021-11-07 08:09:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:58,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:58,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:58,307 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 08:09:58,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:58,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988365509] [2021-11-07 08:09:58,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988365509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:58,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:58,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:09:58,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486212404] [2021-11-07 08:09:58,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:09:58,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:58,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:09:58,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:58,319 INFO L87 Difference]: Start difference. First operand 126 states and 183 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 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 08:09:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:58,758 INFO L93 Difference]: Finished difference Result 197 states and 286 transitions. [2021-11-07 08:09:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:09:58,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 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 13 [2021-11-07 08:09:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:58,764 INFO L225 Difference]: With dead ends: 197 [2021-11-07 08:09:58,765 INFO L226 Difference]: Without dead ends: 197 [2021-11-07 08:09:58,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:09:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-07 08:09:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 166. [2021-11-07 08:09:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 125 states have (on average 1.752) internal successors, (219), 151 states have internal predecessors, (219), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (20), 7 states have call predecessors, (20), 11 states have call successors, (20) [2021-11-07 08:09:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 251 transitions. [2021-11-07 08:09:58,783 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 251 transitions. Word has length 13 [2021-11-07 08:09:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:58,784 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 251 transitions. [2021-11-07 08:09:58,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 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 08:09:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 251 transitions. [2021-11-07 08:09:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:09:58,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:58,785 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:58,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:09:58,785 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:09:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:58,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1870609254, now seen corresponding path program 1 times [2021-11-07 08:09:58,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:58,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313277808] [2021-11-07 08:09:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:58,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:58,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:58,881 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 08:09:58,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:58,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313277808] [2021-11-07 08:09:58,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313277808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:58,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:58,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:58,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780227612] [2021-11-07 08:09:58,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:58,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:58,886 INFO L87 Difference]: Start difference. First operand 166 states and 251 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 08:09:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:59,223 INFO L93 Difference]: Finished difference Result 260 states and 393 transitions. [2021-11-07 08:09:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:09:59,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2021-11-07 08:09:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:59,226 INFO L225 Difference]: With dead ends: 260 [2021-11-07 08:09:59,227 INFO L226 Difference]: Without dead ends: 260 [2021-11-07 08:09:59,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-07 08:09:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 233. [2021-11-07 08:09:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 186 states have (on average 1.7258064516129032) internal successors, (321), 212 states have internal predecessors, (321), 16 states have call successors, (16), 12 states have call predecessors, (16), 13 states have return successors, (29), 9 states have call predecessors, (29), 15 states have call successors, (29) [2021-11-07 08:09:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 366 transitions. [2021-11-07 08:09:59,242 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 366 transitions. Word has length 13 [2021-11-07 08:09:59,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:59,242 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 366 transitions. [2021-11-07 08:09:59,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 08:09:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 366 transitions. [2021-11-07 08:09:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:09:59,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:59,244 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:59,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:09:59,244 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:09:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1870609253, now seen corresponding path program 1 times [2021-11-07 08:09:59,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:59,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113640406] [2021-11-07 08:09:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:59,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:59,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:59,342 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 08:09:59,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:59,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113640406] [2021-11-07 08:09:59,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113640406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:59,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:59,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:09:59,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940907238] [2021-11-07 08:09:59,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:09:59,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:59,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:09:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:09:59,349 INFO L87 Difference]: Start difference. First operand 233 states and 366 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 08:09:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:59,684 INFO L93 Difference]: Finished difference Result 311 states and 476 transitions. [2021-11-07 08:09:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:09:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2021-11-07 08:09:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:59,689 INFO L225 Difference]: With dead ends: 311 [2021-11-07 08:09:59,689 INFO L226 Difference]: Without dead ends: 311 [2021-11-07 08:09:59,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-07 08:09:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 287. [2021-11-07 08:09:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 238 states have (on average 1.7016806722689075) internal successors, (405), 262 states have internal predecessors, (405), 16 states have call successors, (16), 16 states have call predecessors, (16), 17 states have return successors, (29), 9 states have call predecessors, (29), 15 states have call successors, (29) [2021-11-07 08:09:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 450 transitions. [2021-11-07 08:09:59,703 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 450 transitions. Word has length 13 [2021-11-07 08:09:59,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:59,703 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 450 transitions. [2021-11-07 08:09:59,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 08:09:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 450 transitions. [2021-11-07 08:09:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:09:59,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:59,705 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:59,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:09:59,705 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:09:59,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2140662271, now seen corresponding path program 1 times [2021-11-07 08:09:59,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:59,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284944042] [2021-11-07 08:09:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:59,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:59,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:09:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:59,828 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 08:09:59,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:59,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284944042] [2021-11-07 08:09:59,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284944042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:09:59,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:09:59,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:09:59,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921976038] [2021-11-07 08:09:59,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:09:59,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:09:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:09:59,832 INFO L87 Difference]: Start difference. First operand 287 states and 450 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 08:10:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:00,052 INFO L93 Difference]: Finished difference Result 275 states and 400 transitions. [2021-11-07 08:10:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:10:00,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2021-11-07 08:10:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:00,055 INFO L225 Difference]: With dead ends: 275 [2021-11-07 08:10:00,056 INFO L226 Difference]: Without dead ends: 275 [2021-11-07 08:10:00,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:10:00,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-07 08:10:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 238. [2021-11-07 08:10:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 197 states have (on average 1.649746192893401) internal successors, (325), 215 states have internal predecessors, (325), 14 states have call successors, (14), 14 states have call predecessors, (14), 15 states have return successors, (23), 9 states have call predecessors, (23), 13 states have call successors, (23) [2021-11-07 08:10:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 362 transitions. [2021-11-07 08:10:00,071 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 362 transitions. Word has length 14 [2021-11-07 08:10:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:00,072 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 362 transitions. [2021-11-07 08:10:00,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 08:10:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 362 transitions. [2021-11-07 08:10:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 08:10:00,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:00,075 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:00,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:10:00,075 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:00,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:00,076 INFO L85 PathProgramCache]: Analyzing trace with hash 406451957, now seen corresponding path program 1 times [2021-11-07 08:10:00,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:00,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451973723] [2021-11-07 08:10:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:00,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:00,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:00,193 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 08:10:00,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:00,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451973723] [2021-11-07 08:10:00,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451973723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:10:00,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:10:00,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:10:00,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790412346] [2021-11-07 08:10:00,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:10:00,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:10:00,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:10:00,196 INFO L87 Difference]: Start difference. First operand 238 states and 362 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 08:10:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:00,438 INFO L93 Difference]: Finished difference Result 439 states and 619 transitions. [2021-11-07 08:10:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:10:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 08:10:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:00,445 INFO L225 Difference]: With dead ends: 439 [2021-11-07 08:10:00,445 INFO L226 Difference]: Without dead ends: 439 [2021-11-07 08:10:00,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 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 08:10:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-07 08:10:00,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 409. [2021-11-07 08:10:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 334 states have (on average 1.5089820359281436) internal successors, (504), 366 states have internal predecessors, (504), 26 states have call successors, (26), 26 states have call predecessors, (26), 37 states have return successors, (55), 17 states have call predecessors, (55), 25 states have call successors, (55) [2021-11-07 08:10:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 585 transitions. [2021-11-07 08:10:00,506 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 585 transitions. Word has length 15 [2021-11-07 08:10:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:00,525 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 585 transitions. [2021-11-07 08:10:00,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 08:10:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 585 transitions. [2021-11-07 08:10:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:10:00,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:00,526 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:00,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:10:00,526 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:00,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1475656894, now seen corresponding path program 1 times [2021-11-07 08:10:00,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:00,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613678066] [2021-11-07 08:10:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:00,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:00,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:00,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:00,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:00,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613678066] [2021-11-07 08:10:00,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613678066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:00,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268835045] [2021-11-07 08:10:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:00,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:00,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:00,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:00,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:10:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:00,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:10:00,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:01,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268835045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:01,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:01,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-07 08:10:01,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888976828] [2021-11-07 08:10:01,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:10:01,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:01,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:10:01,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:10:01,053 INFO L87 Difference]: Start difference. First operand 409 states and 585 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:10:01,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:01,945 INFO L93 Difference]: Finished difference Result 491 states and 695 transitions. [2021-11-07 08:10:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:10:01,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2021-11-07 08:10:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:01,951 INFO L225 Difference]: With dead ends: 491 [2021-11-07 08:10:01,951 INFO L226 Difference]: Without dead ends: 491 [2021-11-07 08:10:01,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:10:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-07 08:10:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 425. [2021-11-07 08:10:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 340 states have (on average 1.4764705882352942) internal successors, (502), 382 states have internal predecessors, (502), 26 states have call successors, (26), 26 states have call predecessors, (26), 47 states have return successors, (65), 17 states have call predecessors, (65), 25 states have call successors, (65) [2021-11-07 08:10:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 593 transitions. [2021-11-07 08:10:02,001 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 593 transitions. Word has length 22 [2021-11-07 08:10:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:02,001 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 593 transitions. [2021-11-07 08:10:02,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:10:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 593 transitions. [2021-11-07 08:10:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:10:02,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:02,004 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:02,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:02,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:02,230 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:02,231 INFO L85 PathProgramCache]: Analyzing trace with hash -2086418946, now seen corresponding path program 1 times [2021-11-07 08:10:02,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:02,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551493788] [2021-11-07 08:10:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:02,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:02,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:02,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:02,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:02,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551493788] [2021-11-07 08:10:02,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551493788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:02,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839282272] [2021-11-07 08:10:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:02,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:02,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:02,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:02,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:10:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:02,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:10:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:02,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839282272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:02,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:02,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-11-07 08:10:02,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280165974] [2021-11-07 08:10:02,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:10:02,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:02,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:10:02,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:10:02,720 INFO L87 Difference]: Start difference. First operand 425 states and 593 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:10:03,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:03,544 INFO L93 Difference]: Finished difference Result 739 states and 1008 transitions. [2021-11-07 08:10:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:10:03,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2021-11-07 08:10:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:03,549 INFO L225 Difference]: With dead ends: 739 [2021-11-07 08:10:03,549 INFO L226 Difference]: Without dead ends: 739 [2021-11-07 08:10:03,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:10:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-11-07 08:10:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 642. [2021-11-07 08:10:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 507 states have (on average 1.4260355029585798) internal successors, (723), 579 states have internal predecessors, (723), 38 states have call successors, (38), 38 states have call predecessors, (38), 85 states have return successors, (113), 25 states have call predecessors, (113), 37 states have call successors, (113) [2021-11-07 08:10:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 874 transitions. [2021-11-07 08:10:03,607 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 874 transitions. Word has length 24 [2021-11-07 08:10:03,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:03,608 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 874 transitions. [2021-11-07 08:10:03,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:10:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 874 transitions. [2021-11-07 08:10:03,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 08:10:03,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:03,613 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:03,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:03,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:10:03,838 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:03,839 INFO L85 PathProgramCache]: Analyzing trace with hash -495871717, now seen corresponding path program 1 times [2021-11-07 08:10:03,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:03,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126995400] [2021-11-07 08:10:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:03,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:04,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:04,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:04,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-07 08:10:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:10:04,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:04,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126995400] [2021-11-07 08:10:04,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126995400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:04,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899636790] [2021-11-07 08:10:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:04,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:04,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:04,154 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:04,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:10:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:04,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:10:04,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:04,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899636790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:04,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:04,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-11-07 08:10:04,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115509388] [2021-11-07 08:10:04,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:10:04,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:04,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:10:04,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:10:04,571 INFO L87 Difference]: Start difference. First operand 642 states and 874 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-07 08:10:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:06,098 INFO L93 Difference]: Finished difference Result 2361 states and 3365 transitions. [2021-11-07 08:10:06,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:10:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 35 [2021-11-07 08:10:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:06,118 INFO L225 Difference]: With dead ends: 2361 [2021-11-07 08:10:06,118 INFO L226 Difference]: Without dead ends: 2361 [2021-11-07 08:10:06,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:10:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-11-07 08:10:06,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2015. [2021-11-07 08:10:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 1621 states have (on average 1.4090067859346083) internal successors, (2284), 1816 states have internal predecessors, (2284), 123 states have call successors, (123), 123 states have call predecessors, (123), 259 states have return successors, (388), 76 states have call predecessors, (388), 122 states have call successors, (388) [2021-11-07 08:10:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 2795 transitions. [2021-11-07 08:10:06,219 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 2795 transitions. Word has length 35 [2021-11-07 08:10:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:06,220 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 2795 transitions. [2021-11-07 08:10:06,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-07 08:10:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 2795 transitions. [2021-11-07 08:10:06,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:10:06,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:06,224 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:06,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:06,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:06,438 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:06,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1356372979, now seen corresponding path program 1 times [2021-11-07 08:10:06,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:06,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356384505] [2021-11-07 08:10:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:06,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:06,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:06,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:06,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:10:06,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:06,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356384505] [2021-11-07 08:10:06,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356384505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:06,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656290074] [2021-11-07 08:10:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:06,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:06,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:06,834 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:06,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:10:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:10:07,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:10:07,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656290074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:07,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:07,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-07 08:10:07,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024244148] [2021-11-07 08:10:07,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:10:07,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:07,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:10:07,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:10:07,418 INFO L87 Difference]: Start difference. First operand 2015 states and 2795 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 08:10:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:08,709 INFO L93 Difference]: Finished difference Result 2783 states and 4061 transitions. [2021-11-07 08:10:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:10:08,710 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2021-11-07 08:10:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:08,742 INFO L225 Difference]: With dead ends: 2783 [2021-11-07 08:10:08,743 INFO L226 Difference]: Without dead ends: 2783 [2021-11-07 08:10:08,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:10:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-11-07 08:10:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2472. [2021-11-07 08:10:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 1977 states have (on average 1.4011127971674253) internal successors, (2770), 2227 states have internal predecessors, (2770), 169 states have call successors, (169), 146 states have call predecessors, (169), 314 states have return successors, (533), 99 states have call predecessors, (533), 168 states have call successors, (533) [2021-11-07 08:10:08,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3472 transitions. [2021-11-07 08:10:08,981 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3472 transitions. Word has length 36 [2021-11-07 08:10:08,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:08,981 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 3472 transitions. [2021-11-07 08:10:08,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 08:10:08,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3472 transitions. [2021-11-07 08:10:08,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:10:08,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:08,984 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:09,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:09,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 08:10:09,202 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:09,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1744987825, now seen corresponding path program 1 times [2021-11-07 08:10:09,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:09,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050098437] [2021-11-07 08:10:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:09,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:09,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:09,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:09,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-07 08:10:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:10:09,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:09,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050098437] [2021-11-07 08:10:09,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050098437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:09,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306715361] [2021-11-07 08:10:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:09,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:09,671 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:09,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:10:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:10,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:10:10,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:10:10,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306715361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:10,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:10,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-11-07 08:10:10,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054943470] [2021-11-07 08:10:10,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:10:10,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:10:10,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:10:10,364 INFO L87 Difference]: Start difference. First operand 2472 states and 3472 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:10:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:11,725 INFO L93 Difference]: Finished difference Result 2236 states and 3085 transitions. [2021-11-07 08:10:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:10:11,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-11-07 08:10:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:11,739 INFO L225 Difference]: With dead ends: 2236 [2021-11-07 08:10:11,739 INFO L226 Difference]: Without dead ends: 2120 [2021-11-07 08:10:11,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:10:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-11-07 08:10:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1825. [2021-11-07 08:10:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1447 states have (on average 1.38217000691085) internal successors, (2000), 1634 states have internal predecessors, (2000), 142 states have call successors, (142), 119 states have call predecessors, (142), 224 states have return successors, (364), 72 states have call predecessors, (364), 141 states have call successors, (364) [2021-11-07 08:10:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2506 transitions. [2021-11-07 08:10:11,823 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2506 transitions. Word has length 38 [2021-11-07 08:10:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:11,826 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 2506 transitions. [2021-11-07 08:10:11,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:10:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2506 transitions. [2021-11-07 08:10:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:10:11,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:11,829 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:11,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:12,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:10:12,042 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:12,043 INFO L85 PathProgramCache]: Analyzing trace with hash 421703127, now seen corresponding path program 1 times [2021-11-07 08:10:12,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:12,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422997307] [2021-11-07 08:10:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:12,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:12,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:12,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:12,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:12,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:10:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:10:12,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:12,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422997307] [2021-11-07 08:10:12,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422997307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:12,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478951437] [2021-11-07 08:10:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:12,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:12,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:12,405 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:12,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:10:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:12,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:10:12,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:10:12,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478951437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:12,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:12,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-11-07 08:10:12,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302119493] [2021-11-07 08:10:12,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:10:12,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:12,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:10:12,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:10:12,877 INFO L87 Difference]: Start difference. First operand 1825 states and 2506 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-07 08:10:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:14,036 INFO L93 Difference]: Finished difference Result 3248 states and 4600 transitions. [2021-11-07 08:10:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:10:14,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-11-07 08:10:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:14,061 INFO L225 Difference]: With dead ends: 3248 [2021-11-07 08:10:14,061 INFO L226 Difference]: Without dead ends: 3248 [2021-11-07 08:10:14,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:10:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-11-07 08:10:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2632. [2021-11-07 08:10:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2104 states have (on average 1.3935361216730038) internal successors, (2932), 2372 states have internal predecessors, (2932), 188 states have call successors, (188), 165 states have call predecessors, (188), 328 states have return successors, (488), 95 states have call predecessors, (488), 187 states have call successors, (488) [2021-11-07 08:10:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 3608 transitions. [2021-11-07 08:10:14,206 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 3608 transitions. Word has length 47 [2021-11-07 08:10:14,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:14,206 INFO L470 AbstractCegarLoop]: Abstraction has 2632 states and 3608 transitions. [2021-11-07 08:10:14,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-07 08:10:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 3608 transitions. [2021-11-07 08:10:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:10:14,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:14,209 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:14,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:14,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:14,430 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1681124145, now seen corresponding path program 1 times [2021-11-07 08:10:14,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:14,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063256300] [2021-11-07 08:10:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:14,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:14,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:14,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:14,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:14,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:10:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:14,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-07 08:10:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 08:10:14,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:14,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063256300] [2021-11-07 08:10:14,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063256300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:14,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135188298] [2021-11-07 08:10:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:14,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:14,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:14,672 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:14,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:10:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:14,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:10:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:10:15,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135188298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:15,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:15,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-11-07 08:10:15,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064369709] [2021-11-07 08:10:15,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:10:15,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:10:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:10:15,117 INFO L87 Difference]: Start difference. First operand 2632 states and 3608 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:10:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:15,785 INFO L93 Difference]: Finished difference Result 3687 states and 5274 transitions. [2021-11-07 08:10:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:10:15,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-11-07 08:10:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:15,810 INFO L225 Difference]: With dead ends: 3687 [2021-11-07 08:10:15,810 INFO L226 Difference]: Without dead ends: 3687 [2021-11-07 08:10:15,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:10:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-11-07 08:10:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2678. [2021-11-07 08:10:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2127 states have (on average 1.3892806770098731) internal successors, (2955), 2418 states have internal predecessors, (2955), 188 states have call successors, (188), 165 states have call predecessors, (188), 351 states have return successors, (534), 95 states have call predecessors, (534), 187 states have call successors, (534) [2021-11-07 08:10:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3677 transitions. [2021-11-07 08:10:15,959 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3677 transitions. Word has length 58 [2021-11-07 08:10:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:15,959 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 3677 transitions. [2021-11-07 08:10:15,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:10:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3677 transitions. [2021-11-07 08:10:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:10:15,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:15,962 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:15,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:16,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:16,177 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:16,178 INFO L85 PathProgramCache]: Analyzing trace with hash 57126017, now seen corresponding path program 1 times [2021-11-07 08:10:16,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:16,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842585732] [2021-11-07 08:10:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:16,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:16,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:16,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:16,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:16,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-07 08:10:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:16,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-07 08:10:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:10:16,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:16,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842585732] [2021-11-07 08:10:16,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842585732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:16,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392449656] [2021-11-07 08:10:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:16,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:16,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:16,454 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:16,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:10:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:16,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:10:16,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 08:10:17,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392449656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:17,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:17,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-11-07 08:10:17,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900468225] [2021-11-07 08:10:17,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:10:17,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:17,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:10:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:10:17,068 INFO L87 Difference]: Start difference. First operand 2678 states and 3677 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-07 08:10:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:25,580 INFO L93 Difference]: Finished difference Result 10210 states and 14276 transitions. [2021-11-07 08:10:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-11-07 08:10:25,581 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2021-11-07 08:10:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:25,652 INFO L225 Difference]: With dead ends: 10210 [2021-11-07 08:10:25,652 INFO L226 Difference]: Without dead ends: 10035 [2021-11-07 08:10:25,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10272 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3114, Invalid=23618, Unknown=0, NotChecked=0, Total=26732 [2021-11-07 08:10:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10035 states. [2021-11-07 08:10:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10035 to 8947. [2021-11-07 08:10:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8947 states, 7143 states have (on average 1.360212795744085) internal successors, (9716), 8037 states have internal predecessors, (9716), 670 states have call successors, (670), 573 states have call predecessors, (670), 1123 states have return successors, (2034), 337 states have call predecessors, (2034), 669 states have call successors, (2034) [2021-11-07 08:10:26,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8947 states to 8947 states and 12420 transitions. [2021-11-07 08:10:26,098 INFO L78 Accepts]: Start accepts. Automaton has 8947 states and 12420 transitions. Word has length 60 [2021-11-07 08:10:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:26,099 INFO L470 AbstractCegarLoop]: Abstraction has 8947 states and 12420 transitions. [2021-11-07 08:10:26,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-07 08:10:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 8947 states and 12420 transitions. [2021-11-07 08:10:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:10:26,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:26,103 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:26,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:26,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:10:26,330 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1356938417, now seen corresponding path program 1 times [2021-11-07 08:10:26,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:26,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099373255] [2021-11-07 08:10:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:26,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:26,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:26,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:26,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:26,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:10:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:26,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-07 08:10:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 41 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 08:10:26,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:26,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099373255] [2021-11-07 08:10:26,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099373255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:26,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009203398] [2021-11-07 08:10:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:26,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:26,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:26,544 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:26,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:10:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:10:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:10:27,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009203398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:27,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:27,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-11-07 08:10:27,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660867771] [2021-11-07 08:10:27,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:10:27,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:10:27,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:10:27,107 INFO L87 Difference]: Start difference. First operand 8947 states and 12420 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-07 08:10:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:28,894 INFO L93 Difference]: Finished difference Result 18386 states and 26465 transitions. [2021-11-07 08:10:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 08:10:28,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 60 [2021-11-07 08:10:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:28,976 INFO L225 Difference]: With dead ends: 18386 [2021-11-07 08:10:28,977 INFO L226 Difference]: Without dead ends: 18386 [2021-11-07 08:10:28,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:10:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18386 states. [2021-11-07 08:10:29,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18386 to 14298. [2021-11-07 08:10:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14298 states, 11614 states have (on average 1.3810056827966248) internal successors, (16039), 12898 states have internal predecessors, (16039), 1002 states have call successors, (1002), 897 states have call predecessors, (1002), 1671 states have return successors, (3048), 503 states have call predecessors, (3048), 1001 states have call successors, (3048) [2021-11-07 08:10:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14298 states to 14298 states and 20089 transitions. [2021-11-07 08:10:29,521 INFO L78 Accepts]: Start accepts. Automaton has 14298 states and 20089 transitions. Word has length 60 [2021-11-07 08:10:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:29,523 INFO L470 AbstractCegarLoop]: Abstraction has 14298 states and 20089 transitions. [2021-11-07 08:10:29,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-07 08:10:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 14298 states and 20089 transitions. [2021-11-07 08:10:29,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:10:29,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:29,526 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:29,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:29,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:10:29,742 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:29,743 INFO L85 PathProgramCache]: Analyzing trace with hash 7649356, now seen corresponding path program 1 times [2021-11-07 08:10:29,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:29,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926489658] [2021-11-07 08:10:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:29,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:29,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:29,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:29,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:29,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:10:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:29,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-07 08:10:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:29,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-07 08:10:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:10:29,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:29,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926489658] [2021-11-07 08:10:29,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926489658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:29,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102945026] [2021-11-07 08:10:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:29,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:29,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:29,992 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:30,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:10:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:10:30,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:10:30,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102945026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:30,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:30,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-11-07 08:10:30,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61571328] [2021-11-07 08:10:30,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:10:30,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:10:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:10:30,709 INFO L87 Difference]: Start difference. First operand 14298 states and 20089 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-07 08:10:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:32,673 INFO L93 Difference]: Finished difference Result 18457 states and 26048 transitions. [2021-11-07 08:10:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:10:32,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 71 [2021-11-07 08:10:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:32,735 INFO L225 Difference]: With dead ends: 18457 [2021-11-07 08:10:32,735 INFO L226 Difference]: Without dead ends: 18282 [2021-11-07 08:10:32,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=390, Invalid=1416, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:10:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2021-11-07 08:10:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 17261. [2021-11-07 08:10:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17261 states, 13838 states have (on average 1.3599508599508598) internal successors, (18819), 15533 states have internal predecessors, (18819), 1334 states have call successors, (1334), 1059 states have call predecessors, (1334), 2078 states have return successors, (4228), 669 states have call predecessors, (4228), 1333 states have call successors, (4228) [2021-11-07 08:10:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17261 states to 17261 states and 24381 transitions. [2021-11-07 08:10:33,242 INFO L78 Accepts]: Start accepts. Automaton has 17261 states and 24381 transitions. Word has length 71 [2021-11-07 08:10:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:33,242 INFO L470 AbstractCegarLoop]: Abstraction has 17261 states and 24381 transitions. [2021-11-07 08:10:33,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-07 08:10:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 17261 states and 24381 transitions. [2021-11-07 08:10:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:10:33,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:33,248 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:33,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:33,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:33,474 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:33,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:33,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1516849340, now seen corresponding path program 1 times [2021-11-07 08:10:33,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:33,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413628774] [2021-11-07 08:10:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:33,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:33,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:33,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:33,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:33,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:10:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:33,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-07 08:10:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:33,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-07 08:10:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:33,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-07 08:10:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 82 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-07 08:10:33,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:33,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413628774] [2021-11-07 08:10:33,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413628774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:33,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607832489] [2021-11-07 08:10:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:33,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:33,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:33,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:33,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:10:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:10:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 08:10:34,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607832489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:34,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:34,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-11-07 08:10:34,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775821693] [2021-11-07 08:10:34,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:10:34,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:34,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:10:34,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:10:34,346 INFO L87 Difference]: Start difference. First operand 17261 states and 24381 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-07 08:10:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:35,372 INFO L93 Difference]: Finished difference Result 22712 states and 32588 transitions. [2021-11-07 08:10:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:10:35,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2021-11-07 08:10:35,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:35,447 INFO L225 Difference]: With dead ends: 22712 [2021-11-07 08:10:35,447 INFO L226 Difference]: Without dead ends: 22712 [2021-11-07 08:10:35,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:10:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22712 states. [2021-11-07 08:10:35,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22712 to 17261. [2021-11-07 08:10:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17261 states, 13838 states have (on average 1.3599508599508598) internal successors, (18819), 15533 states have internal predecessors, (18819), 1334 states have call successors, (1334), 1059 states have call predecessors, (1334), 2078 states have return successors, (4228), 669 states have call predecessors, (4228), 1333 states have call successors, (4228) [2021-11-07 08:10:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17261 states to 17261 states and 24381 transitions. [2021-11-07 08:10:36,076 INFO L78 Accepts]: Start accepts. Automaton has 17261 states and 24381 transitions. Word has length 82 [2021-11-07 08:10:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:36,076 INFO L470 AbstractCegarLoop]: Abstraction has 17261 states and 24381 transitions. [2021-11-07 08:10:36,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-07 08:10:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 17261 states and 24381 transitions. [2021-11-07 08:10:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 08:10:36,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:36,085 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:36,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:36,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:36,285 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:36,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:36,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1173694170, now seen corresponding path program 1 times [2021-11-07 08:10:36,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:36,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213099202] [2021-11-07 08:10:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:36,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:36,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:36,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:36,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:36,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:10:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:36,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-07 08:10:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:36,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-07 08:10:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:36,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-07 08:10:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 08:10:36,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:36,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213099202] [2021-11-07 08:10:36,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213099202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:36,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514375544] [2021-11-07 08:10:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:36,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:36,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:36,530 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:36,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:10:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:36,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:10:36,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 48 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 08:10:37,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514375544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:37,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:37,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-07 08:10:37,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326878485] [2021-11-07 08:10:37,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:10:37,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:37,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:10:37,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:10:37,260 INFO L87 Difference]: Start difference. First operand 17261 states and 24381 transitions. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-07 08:10:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:40,178 INFO L93 Difference]: Finished difference Result 27778 states and 39484 transitions. [2021-11-07 08:10:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 08:10:40,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 84 [2021-11-07 08:10:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:40,268 INFO L225 Difference]: With dead ends: 27778 [2021-11-07 08:10:40,269 INFO L226 Difference]: Without dead ends: 26524 [2021-11-07 08:10:40,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 08:10:40,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26524 states. [2021-11-07 08:10:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26524 to 17896. [2021-11-07 08:10:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17896 states, 14358 states have (on average 1.3469146120629614) internal successors, (19339), 16087 states have internal predecessors, (19339), 1334 states have call successors, (1334), 1140 states have call predecessors, (1334), 2193 states have return successors, (4311), 669 states have call predecessors, (4311), 1333 states have call successors, (4311) [2021-11-07 08:10:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17896 states to 17896 states and 24984 transitions. [2021-11-07 08:10:40,830 INFO L78 Accepts]: Start accepts. Automaton has 17896 states and 24984 transitions. Word has length 84 [2021-11-07 08:10:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:40,831 INFO L470 AbstractCegarLoop]: Abstraction has 17896 states and 24984 transitions. [2021-11-07 08:10:40,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-07 08:10:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 17896 states and 24984 transitions. [2021-11-07 08:10:40,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 08:10:40,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:40,835 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 3, 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 08:10:40,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:41,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:41,050 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:41,051 INFO L85 PathProgramCache]: Analyzing trace with hash 57278106, now seen corresponding path program 1 times [2021-11-07 08:10:41,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:41,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119347391] [2021-11-07 08:10:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:41,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:41,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:41,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:41,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:41,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:10:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:41,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-07 08:10:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:41,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-07 08:10:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:41,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-07 08:10:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 70 proven. 29 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-07 08:10:41,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:41,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119347391] [2021-11-07 08:10:41,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119347391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:41,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280083940] [2021-11-07 08:10:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:41,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:41,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:41,547 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:41,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:10:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:41,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:10:42,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 122 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 08:10:42,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280083940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:42,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:42,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-11-07 08:10:42,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076391552] [2021-11-07 08:10:42,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:10:42,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:42,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:10:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:10:42,387 INFO L87 Difference]: Start difference. First operand 17896 states and 24984 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-07 08:10:43,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:43,755 INFO L93 Difference]: Finished difference Result 14807 states and 19651 transitions. [2021-11-07 08:10:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 08:10:43,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 84 [2021-11-07 08:10:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:43,789 INFO L225 Difference]: With dead ends: 14807 [2021-11-07 08:10:43,790 INFO L226 Difference]: Without dead ends: 13835 [2021-11-07 08:10:43,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=2063, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:10:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2021-11-07 08:10:44,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 13300. [2021-11-07 08:10:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13300 states, 10710 states have (on average 1.3072829131652661) internal successors, (14001), 11900 states have internal predecessors, (14001), 1002 states have call successors, (1002), 897 states have call predecessors, (1002), 1577 states have return successors, (2716), 503 states have call predecessors, (2716), 1001 states have call successors, (2716) [2021-11-07 08:10:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13300 states to 13300 states and 17719 transitions. [2021-11-07 08:10:44,087 INFO L78 Accepts]: Start accepts. Automaton has 13300 states and 17719 transitions. Word has length 84 [2021-11-07 08:10:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:44,087 INFO L470 AbstractCegarLoop]: Abstraction has 13300 states and 17719 transitions. [2021-11-07 08:10:44,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-07 08:10:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 13300 states and 17719 transitions. [2021-11-07 08:10:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 08:10:44,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:44,091 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:44,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:44,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:44,314 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:44,314 INFO L85 PathProgramCache]: Analyzing trace with hash -478636956, now seen corresponding path program 1 times [2021-11-07 08:10:44,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:44,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918979997] [2021-11-07 08:10:44,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:44,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:44,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:44,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:44,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:44,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:10:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:44,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-07 08:10:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:44,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-07 08:10:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:44,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-07 08:10:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 38 proven. 67 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-07 08:10:44,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:44,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918979997] [2021-11-07 08:10:44,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918979997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:44,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287858781] [2021-11-07 08:10:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:44,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:44,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:44,574 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:44,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:10:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:45,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 08:10:45,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 49 proven. 65 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-07 08:10:45,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287858781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:45,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:45,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2021-11-07 08:10:45,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444522538] [2021-11-07 08:10:45,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:10:45,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:45,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:10:45,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:10:45,378 INFO L87 Difference]: Start difference. First operand 13300 states and 17719 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-07 08:10:46,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:46,142 INFO L93 Difference]: Finished difference Result 13075 states and 17272 transitions. [2021-11-07 08:10:46,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:10:46,143 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 85 [2021-11-07 08:10:46,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:46,173 INFO L225 Difference]: With dead ends: 13075 [2021-11-07 08:10:46,173 INFO L226 Difference]: Without dead ends: 13075 [2021-11-07 08:10:46,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:10:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13075 states. [2021-11-07 08:10:46,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13075 to 12880. [2021-11-07 08:10:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12880 states, 10360 states have (on average 1.2998069498069498) internal successors, (13466), 11514 states have internal predecessors, (13466), 978 states have call successors, (978), 875 states have call predecessors, (978), 1531 states have return successors, (2628), 491 states have call predecessors, (2628), 977 states have call successors, (2628) [2021-11-07 08:10:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12880 states to 12880 states and 17072 transitions. [2021-11-07 08:10:46,428 INFO L78 Accepts]: Start accepts. Automaton has 12880 states and 17072 transitions. Word has length 85 [2021-11-07 08:10:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:46,429 INFO L470 AbstractCegarLoop]: Abstraction has 12880 states and 17072 transitions. [2021-11-07 08:10:46,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-07 08:10:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 12880 states and 17072 transitions. [2021-11-07 08:10:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 08:10:46,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:46,432 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:46,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:46,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:46,650 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1378069754, now seen corresponding path program 1 times [2021-11-07 08:10:46,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:46,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392368047] [2021-11-07 08:10:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:46,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:46,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:46,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:46,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:10:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:46,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-07 08:10:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:46,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-07 08:10:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:46,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-07 08:10:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 84 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 08:10:46,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:46,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392368047] [2021-11-07 08:10:46,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392368047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:46,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563637362] [2021-11-07 08:10:46,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:46,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:46,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:46,954 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:46,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:10:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:47,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:10:47,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 128 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 08:10:47,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563637362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:47,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:47,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-11-07 08:10:47,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770861902] [2021-11-07 08:10:47,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:10:47,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:47,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:10:47,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:10:47,763 INFO L87 Difference]: Start difference. First operand 12880 states and 17072 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-07 08:10:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:49,155 INFO L93 Difference]: Finished difference Result 20786 states and 27151 transitions. [2021-11-07 08:10:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:10:49,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2021-11-07 08:10:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:49,228 INFO L225 Difference]: With dead ends: 20786 [2021-11-07 08:10:49,228 INFO L226 Difference]: Without dead ends: 19891 [2021-11-07 08:10:49,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=1090, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:10:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19891 states. [2021-11-07 08:10:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19891 to 18204. [2021-11-07 08:10:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18204 states, 14593 states have (on average 1.2843829233193997) internal successors, (18743), 16269 states have internal predecessors, (18743), 1404 states have call successors, (1404), 1214 states have call predecessors, (1404), 2196 states have return successors, (3836), 721 states have call predecessors, (3836), 1403 states have call successors, (3836) [2021-11-07 08:10:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18204 states to 18204 states and 23983 transitions. [2021-11-07 08:10:49,789 INFO L78 Accepts]: Start accepts. Automaton has 18204 states and 23983 transitions. Word has length 86 [2021-11-07 08:10:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:49,789 INFO L470 AbstractCegarLoop]: Abstraction has 18204 states and 23983 transitions. [2021-11-07 08:10:49,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 12 states have internal predecessors, (78), 4 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-07 08:10:49,790 INFO L276 IsEmpty]: Start isEmpty. Operand 18204 states and 23983 transitions. [2021-11-07 08:10:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 08:10:49,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:49,794 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:49,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:50,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:50,022 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -616739140, now seen corresponding path program 1 times [2021-11-07 08:10:50,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:50,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124789844] [2021-11-07 08:10:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:50,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:50,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:50,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:50,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:50,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:10:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:50,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-07 08:10:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:50,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-07 08:10:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:50,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-07 08:10:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 70 proven. 42 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-07 08:10:50,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:50,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124789844] [2021-11-07 08:10:50,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124789844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:50,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624720813] [2021-11-07 08:10:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:50,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:50,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:50,299 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:50,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:10:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 08:10:50,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 108 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 08:10:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624720813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:51,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:51,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-11-07 08:10:51,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974411212] [2021-11-07 08:10:51,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:10:51,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:51,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:10:51,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:10:51,273 INFO L87 Difference]: Start difference. First operand 18204 states and 23983 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-07 08:10:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:53,607 INFO L93 Difference]: Finished difference Result 13417 states and 17122 transitions. [2021-11-07 08:10:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:10:53,608 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 92 [2021-11-07 08:10:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:53,630 INFO L225 Difference]: With dead ends: 13417 [2021-11-07 08:10:53,630 INFO L226 Difference]: Without dead ends: 12804 [2021-11-07 08:10:53,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:10:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12804 states. [2021-11-07 08:10:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12804 to 12620. [2021-11-07 08:10:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12620 states, 10074 states have (on average 1.2790351399642645) internal successors, (12885), 11210 states have internal predecessors, (12885), 988 states have call successors, (988), 899 states have call predecessors, (988), 1547 states have return successors, (2458), 511 states have call predecessors, (2458), 987 states have call successors, (2458) [2021-11-07 08:10:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12620 states to 12620 states and 16331 transitions. [2021-11-07 08:10:53,929 INFO L78 Accepts]: Start accepts. Automaton has 12620 states and 16331 transitions. Word has length 92 [2021-11-07 08:10:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:53,930 INFO L470 AbstractCegarLoop]: Abstraction has 12620 states and 16331 transitions. [2021-11-07 08:10:53,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 15 states have internal predecessors, (93), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-07 08:10:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 12620 states and 16331 transitions. [2021-11-07 08:10:53,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 08:10:53,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:53,935 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:53,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:54,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 08:10:54,154 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:10:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:54,155 INFO L85 PathProgramCache]: Analyzing trace with hash 259058990, now seen corresponding path program 1 times [2021-11-07 08:10:54,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:54,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738126642] [2021-11-07 08:10:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:54,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:54,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:10:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:54,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:10:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:54,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:10:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:54,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:10:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:54,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-07 08:10:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:54,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-07 08:10:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:54,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-07 08:10:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:54,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-07 08:10:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 80 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-07 08:10:54,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:54,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738126642] [2021-11-07 08:10:54,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738126642] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:54,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884793574] [2021-11-07 08:10:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:54,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:54,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:54,506 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:54,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:10:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:54,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 08:10:54,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 108 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-07 08:10:55,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884793574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:55,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:55,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-11-07 08:10:55,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342676368] [2021-11-07 08:10:55,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:10:55,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:55,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:10:55,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:10:55,795 INFO L87 Difference]: Start difference. First operand 12620 states and 16331 transitions. Second operand has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-07 08:11:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:01,689 INFO L93 Difference]: Finished difference Result 21726 states and 27863 transitions. [2021-11-07 08:11:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 08:11:01,689 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 95 [2021-11-07 08:11:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:01,735 INFO L225 Difference]: With dead ends: 21726 [2021-11-07 08:11:01,735 INFO L226 Difference]: Without dead ends: 21592 [2021-11-07 08:11:01,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1246, Invalid=5726, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 08:11:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21592 states. [2021-11-07 08:11:02,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21592 to 20891. [2021-11-07 08:11:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20891 states, 16726 states have (on average 1.2621068994380007) internal successors, (21110), 18565 states have internal predecessors, (21110), 1608 states have call successors, (1608), 1485 states have call predecessors, (1608), 2546 states have return successors, (4151), 841 states have call predecessors, (4151), 1607 states have call successors, (4151) [2021-11-07 08:11:02,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20891 states to 20891 states and 26869 transitions. [2021-11-07 08:11:02,125 INFO L78 Accepts]: Start accepts. Automaton has 20891 states and 26869 transitions. Word has length 95 [2021-11-07 08:11:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:02,126 INFO L470 AbstractCegarLoop]: Abstraction has 20891 states and 26869 transitions. [2021-11-07 08:11:02,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.619047619047619) internal successors, (97), 19 states have internal predecessors, (97), 7 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-07 08:11:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 20891 states and 26869 transitions. [2021-11-07 08:11:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 08:11:02,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:02,132 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 8, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:02,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:02,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 08:11:02,347 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:02,348 INFO L85 PathProgramCache]: Analyzing trace with hash 756702157, now seen corresponding path program 1 times [2021-11-07 08:11:02,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:02,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285639794] [2021-11-07 08:11:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:02,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:02,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:11:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:02,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:11:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:02,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:11:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:02,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:11:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:02,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-07 08:11:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:02,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-07 08:11:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:02,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-07 08:11:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:02,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-07 08:11:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:02,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-07 08:11:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:02,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-07 08:11:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 97 proven. 4 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-07 08:11:02,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:02,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285639794] [2021-11-07 08:11:02,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285639794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:02,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152365368] [2021-11-07 08:11:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:02,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:02,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:02,623 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:02,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:11:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:03,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 08:11:03,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 91 proven. 62 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-07 08:11:03,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152365368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:03,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:03,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-11-07 08:11:03,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344086267] [2021-11-07 08:11:03,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:11:03,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:11:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:11:03,646 INFO L87 Difference]: Start difference. First operand 20891 states and 26869 transitions. Second operand has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-07 08:11:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:05,856 INFO L93 Difference]: Finished difference Result 26244 states and 33478 transitions. [2021-11-07 08:11:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 08:11:05,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 118 [2021-11-07 08:11:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:05,917 INFO L225 Difference]: With dead ends: 26244 [2021-11-07 08:11:05,917 INFO L226 Difference]: Without dead ends: 26082 [2021-11-07 08:11:05,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=490, Invalid=2480, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 08:11:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26082 states. [2021-11-07 08:11:06,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26082 to 25019. [2021-11-07 08:11:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25019 states, 19786 states have (on average 1.2359749317699384) internal successors, (24455), 22050 states have internal predecessors, (24455), 2142 states have call successors, (2142), 1850 states have call predecessors, (2142), 3080 states have return successors, (5385), 1119 states have call predecessors, (5385), 2141 states have call successors, (5385) [2021-11-07 08:11:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25019 states to 25019 states and 31982 transitions. [2021-11-07 08:11:06,355 INFO L78 Accepts]: Start accepts. Automaton has 25019 states and 31982 transitions. Word has length 118 [2021-11-07 08:11:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:06,355 INFO L470 AbstractCegarLoop]: Abstraction has 25019 states and 31982 transitions. [2021-11-07 08:11:06,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 14 states have internal predecessors, (106), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-07 08:11:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 25019 states and 31982 transitions. [2021-11-07 08:11:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 08:11:06,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:06,365 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 9, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:06,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:06,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 08:11:06,590 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:06,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash -607088145, now seen corresponding path program 1 times [2021-11-07 08:11:06,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:06,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045372588] [2021-11-07 08:11:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:06,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:11:06,627 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:11:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:11:06,738 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 08:11:06,739 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:11:06,739 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-11-07 08:11:06,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-11-07 08:11:06,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-11-07 08:11:06,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-11-07 08:11:06,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-11-07 08:11:06,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-11-07 08:11:06,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-11-07 08:11:06,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-11-07 08:11:06,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-11-07 08:11:06,743 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-11-07 08:11:06,743 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-11-07 08:11:06,743 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-11-07 08:11:06,744 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-11-07 08:11:06,744 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-11-07 08:11:06,744 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-11-07 08:11:06,744 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-07 08:11:06,744 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-07 08:11:06,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:11:06,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:11:06,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:11:06,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 08:11:06,749 INFO L731 BasicCegarLoop]: Path program 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 08:11:06,752 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:11:06,807 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-07 08:11:06,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:11:06 BoogieIcfgContainer [2021-11-07 08:11:06,894 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:11:06,901 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:11:06,901 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:11:06,902 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:11:06,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:09:55" (3/4) ... [2021-11-07 08:11:06,905 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 08:11:06,906 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:11:06,907 INFO L168 Benchmark]: Toolchain (without parser) took 72364.84 ms. Allocated memory was 107.0 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 72.8 MB in the beginning and 444.5 MB in the end (delta: -371.7 MB). Peak memory consumption was 890.2 MB. Max. memory is 16.1 GB. [2021-11-07 08:11:06,907 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 107.0 MB. Free memory was 76.4 MB in the beginning and 76.3 MB in the end (delta: 70.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:11:06,907 INFO L168 Benchmark]: CACSL2BoogieTranslator took 484.02 ms. Allocated memory is still 107.0 MB. Free memory was 72.6 MB in the beginning and 56.2 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 08:11:06,908 INFO L168 Benchmark]: Boogie Preprocessor took 113.40 ms. Allocated memory is still 107.0 MB. Free memory was 56.2 MB in the beginning and 53.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:11:06,908 INFO L168 Benchmark]: RCFGBuilder took 754.00 ms. Allocated memory is still 142.6 MB. Free memory was 119.6 MB in the beginning and 97.3 MB in the end (delta: 22.3 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.1 GB. [2021-11-07 08:11:06,909 INFO L168 Benchmark]: TraceAbstraction took 70976.86 ms. Allocated memory was 142.6 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 96.7 MB in the beginning and 444.5 MB in the end (delta: -347.8 MB). Peak memory consumption was 876.0 MB. Max. memory is 16.1 GB. [2021-11-07 08:11:06,909 INFO L168 Benchmark]: Witness Printer took 4.35 ms. Allocated memory is still 1.4 GB. Free memory is still 444.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:11:06,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 107.0 MB. Free memory was 76.4 MB in the beginning and 76.3 MB in the end (delta: 70.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 484.02 ms. Allocated memory is still 107.0 MB. Free memory was 72.6 MB in the beginning and 56.2 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 113.40 ms. Allocated memory is still 107.0 MB. Free memory was 56.2 MB in the beginning and 53.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 754.00 ms. Allocated memory is still 142.6 MB. Free memory was 119.6 MB in the beginning and 97.3 MB in the end (delta: 22.3 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 70976.86 ms. Allocated memory was 142.6 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 96.7 MB in the beginning and 444.5 MB in the end (delta: -347.8 MB). Peak memory consumption was 876.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.35 ms. Allocated memory is still 1.4 GB. Free memory is still 444.5 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=49, \old(garbage)=54, \old(pc1)=67, \old(pc4)=50, \old(res4)=60, \old(S)=55, \old(S)=57, \old(t1)=70, \old(t1)=62, \old(t4)=53, \old(t4)=58, \old(x1)=61, \old(x1)=74, \old(x4)=51, \old(x4)=68, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=1, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, pc4++=1, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L572] COND FALSE !(t4 == ((void *)0)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L576] EXPR t4->next VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, t4->next={0:0}, x1={-1:0}, x4={0:0}] [L576] x4 = t4->next [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=-1, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={-1:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L579] COND TRUE S == t4 [L580] S = x4 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=-1, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=1, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc1++=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, S || 1 != pc1 || __VERIFIER_nondet_int()=0, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={-1:0}, x1={-1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, \result=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: 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: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 92 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 70.7s, OverallIterations: 28, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 41.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2610 SDtfs, 9650 SDslu, 6262 SDs, 0 SdLazy, 21611 SolverSat, 3963 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2366 GetRequests, 1507 SyntacticMatches, 6 SemanticMatches, 853 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18139 ImplicationChecksByTransitivity, 24.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25019occurred in iteration=27, InterpolantAutomatonStates: 737, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.9s AutomataMinimizationTime, 27 MinimizatonAttempts, 27612 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 2592 NumberOfCodeBlocks, 2592 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 2416 ConstructedInterpolants, 10 QuantifiedInterpolants, 11863 SizeOfPredicates, 78 NumberOfNonLiveVariables, 10163 ConjunctsInSsa, 373 ConjunctsInUnsatCore, 45 InterpolantComputations, 9 PerfectInterpolantSequences, 2905/3662 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 08:11:06,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/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_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/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_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/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_4b963f3a-568a-43c6-943e-bad6e3196a82/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 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:11:09,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:11:09,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:11:09,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:11:09,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:11:09,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:11:09,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:11:09,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:11:09,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:11:09,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:11:09,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:11:09,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:11:09,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:11:09,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:11:09,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:11:09,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:11:09,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:11:09,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:11:09,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:11:09,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:11:09,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:11:09,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:11:09,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:11:09,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:11:09,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:11:09,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:11:09,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:11:09,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:11:09,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:11:09,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:11:09,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:11:09,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:11:09,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:11:09,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:11:09,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:11:09,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:11:09,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:11:09,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:11:09,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:11:09,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:11:09,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:11:09,527 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-07 08:11:09,569 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:11:09,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:11:09,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:11:09,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:11:09,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:11:09,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:11:09,573 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:11:09,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:11:09,574 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:11:09,574 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 08:11:09,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:11:09,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:11:09,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:11:09,576 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 08:11:09,576 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 08:11:09,576 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 08:11:09,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:11:09,577 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 08:11:09,577 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 08:11:09,577 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 08:11:09,578 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:11:09,578 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:11:09,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:11:09,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:11:09,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:11:09,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:11:09,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:11:09,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:11:09,580 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 08:11:09,580 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 08:11:09,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:11:09,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 08:11:09,581 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_4b963f3a-568a-43c6-943e-bad6e3196a82/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2021-11-07 08:11:10,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:11:10,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:11:10,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:11:10,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:11:10,049 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:11:10,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-11-07 08:11:10,133 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/data/b3f110cb4/8f74b994675140f1b31856a760451eca/FLAG338d83da4 [2021-11-07 08:11:10,767 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:11:10,767 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/sv-benchmarks/c/memsafety/lockfree-3.3.i [2021-11-07 08:11:10,791 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/data/b3f110cb4/8f74b994675140f1b31856a760451eca/FLAG338d83da4 [2021-11-07 08:11:11,030 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/data/b3f110cb4/8f74b994675140f1b31856a760451eca [2021-11-07 08:11:11,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:11:11,039 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 08:11:11,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:11:11,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:11:11,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:11:11,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:11:11" (1/1) ... [2021-11-07 08:11:11,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74188479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:11, skipping insertion in model container [2021-11-07 08:11:11,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:11:11" (1/1) ... [2021-11-07 08:11:11,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:11:11,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:11:11,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:11:11,579 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:11:11,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:11:11,704 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:11:11,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:11 WrapperNode [2021-11-07 08:11:11,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:11:11,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:11:11,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:11:11,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:11:11,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:11" (1/1) ... [2021-11-07 08:11:11,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:11" (1/1) ... [2021-11-07 08:11:11,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:11" (1/1) ... [2021-11-07 08:11:11,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:11" (1/1) ... [2021-11-07 08:11:11,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:11" (1/1) ... [2021-11-07 08:11:11,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:11" (1/1) ... [2021-11-07 08:11:11,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:11" (1/1) ... [2021-11-07 08:11:11,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:11:11,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:11:11,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:11:11,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:11:11,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:11" (1/1) ... [2021-11-07 08:11:11,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:11:11,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:11,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:11:11,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:11:11,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 08:11:11,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:11:11,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 08:11:11,852 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 08:11:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 08:11:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 08:11:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-07 08:11:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-07 08:11:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-07 08:11:11,854 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-11-07 08:11:11,854 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-11-07 08:11:11,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 08:11:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 08:11:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 08:11:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 08:11:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 08:11:11,855 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 08:11:11,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:11:11,855 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 08:11:11,855 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 08:11:11,855 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 08:11:11,855 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 08:11:11,855 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 08:11:11,855 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 08:11:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 08:11:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 08:11:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 08:11:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 08:11:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 08:11:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 08:11:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 08:11:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 08:11:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 08:11:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 08:11:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 08:11:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 08:11:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-07 08:11:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-07 08:11:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-07 08:11:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 08:11:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 08:11:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 08:11:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 08:11:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 08:11:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 08:11:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 08:11:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 08:11:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 08:11:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 08:11:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 08:11:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 08:11:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 08:11:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 08:11:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 08:11:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 08:11:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 08:11:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 08:11:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 08:11:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 08:11:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 08:11:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 08:11:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 08:11:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 08:11:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 08:11:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 08:11:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 08:11:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 08:11:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 08:11:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 08:11:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 08:11:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 08:11:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 08:11:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 08:11:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 08:11:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 08:11:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 08:11:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 08:11:11,862 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 08:11:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 08:11:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 08:11:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 08:11:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 08:11:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 08:11:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 08:11:11,863 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 08:11:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 08:11:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 08:11:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 08:11:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 08:11:11,864 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 08:11:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 08:11:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 08:11:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 08:11:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 08:11:11,872 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 08:11:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 08:11:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 08:11:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 08:11:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 08:11:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 08:11:11,873 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 08:11:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 08:11:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 08:11:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 08:11:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 08:11:11,874 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 08:11:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 08:11:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 08:11:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 08:11:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 08:11:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 08:11:11,875 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 08:11:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 08:11:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 08:11:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 08:11:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 08:11:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 08:11:11,876 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 08:11:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 08:11:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 08:11:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 08:11:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 08:11:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 08:11:11,877 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 08:11:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 08:11:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-11-07 08:11:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:11:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 08:11:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:11:11,878 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-11-07 08:11:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:11:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 08:11:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 08:11:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:11:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 08:11:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 08:11:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:11:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 08:11:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 08:11:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 08:11:12,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:11:12,554 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-07 08:11:12,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:11:12 BoogieIcfgContainer [2021-11-07 08:11:12,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:11:12,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:11:12,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:11:12,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:11:12,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:11:11" (1/3) ... [2021-11-07 08:11:12,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8ae3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:11:12, skipping insertion in model container [2021-11-07 08:11:12,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:11:11" (2/3) ... [2021-11-07 08:11:12,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8ae3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:11:12, skipping insertion in model container [2021-11-07 08:11:12,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:11:12" (3/3) ... [2021-11-07 08:11:12,587 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2021-11-07 08:11:12,592 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:11:12,593 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-07 08:11:12,648 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:11:12,657 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 08:11:12,657 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-07 08:11:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 08:11:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:11:12,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:12,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:12,691 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash 913050877, now seen corresponding path program 1 times [2021-11-07 08:11:12,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:12,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514893205] [2021-11-07 08:11:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:12,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:12,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:12,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:12,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 08:11:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:12,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 08:11:12,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:13,016 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 08:11:13,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:13,061 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 08:11:13,062 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:13,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514893205] [2021-11-07 08:11:13,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514893205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:11:13,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:11:13,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 08:11:13,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113406033] [2021-11-07 08:11:13,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:11:13,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:13,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:11:13,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:11:13,106 INFO L87 Difference]: Start difference. First operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) 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 08:11:13,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:13,131 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-11-07 08:11:13,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:11:13,132 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 08:11:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:13,144 INFO L225 Difference]: With dead ends: 72 [2021-11-07 08:11:13,144 INFO L226 Difference]: Without dead ends: 69 [2021-11-07 08:11:13,145 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 08:11:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-07 08:11:13,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-07 08:11:13,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 63 states have internal predecessors, (78), 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 08:11:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-11-07 08:11:13,193 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 8 [2021-11-07 08:11:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:13,193 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-11-07 08:11:13,194 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 08:11:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-11-07 08:11:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:11:13,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:13,195 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:13,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:13,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:13,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash 913039345, now seen corresponding path program 1 times [2021-11-07 08:11:13,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:13,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980821639] [2021-11-07 08:11:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:13,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:13,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:13,411 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:13,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 08:11:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:11:13,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:13,729 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 08:11:13,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:13,854 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 08:11:13,854 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:13,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980821639] [2021-11-07 08:11:13,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980821639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:11:13,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:11:13,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 08:11:13,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440452532] [2021-11-07 08:11:13,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:11:13,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:13,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:11:13,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:11:13,858 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:11:13,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:13,924 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-11-07 08:11:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:11:13,926 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-11-07 08:11:13,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:13,934 INFO L225 Difference]: With dead ends: 120 [2021-11-07 08:11:13,934 INFO L226 Difference]: Without dead ends: 120 [2021-11-07 08:11:13,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 08:11:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-07 08:11:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-11-07 08:11:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 93 states have internal predecessors, (133), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 08:11:13,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2021-11-07 08:11:13,970 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 8 [2021-11-07 08:11:13,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:13,971 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2021-11-07 08:11:13,972 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:11:13,972 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2021-11-07 08:11:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:11:13,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:13,976 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:13,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:14,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:14,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:14,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1760552785, now seen corresponding path program 1 times [2021-11-07 08:11:14,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:14,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837531898] [2021-11-07 08:11:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:14,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:14,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:14,186 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:14,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 08:11:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:14,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:11:14,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:14,418 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 08:11:14,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:14,451 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 08:11:14,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:14,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837531898] [2021-11-07 08:11:14,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837531898] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:11:14,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:11:14,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 08:11:14,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643718212] [2021-11-07 08:11:14,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:11:14,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:14,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:11:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:11:14,459 INFO L87 Difference]: Start difference. First operand 102 states and 145 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, (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 08:11:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:14,653 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2021-11-07 08:11:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:11:14,654 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, (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 9 [2021-11-07 08:11:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:14,655 INFO L225 Difference]: With dead ends: 128 [2021-11-07 08:11:14,656 INFO L226 Difference]: Without dead ends: 125 [2021-11-07 08:11:14,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:11:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-07 08:11:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-11-07 08:11:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.8333333333333333) internal successors, (143), 104 states have internal predecessors, (143), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-07 08:11:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-11-07 08:11:14,689 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 9 [2021-11-07 08:11:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:14,689 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-11-07 08:11:14,689 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, (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 08:11:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-11-07 08:11:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:11:14,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:14,690 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:14,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:14,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:14,891 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:14,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:14,892 INFO L85 PathProgramCache]: Analyzing trace with hash 370381771, now seen corresponding path program 1 times [2021-11-07 08:11:14,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:14,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748806936] [2021-11-07 08:11:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:14,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:14,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:14,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:14,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 08:11:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:15,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:11:15,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:15,318 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 08:11:15,330 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 08:11:15,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:15,408 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 08:11:15,409 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:15,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748806936] [2021-11-07 08:11:15,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748806936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:11:15,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:11:15,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 08:11:15,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403319158] [2021-11-07 08:11:15,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:11:15,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:15,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:11:15,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:11:15,424 INFO L87 Difference]: Start difference. First operand 115 states and 168 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 08:11:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:15,701 INFO L93 Difference]: Finished difference Result 198 states and 290 transitions. [2021-11-07 08:11:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:11:15,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-11-07 08:11:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:15,708 INFO L225 Difference]: With dead ends: 198 [2021-11-07 08:11:15,708 INFO L226 Difference]: Without dead ends: 198 [2021-11-07 08:11:15,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 08:11:15,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-07 08:11:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-11-07 08:11:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 134 states have (on average 1.7761194029850746) internal successors, (238), 160 states have internal predecessors, (238), 14 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-11-07 08:11:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 276 transitions. [2021-11-07 08:11:15,754 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 276 transitions. Word has length 11 [2021-11-07 08:11:15,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:15,754 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 276 transitions. [2021-11-07 08:11:15,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 08:11:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 276 transitions. [2021-11-07 08:11:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:11:15,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:15,756 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:15,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:15,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:15,968 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash 370381772, now seen corresponding path program 1 times [2021-11-07 08:11:15,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:15,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243648233] [2021-11-07 08:11:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:15,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:15,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:15,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:16,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 08:11:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:16,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:11:16,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:16,323 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 08:11:16,348 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 08:11:16,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:16,486 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 08:11:16,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:16,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243648233] [2021-11-07 08:11:16,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243648233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:11:16,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:11:16,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 08:11:16,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475852147] [2021-11-07 08:11:16,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:11:16,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:11:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:11:16,492 INFO L87 Difference]: Start difference. First operand 177 states and 276 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 08:11:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:16,942 INFO L93 Difference]: Finished difference Result 333 states and 499 transitions. [2021-11-07 08:11:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:11:16,944 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 11 [2021-11-07 08:11:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:16,948 INFO L225 Difference]: With dead ends: 333 [2021-11-07 08:11:16,948 INFO L226 Difference]: Without dead ends: 333 [2021-11-07 08:11:16,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 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 08:11:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-07 08:11:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 295. [2021-11-07 08:11:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 242 states have (on average 1.7314049586776858) internal successors, (419), 268 states have internal predecessors, (419), 18 states have call successors, (18), 18 states have call predecessors, (18), 19 states have return successors, (35), 9 states have call predecessors, (35), 17 states have call successors, (35) [2021-11-07 08:11:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 472 transitions. [2021-11-07 08:11:16,981 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 472 transitions. Word has length 11 [2021-11-07 08:11:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:16,982 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 472 transitions. [2021-11-07 08:11:16,982 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 08:11:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 472 transitions. [2021-11-07 08:11:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:11:16,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:16,983 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:16,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:17,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:17,196 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:17,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1403059964, now seen corresponding path program 1 times [2021-11-07 08:11:17,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:17,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740917589] [2021-11-07 08:11:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:17,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:17,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:17,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:17,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 08:11:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:17,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:11:17,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:17,518 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 08:11:17,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:17,582 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 08:11:17,583 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:17,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740917589] [2021-11-07 08:11:17,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740917589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:11:17,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:11:17,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 08:11:17,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504615364] [2021-11-07 08:11:17,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:11:17,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:17,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:11:17,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:11:17,592 INFO L87 Difference]: Start difference. First operand 295 states and 472 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 08:11:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:17,643 INFO L93 Difference]: Finished difference Result 197 states and 283 transitions. [2021-11-07 08:11:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:11:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-11-07 08:11:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:17,648 INFO L225 Difference]: With dead ends: 197 [2021-11-07 08:11:17,648 INFO L226 Difference]: Without dead ends: 197 [2021-11-07 08:11:17,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:11:17,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-07 08:11:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2021-11-07 08:11:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 162 states have internal predecessors, (241), 12 states have call successors, (12), 12 states have call predecessors, (12), 13 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-11-07 08:11:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 271 transitions. [2021-11-07 08:11:17,685 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 271 transitions. Word has length 12 [2021-11-07 08:11:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:17,686 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 271 transitions. [2021-11-07 08:11:17,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 08:11:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 271 transitions. [2021-11-07 08:11:17,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:11:17,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:17,688 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:17,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 08:11:17,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:17,899 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:17,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2074754906, now seen corresponding path program 1 times [2021-11-07 08:11:17,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:17,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450591733] [2021-11-07 08:11:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:17,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:17,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:17,902 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:17,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 08:11:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:18,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:11:18,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:18,329 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 08:11:18,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:18,384 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 08:11:18,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:18,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450591733] [2021-11-07 08:11:18,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450591733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:11:18,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:11:18,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 08:11:18,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410742404] [2021-11-07 08:11:18,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:11:18,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:18,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:11:18,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:11:18,386 INFO L87 Difference]: Start difference. First operand 181 states and 271 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 08:11:18,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:18,422 INFO L93 Difference]: Finished difference Result 297 states and 420 transitions. [2021-11-07 08:11:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:11:18,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2021-11-07 08:11:18,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:18,425 INFO L225 Difference]: With dead ends: 297 [2021-11-07 08:11:18,426 INFO L226 Difference]: Without dead ends: 297 [2021-11-07 08:11:18,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:11:18,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-07 08:11:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 281. [2021-11-07 08:11:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 216 states have (on average 1.5648148148148149) internal successors, (338), 246 states have internal predecessors, (338), 22 states have call successors, (22), 22 states have call predecessors, (22), 31 states have return successors, (44), 13 states have call predecessors, (44), 21 states have call successors, (44) [2021-11-07 08:11:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 404 transitions. [2021-11-07 08:11:18,440 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 404 transitions. Word has length 13 [2021-11-07 08:11:18,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:18,440 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 404 transitions. [2021-11-07 08:11:18,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 08:11:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 404 transitions. [2021-11-07 08:11:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 08:11:18,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:18,442 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:18,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:18,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:18,651 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1772709125, now seen corresponding path program 1 times [2021-11-07 08:11:18,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:18,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922152857] [2021-11-07 08:11:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:18,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:18,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:18,654 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:18,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 08:11:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:18,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:11:18,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:19,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:19,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:19,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922152857] [2021-11-07 08:11:19,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922152857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:19,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:19,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-07 08:11:19,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460011179] [2021-11-07 08:11:19,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:11:19,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:11:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:11:19,274 INFO L87 Difference]: Start difference. First operand 281 states and 404 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:11:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:20,026 INFO L93 Difference]: Finished difference Result 690 states and 1010 transitions. [2021-11-07 08:11:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:11:20,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2021-11-07 08:11:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:20,032 INFO L225 Difference]: With dead ends: 690 [2021-11-07 08:11:20,033 INFO L226 Difference]: Without dead ends: 690 [2021-11-07 08:11:20,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:11:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-07 08:11:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 587. [2021-11-07 08:11:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 472 states have (on average 1.5423728813559323) internal successors, (728), 520 states have internal predecessors, (728), 42 states have call successors, (42), 42 states have call predecessors, (42), 61 states have return successors, (95), 25 states have call predecessors, (95), 41 states have call successors, (95) [2021-11-07 08:11:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 865 transitions. [2021-11-07 08:11:20,101 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 865 transitions. Word has length 18 [2021-11-07 08:11:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:20,101 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 865 transitions. [2021-11-07 08:11:20,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:11:20,103 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 865 transitions. [2021-11-07 08:11:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:11:20,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:20,107 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:20,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:20,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:20,320 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1092083902, now seen corresponding path program 1 times [2021-11-07 08:11:20,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:20,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281399115] [2021-11-07 08:11:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:20,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:20,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:20,325 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:20,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 08:11:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:20,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:11:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:20,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:21,235 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:21,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281399115] [2021-11-07 08:11:21,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281399115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:21,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:21,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-07 08:11:21,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3527666] [2021-11-07 08:11:21,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:11:21,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:11:21,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:11:21,237 INFO L87 Difference]: Start difference. First operand 587 states and 865 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:11:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:22,015 INFO L93 Difference]: Finished difference Result 945 states and 1354 transitions. [2021-11-07 08:11:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:11:22,016 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-11-07 08:11:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:22,022 INFO L225 Difference]: With dead ends: 945 [2021-11-07 08:11:22,023 INFO L226 Difference]: Without dead ends: 945 [2021-11-07 08:11:22,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:11:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-11-07 08:11:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 837. [2021-11-07 08:11:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 666 states have (on average 1.509009009009009) internal successors, (1005), 738 states have internal predecessors, (1005), 62 states have call successors, (62), 62 states have call predecessors, (62), 97 states have return successors, (127), 37 states have call predecessors, (127), 61 states have call successors, (127) [2021-11-07 08:11:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1194 transitions. [2021-11-07 08:11:22,062 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1194 transitions. Word has length 20 [2021-11-07 08:11:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:22,062 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1194 transitions. [2021-11-07 08:11:22,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:11:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1194 transitions. [2021-11-07 08:11:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:11:22,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:22,064 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:22,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:22,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:22,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:22,281 INFO L85 PathProgramCache]: Analyzing trace with hash -389155418, now seen corresponding path program 2 times [2021-11-07 08:11:22,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:22,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307897115] [2021-11-07 08:11:22,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:11:22,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:22,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:22,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:22,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 08:11:22,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:11:22,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:11:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:11:22,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:11:22,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:22,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307897115] [2021-11-07 08:11:22,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307897115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:22,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:22,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-07 08:11:22,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600452025] [2021-11-07 08:11:22,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:11:22,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:22,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:11:22,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:11:22,858 INFO L87 Difference]: Start difference. First operand 837 states and 1194 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 08:11:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:23,095 INFO L93 Difference]: Finished difference Result 1191 states and 1639 transitions. [2021-11-07 08:11:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:11:23,096 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2021-11-07 08:11:23,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:23,104 INFO L225 Difference]: With dead ends: 1191 [2021-11-07 08:11:23,104 INFO L226 Difference]: Without dead ends: 1191 [2021-11-07 08:11:23,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:11:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-11-07 08:11:23,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1147. [2021-11-07 08:11:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 908 states have (on average 1.4515418502202644) internal successors, (1318), 1016 states have internal predecessors, (1318), 82 states have call successors, (82), 82 states have call predecessors, (82), 145 states have return successors, (195), 49 states have call predecessors, (195), 81 states have call successors, (195) [2021-11-07 08:11:23,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1595 transitions. [2021-11-07 08:11:23,168 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1595 transitions. Word has length 27 [2021-11-07 08:11:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:23,168 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1595 transitions. [2021-11-07 08:11:23,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 08:11:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1595 transitions. [2021-11-07 08:11:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:11:23,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:23,176 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:23,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:23,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:23,382 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:23,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1024254868, now seen corresponding path program 1 times [2021-11-07 08:11:23,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:23,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192479854] [2021-11-07 08:11:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:23,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:23,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:23,384 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:23,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 08:11:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:23,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:11:23,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:23,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:24,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:24,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192479854] [2021-11-07 08:11:24,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192479854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:24,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:24,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-11-07 08:11:24,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437704403] [2021-11-07 08:11:24,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:11:24,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:24,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:11:24,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:11:24,413 INFO L87 Difference]: Start difference. First operand 1147 states and 1595 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:11:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:25,198 INFO L93 Difference]: Finished difference Result 1680 states and 2292 transitions. [2021-11-07 08:11:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:11:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2021-11-07 08:11:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:25,211 INFO L225 Difference]: With dead ends: 1680 [2021-11-07 08:11:25,211 INFO L226 Difference]: Without dead ends: 1680 [2021-11-07 08:11:25,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:11:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-11-07 08:11:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1467. [2021-11-07 08:11:25,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1157 states have (on average 1.418323249783924) internal successors, (1641), 1297 states have internal predecessors, (1641), 107 states have call successors, (107), 107 states have call predecessors, (107), 191 states have return successors, (265), 63 states have call predecessors, (265), 106 states have call successors, (265) [2021-11-07 08:11:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2013 transitions. [2021-11-07 08:11:25,277 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2013 transitions. Word has length 29 [2021-11-07 08:11:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:25,277 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 2013 transitions. [2021-11-07 08:11:25,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:11:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2013 transitions. [2021-11-07 08:11:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 08:11:25,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:25,279 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, 1] [2021-11-07 08:11:25,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:25,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:25,494 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:25,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:25,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1836404925, now seen corresponding path program 1 times [2021-11-07 08:11:25,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:25,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150523777] [2021-11-07 08:11:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:25,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:25,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:25,504 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:25,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 08:11:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:25,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:11:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:11:25,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:26,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:26,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150523777] [2021-11-07 08:11:26,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150523777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:26,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:26,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-11-07 08:11:26,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250702876] [2021-11-07 08:11:26,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:11:26,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:26,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:11:26,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:11:26,221 INFO L87 Difference]: Start difference. First operand 1467 states and 2013 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:11:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:27,253 INFO L93 Difference]: Finished difference Result 1681 states and 2147 transitions. [2021-11-07 08:11:27,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:11:27,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-11-07 08:11:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:27,263 INFO L225 Difference]: With dead ends: 1681 [2021-11-07 08:11:27,263 INFO L226 Difference]: Without dead ends: 1497 [2021-11-07 08:11:27,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:11:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-11-07 08:11:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1379. [2021-11-07 08:11:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1071 states have (on average 1.38468720821662) internal successors, (1483), 1209 states have internal predecessors, (1483), 107 states have call successors, (107), 107 states have call predecessors, (107), 189 states have return successors, (237), 63 states have call predecessors, (237), 106 states have call successors, (237) [2021-11-07 08:11:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1827 transitions. [2021-11-07 08:11:27,340 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1827 transitions. Word has length 30 [2021-11-07 08:11:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:27,340 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 1827 transitions. [2021-11-07 08:11:27,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:11:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1827 transitions. [2021-11-07 08:11:27,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 08:11:27,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:27,343 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:27,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:27,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:27,555 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:27,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:27,556 INFO L85 PathProgramCache]: Analyzing trace with hash -746793865, now seen corresponding path program 2 times [2021-11-07 08:11:27,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:27,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739618976] [2021-11-07 08:11:27,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:11:27,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:27,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:27,558 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:27,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 08:11:27,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:11:27,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:27,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:11:27,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:11:28,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:11:28,417 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:28,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739618976] [2021-11-07 08:11:28,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739618976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:28,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:28,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-11-07 08:11:28,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803022226] [2021-11-07 08:11:28,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:11:28,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:28,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:11:28,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:11:28,419 INFO L87 Difference]: Start difference. First operand 1379 states and 1827 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-07 08:11:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:29,719 INFO L93 Difference]: Finished difference Result 2266 states and 3058 transitions. [2021-11-07 08:11:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:11:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2021-11-07 08:11:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:29,735 INFO L225 Difference]: With dead ends: 2266 [2021-11-07 08:11:29,735 INFO L226 Difference]: Without dead ends: 2170 [2021-11-07 08:11:29,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:11:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-11-07 08:11:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1993. [2021-11-07 08:11:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1543 states have (on average 1.4121840570317563) internal successors, (2179), 1753 states have internal predecessors, (2179), 165 states have call successors, (165), 153 states have call predecessors, (165), 273 states have return successors, (421), 87 states have call predecessors, (421), 164 states have call successors, (421) [2021-11-07 08:11:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2765 transitions. [2021-11-07 08:11:29,818 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2765 transitions. Word has length 39 [2021-11-07 08:11:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:29,819 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 2765 transitions. [2021-11-07 08:11:29,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-07 08:11:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2765 transitions. [2021-11-07 08:11:29,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 08:11:29,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:29,822 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:29,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:30,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:30,035 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:30,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:30,035 INFO L85 PathProgramCache]: Analyzing trace with hash -268124004, now seen corresponding path program 1 times [2021-11-07 08:11:30,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:30,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617193379] [2021-11-07 08:11:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:30,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:30,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:30,038 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:30,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 08:11:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:30,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:11:30,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:11:30,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:31,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:31,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617193379] [2021-11-07 08:11:31,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617193379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:31,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:31,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-11-07 08:11:31,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711773635] [2021-11-07 08:11:31,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:11:31,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:31,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:11:31,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:11:31,073 INFO L87 Difference]: Start difference. First operand 1993 states and 2765 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-07 08:11:32,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:32,580 INFO L93 Difference]: Finished difference Result 2261 states and 2971 transitions. [2021-11-07 08:11:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:11:32,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2021-11-07 08:11:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:32,594 INFO L225 Difference]: With dead ends: 2261 [2021-11-07 08:11:32,594 INFO L226 Difference]: Without dead ends: 2089 [2021-11-07 08:11:32,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:11:32,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-11-07 08:11:32,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1917. [2021-11-07 08:11:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1469 states have (on average 1.3921034717494893) internal successors, (2045), 1677 states have internal predecessors, (2045), 165 states have call successors, (165), 153 states have call predecessors, (165), 271 states have return successors, (393), 87 states have call predecessors, (393), 164 states have call successors, (393) [2021-11-07 08:11:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2603 transitions. [2021-11-07 08:11:32,690 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2603 transitions. Word has length 39 [2021-11-07 08:11:32,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:32,691 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 2603 transitions. [2021-11-07 08:11:32,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-07 08:11:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2603 transitions. [2021-11-07 08:11:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:11:32,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:32,693 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:32,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:32,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:32,902 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:32,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:32,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1040706548, now seen corresponding path program 1 times [2021-11-07 08:11:32,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:32,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976555663] [2021-11-07 08:11:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:32,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:32,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:32,904 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:32,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 08:11:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:33,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:11:33,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:11:33,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:35,288 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:35,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976555663] [2021-11-07 08:11:35,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976555663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:35,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:35,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-11-07 08:11:35,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686292151] [2021-11-07 08:11:35,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:11:35,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:35,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:11:35,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:11:35,290 INFO L87 Difference]: Start difference. First operand 1917 states and 2603 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-07 08:11:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:39,795 INFO L93 Difference]: Finished difference Result 3752 states and 4910 transitions. [2021-11-07 08:11:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 08:11:39,796 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 45 [2021-11-07 08:11:39,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:39,817 INFO L225 Difference]: With dead ends: 3752 [2021-11-07 08:11:39,818 INFO L226 Difference]: Without dead ends: 3716 [2021-11-07 08:11:39,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=977, Invalid=4279, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 08:11:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2021-11-07 08:11:39,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3017. [2021-11-07 08:11:39,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 2325 states have (on average 1.3372043010752688) internal successors, (3109), 2625 states have internal predecessors, (3109), 257 states have call successors, (257), 257 states have call predecessors, (257), 423 states have return successors, (665), 135 states have call predecessors, (665), 256 states have call successors, (665) [2021-11-07 08:11:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4031 transitions. [2021-11-07 08:11:39,933 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4031 transitions. Word has length 45 [2021-11-07 08:11:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:39,934 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4031 transitions. [2021-11-07 08:11:39,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-07 08:11:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4031 transitions. [2021-11-07 08:11:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 08:11:39,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:39,935 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:39,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:40,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:40,153 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:40,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:40,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1515964261, now seen corresponding path program 1 times [2021-11-07 08:11:40,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:40,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866404806] [2021-11-07 08:11:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:40,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:40,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:40,155 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:40,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 08:11:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:40,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:11:40,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:11:40,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:41,441 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:41,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866404806] [2021-11-07 08:11:41,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866404806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:41,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:41,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-11-07 08:11:41,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661367329] [2021-11-07 08:11:41,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:11:41,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:11:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:11:41,443 INFO L87 Difference]: Start difference. First operand 3017 states and 4031 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-07 08:11:42,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:42,952 INFO L93 Difference]: Finished difference Result 4090 states and 5262 transitions. [2021-11-07 08:11:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:11:42,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-11-07 08:11:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:42,977 INFO L225 Difference]: With dead ends: 4090 [2021-11-07 08:11:42,978 INFO L226 Difference]: Without dead ends: 3950 [2021-11-07 08:11:42,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:11:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-11-07 08:11:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3716. [2021-11-07 08:11:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 2853 states have (on average 1.3168594461969856) internal successors, (3757), 3219 states have internal predecessors, (3757), 326 states have call successors, (326), 326 states have call predecessors, (326), 525 states have return successors, (779), 171 states have call predecessors, (779), 325 states have call successors, (779) [2021-11-07 08:11:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4862 transitions. [2021-11-07 08:11:43,129 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4862 transitions. Word has length 48 [2021-11-07 08:11:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:43,129 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 4862 transitions. [2021-11-07 08:11:43,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-07 08:11:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4862 transitions. [2021-11-07 08:11:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:11:43,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:43,131 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:43,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:43,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:43,354 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:43,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:43,354 INFO L85 PathProgramCache]: Analyzing trace with hash 574627678, now seen corresponding path program 1 times [2021-11-07 08:11:43,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:43,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551241120] [2021-11-07 08:11:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:43,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:43,357 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:43,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 08:11:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:43,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 08:11:43,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 08:11:44,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:11:44,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:44,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551241120] [2021-11-07 08:11:44,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551241120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:44,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:44,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 22 [2021-11-07 08:11:44,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589371745] [2021-11-07 08:11:44,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:11:44,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:44,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:11:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:11:44,865 INFO L87 Difference]: Start difference. First operand 3716 states and 4862 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-07 08:11:47,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:47,243 INFO L93 Difference]: Finished difference Result 4249 states and 5467 transitions. [2021-11-07 08:11:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 08:11:47,255 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 59 [2021-11-07 08:11:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:47,285 INFO L225 Difference]: With dead ends: 4249 [2021-11-07 08:11:47,285 INFO L226 Difference]: Without dead ends: 4177 [2021-11-07 08:11:47,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=493, Invalid=1957, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:11:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2021-11-07 08:11:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 4017. [2021-11-07 08:11:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 3083 states have (on average 1.3139798897178074) internal successors, (4051), 3485 states have internal predecessors, (4051), 349 states have call successors, (349), 349 states have call predecessors, (349), 573 states have return successors, (833), 183 states have call predecessors, (833), 348 states have call successors, (833) [2021-11-07 08:11:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 5233 transitions. [2021-11-07 08:11:47,407 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 5233 transitions. Word has length 59 [2021-11-07 08:11:47,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:47,408 INFO L470 AbstractCegarLoop]: Abstraction has 4017 states and 5233 transitions. [2021-11-07 08:11:47,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-07 08:11:47,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 5233 transitions. [2021-11-07 08:11:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:11:47,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:47,410 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:47,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:47,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:47,624 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:47,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash 517554629, now seen corresponding path program 2 times [2021-11-07 08:11:47,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:47,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867229036] [2021-11-07 08:11:47,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:11:47,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:47,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:47,626 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:47,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 08:11:48,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:11:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:48,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:11:48,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 08:11:49,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:11:51,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:51,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867229036] [2021-11-07 08:11:51,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867229036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:51,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:51,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 32 [2021-11-07 08:11:51,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424829376] [2021-11-07 08:11:51,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 08:11:51,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:51,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 08:11:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:11:51,354 INFO L87 Difference]: Start difference. First operand 4017 states and 5233 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-07 08:11:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:58,207 INFO L93 Difference]: Finished difference Result 7214 states and 9448 transitions. [2021-11-07 08:11:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-07 08:11:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 70 [2021-11-07 08:11:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:58,241 INFO L225 Difference]: With dead ends: 7214 [2021-11-07 08:11:58,241 INFO L226 Difference]: Without dead ends: 7154 [2021-11-07 08:11:58,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1482, Invalid=6890, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 08:11:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7154 states. [2021-11-07 08:11:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7154 to 5071. [2021-11-07 08:11:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 3907 states have (on average 1.3137957512157665) internal successors, (5133), 4429 states have internal predecessors, (5133), 421 states have call successors, (421), 421 states have call predecessors, (421), 731 states have return successors, (1057), 221 states have call predecessors, (1057), 420 states have call successors, (1057) [2021-11-07 08:11:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 6611 transitions. [2021-11-07 08:11:58,472 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 6611 transitions. Word has length 70 [2021-11-07 08:11:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:58,473 INFO L470 AbstractCegarLoop]: Abstraction has 5071 states and 6611 transitions. [2021-11-07 08:11:58,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-07 08:11:58,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 6611 transitions. [2021-11-07 08:11:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:11:58,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:58,476 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:58,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:58,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:11:58,691 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:11:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:58,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1608789574, now seen corresponding path program 1 times [2021-11-07 08:11:58,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:11:58,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556355535] [2021-11-07 08:11:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:58,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:11:58,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:11:58,692 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:11:58,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 08:11:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:11:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-07 08:11:59,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:11:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-07 08:11:59,968 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:11:59,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556355535] [2021-11-07 08:11:59,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556355535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:11:59,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:59,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-07 08:11:59,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522377407] [2021-11-07 08:11:59,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:11:59,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:11:59,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:11:59,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:11:59,971 INFO L87 Difference]: Start difference. First operand 5071 states and 6611 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-07 08:12:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:00,594 INFO L93 Difference]: Finished difference Result 9835 states and 12944 transitions. [2021-11-07 08:12:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:12:00,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2021-11-07 08:12:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:00,634 INFO L225 Difference]: With dead ends: 9835 [2021-11-07 08:12:00,634 INFO L226 Difference]: Without dead ends: 9835 [2021-11-07 08:12:00,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:12:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9835 states. [2021-11-07 08:12:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9835 to 9811. [2021-11-07 08:12:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9811 states, 7495 states have (on average 1.313809206137425) internal successors, (9847), 8623 states have internal predecessors, (9847), 778 states have call successors, (778), 778 states have call predecessors, (778), 1526 states have return successors, (2299), 410 states have call predecessors, (2299), 777 states have call successors, (2299) [2021-11-07 08:12:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9811 states to 9811 states and 12924 transitions. [2021-11-07 08:12:00,908 INFO L78 Accepts]: Start accepts. Automaton has 9811 states and 12924 transitions. Word has length 71 [2021-11-07 08:12:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:00,908 INFO L470 AbstractCegarLoop]: Abstraction has 9811 states and 12924 transitions. [2021-11-07 08:12:00,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 3 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-07 08:12:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 9811 states and 12924 transitions. [2021-11-07 08:12:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:12:00,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:00,911 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:00,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:01,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:12:01,131 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:12:01,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:01,132 INFO L85 PathProgramCache]: Analyzing trace with hash -511357765, now seen corresponding path program 1 times [2021-11-07 08:12:01,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:12:01,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232441654] [2021-11-07 08:12:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:01,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:12:01,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:12:01,133 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:12:01,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 08:12:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:01,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:12:01,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:01,901 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 08:12:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:12:02,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:12:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:12:03,347 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:12:03,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232441654] [2021-11-07 08:12:03,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232441654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:12:03,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:03,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-07 08:12:03,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170460254] [2021-11-07 08:12:03,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:12:03,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:12:03,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:12:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:12:03,350 INFO L87 Difference]: Start difference. First operand 9811 states and 12924 transitions. Second operand has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-07 08:12:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:05,686 INFO L93 Difference]: Finished difference Result 16626 states and 22220 transitions. [2021-11-07 08:12:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:12:05,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 79 [2021-11-07 08:12:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:05,739 INFO L225 Difference]: With dead ends: 16626 [2021-11-07 08:12:05,739 INFO L226 Difference]: Without dead ends: 16626 [2021-11-07 08:12:05,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:12:05,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16626 states. [2021-11-07 08:12:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16626 to 14338. [2021-11-07 08:12:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14338 states, 11019 states have (on average 1.329793992195299) internal successors, (14653), 12646 states have internal predecessors, (14653), 1114 states have call successors, (1114), 1114 states have call predecessors, (1114), 2194 states have return successors, (3523), 578 states have call predecessors, (3523), 1113 states have call successors, (3523) [2021-11-07 08:12:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14338 states to 14338 states and 19290 transitions. [2021-11-07 08:12:06,175 INFO L78 Accepts]: Start accepts. Automaton has 14338 states and 19290 transitions. Word has length 79 [2021-11-07 08:12:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:06,175 INFO L470 AbstractCegarLoop]: Abstraction has 14338 states and 19290 transitions. [2021-11-07 08:12:06,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.571428571428571) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-07 08:12:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 14338 states and 19290 transitions. [2021-11-07 08:12:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:12:06,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:06,184 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:06,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:06,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:12:06,407 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:12:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:06,408 INFO L85 PathProgramCache]: Analyzing trace with hash -511357764, now seen corresponding path program 1 times [2021-11-07 08:12:06,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:12:06,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350221818] [2021-11-07 08:12:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:06,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:12:06,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:12:06,410 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:12:06,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 08:12:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:07,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 08:12:07,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:07,414 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 08:12:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:12:08,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:12:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-07 08:12:12,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:12:12,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350221818] [2021-11-07 08:12:12,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350221818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:12:12,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:12,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-07 08:12:12,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716365555] [2021-11-07 08:12:12,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:12:12,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:12:12,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:12:12,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:12:12,708 INFO L87 Difference]: Start difference. First operand 14338 states and 19290 transitions. Second operand has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-07 08:12:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:22,554 INFO L93 Difference]: Finished difference Result 22975 states and 31271 transitions. [2021-11-07 08:12:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:12:22,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 79 [2021-11-07 08:12:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:22,713 INFO L225 Difference]: With dead ends: 22975 [2021-11-07 08:12:22,725 INFO L226 Difference]: Without dead ends: 22975 [2021-11-07 08:12:22,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:12:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22975 states. [2021-11-07 08:12:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22975 to 19568. [2021-11-07 08:12:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19568 states, 15241 states have (on average 1.3503707105832952) internal successors, (20581), 17376 states have internal predecessors, (20581), 1446 states have call successors, (1446), 1446 states have call predecessors, (1446), 2870 states have return successors, (4913), 746 states have call predecessors, (4913), 1445 states have call successors, (4913) [2021-11-07 08:12:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19568 states to 19568 states and 26940 transitions. [2021-11-07 08:12:23,303 INFO L78 Accepts]: Start accepts. Automaton has 19568 states and 26940 transitions. Word has length 79 [2021-11-07 08:12:23,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:23,304 INFO L470 AbstractCegarLoop]: Abstraction has 19568 states and 26940 transitions. [2021-11-07 08:12:23,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 18 states have internal predecessors, (79), 7 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-07 08:12:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 19568 states and 26940 transitions. [2021-11-07 08:12:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 08:12:23,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:23,309 INFO L513 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:23,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:23,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:12:23,530 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:12:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash 175036294, now seen corresponding path program 1 times [2021-11-07 08:12:23,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:12:23,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997141737] [2021-11-07 08:12:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:23,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:12:23,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:12:23,533 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:12:23,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 08:12:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:24,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:12:24,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-07 08:12:25,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:12:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 29 proven. 42 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-07 08:12:25,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:12:25,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997141737] [2021-11-07 08:12:25,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997141737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:12:25,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:25,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-11-07 08:12:25,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571045492] [2021-11-07 08:12:25,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:12:25,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:12:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:12:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:12:25,879 INFO L87 Difference]: Start difference. First operand 19568 states and 26940 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-07 08:12:28,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:28,369 INFO L93 Difference]: Finished difference Result 26145 states and 35199 transitions. [2021-11-07 08:12:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:12:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 98 [2021-11-07 08:12:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:28,459 INFO L225 Difference]: With dead ends: 26145 [2021-11-07 08:12:28,459 INFO L226 Difference]: Without dead ends: 24927 [2021-11-07 08:12:28,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:12:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24927 states. [2021-11-07 08:12:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24927 to 23061. [2021-11-07 08:12:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23061 states, 17872 states have (on average 1.3545210384959714) internal successors, (24208), 20491 states have internal predecessors, (24208), 1698 states have call successors, (1698), 1698 states have call predecessors, (1698), 3480 states have return successors, (5737), 872 states have call predecessors, (5737), 1697 states have call successors, (5737) [2021-11-07 08:12:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23061 states to 23061 states and 31643 transitions. [2021-11-07 08:12:29,072 INFO L78 Accepts]: Start accepts. Automaton has 23061 states and 31643 transitions. Word has length 98 [2021-11-07 08:12:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:29,072 INFO L470 AbstractCegarLoop]: Abstraction has 23061 states and 31643 transitions. [2021-11-07 08:12:29,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 12 states have internal predecessors, (81), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-07 08:12:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 23061 states and 31643 transitions. [2021-11-07 08:12:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 08:12:29,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:29,079 INFO L513 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:29,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:29,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:12:29,295 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:12:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:29,295 INFO L85 PathProgramCache]: Analyzing trace with hash -159277390, now seen corresponding path program 2 times [2021-11-07 08:12:29,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:12:29,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779307933] [2021-11-07 08:12:29,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:12:29,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:12:29,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:12:29,298 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:12:29,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 08:12:30,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:12:30,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:12:30,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:12:30,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 92 proven. 37 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 08:12:31,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:12:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 48 proven. 57 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-07 08:12:32,021 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:12:32,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779307933] [2021-11-07 08:12:32,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779307933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:12:32,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:32,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-11-07 08:12:32,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910465080] [2021-11-07 08:12:32,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:12:32,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:12:32,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:12:32,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:12:32,023 INFO L87 Difference]: Start difference. First operand 23061 states and 31643 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-07 08:12:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:34,814 INFO L93 Difference]: Finished difference Result 65936 states and 93992 transitions. [2021-11-07 08:12:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:12:34,815 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) Word has length 107 [2021-11-07 08:12:34,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:35,073 INFO L225 Difference]: With dead ends: 65936 [2021-11-07 08:12:35,074 INFO L226 Difference]: Without dead ends: 64256 [2021-11-07 08:12:35,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:12:35,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64256 states. [2021-11-07 08:12:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64256 to 61721. [2021-11-07 08:12:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61721 states, 48744 states have (on average 1.338667323157722) internal successors, (65252), 54131 states have internal predecessors, (65252), 5038 states have call successors, (5038), 5038 states have call predecessors, (5038), 7928 states have return successors, (18397), 2552 states have call predecessors, (18397), 5037 states have call successors, (18397) [2021-11-07 08:12:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61721 states to 61721 states and 88687 transitions. [2021-11-07 08:12:38,026 INFO L78 Accepts]: Start accepts. Automaton has 61721 states and 88687 transitions. Word has length 107 [2021-11-07 08:12:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:38,027 INFO L470 AbstractCegarLoop]: Abstraction has 61721 states and 88687 transitions. [2021-11-07 08:12:38,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 16 states have internal predecessors, (103), 8 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-07 08:12:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 61721 states and 88687 transitions. [2021-11-07 08:12:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 08:12:38,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:38,033 INFO L513 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:38,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:38,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:12:38,259 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:12:38,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:38,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1851960145, now seen corresponding path program 1 times [2021-11-07 08:12:38,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:12:38,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431869709] [2021-11-07 08:12:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:38,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:12:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:12:38,262 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:12:38,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 08:12:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:12:39,437 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:12:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:12:39,965 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-07 08:12:39,965 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:12:39,966 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-11-07 08:12:39,968 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-11-07 08:12:39,968 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-11-07 08:12:39,969 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-11-07 08:12:39,969 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-11-07 08:12:39,969 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-11-07 08:12:39,969 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-11-07 08:12:39,969 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-11-07 08:12:39,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-11-07 08:12:39,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-11-07 08:12:39,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-11-07 08:12:39,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-11-07 08:12:39,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-11-07 08:12:39,970 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-11-07 08:12:39,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-11-07 08:12:39,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-07 08:12:39,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-07 08:12:39,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:12:39,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:12:39,971 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:12:39,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:40,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:12:40,196 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:40,199 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:12:40,359 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-07 08:12:40,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:12:40 BoogieIcfgContainer [2021-11-07 08:12:40,471 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:12:40,472 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:12:40,472 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:12:40,473 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:12:40,473 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:11:12" (3/4) ... [2021-11-07 08:12:40,476 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 08:12:40,476 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:12:40,478 INFO L168 Benchmark]: Toolchain (without parser) took 89438.44 ms. Allocated memory was 56.6 MB in the beginning and 765.5 MB in the end (delta: 708.8 MB). Free memory was 33.1 MB in the beginning and 352.6 MB in the end (delta: -319.6 MB). Peak memory consumption was 388.8 MB. Max. memory is 16.1 GB. [2021-11-07 08:12:40,479 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 56.6 MB. Free memory was 37.4 MB in the beginning and 37.3 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:12:40,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.29 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 32.9 MB in the beginning and 44.3 MB in the end (delta: -11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:12:40,480 INFO L168 Benchmark]: Boogie Preprocessor took 74.18 ms. Allocated memory is still 69.2 MB. Free memory was 44.1 MB in the beginning and 41.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:12:40,480 INFO L168 Benchmark]: RCFGBuilder took 775.75 ms. Allocated memory is still 69.2 MB. Free memory was 40.8 MB in the beginning and 32.0 MB in the end (delta: 8.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2021-11-07 08:12:40,481 INFO L168 Benchmark]: TraceAbstraction took 87891.85 ms. Allocated memory was 69.2 MB in the beginning and 765.5 MB in the end (delta: 696.3 MB). Free memory was 48.4 MB in the beginning and 353.7 MB in the end (delta: -305.3 MB). Peak memory consumption was 389.5 MB. Max. memory is 16.1 GB. [2021-11-07 08:12:40,481 INFO L168 Benchmark]: Witness Printer took 4.46 ms. Allocated memory is still 765.5 MB. Free memory was 353.7 MB in the beginning and 352.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:12:40,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 56.6 MB. Free memory was 37.4 MB in the beginning and 37.3 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 663.29 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 32.9 MB in the beginning and 44.3 MB in the end (delta: -11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 74.18 ms. Allocated memory is still 69.2 MB. Free memory was 44.1 MB in the beginning and 41.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 775.75 ms. Allocated memory is still 69.2 MB. Free memory was 40.8 MB in the beginning and 32.0 MB in the end (delta: 8.8 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 87891.85 ms. Allocated memory was 69.2 MB in the beginning and 765.5 MB in the end (delta: 696.3 MB). Free memory was 48.4 MB in the beginning and 353.7 MB in the end (delta: -305.3 MB). Peak memory consumption was 389.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.46 ms. Allocated memory is still 765.5 MB. Free memory was 353.7 MB in the beginning and 352.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=18, \old(pc4)=28, \old(res4)=22, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, pc4++=1, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L572] COND FALSE !(t4 == ((void *)0)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=2, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, pc4++=2, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L576] EXPR t4->next VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=3, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, pc4++=3, res4=0, S={1:0}, t1={0:0}, t4={1:0}, t4->next={0:0}, x1={1:0}, x4={0:0}] [L576] x4 = t4->next [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={1:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L579] COND TRUE S == t4 [L580] S = x4 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=4, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, pc4++=4, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L598] RET pop() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc1++=6, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={1:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, \result=0, garbage={0:0}, pc1=1, pc4=5, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: 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: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 87.5s, OverallIterations: 24, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 41.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3107 SDtfs, 16252 SDslu, 5564 SDs, 0 SdLazy, 14139 SolverSat, 3928 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2263 GetRequests, 1651 SyntacticMatches, 10 SemanticMatches, 602 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6128 ImplicationChecksByTransitivity, 20.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61721occurred in iteration=23, InterpolantAutomatonStates: 468, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.1s AutomataMinimizationTime, 23 MinimizatonAttempts, 14350 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 21.9s InterpolantComputationTime, 1039 NumberOfCodeBlocks, 1039 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1814 ConstructedInterpolants, 20 QuantifiedInterpolants, 11966 SizeOfPredicates, 83 NumberOfNonLiveVariables, 6593 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 46 InterpolantComputations, 14 PerfectInterpolantSequences, 1431/2450 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 08:12:40,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b963f3a-568a-43c6-943e-bad6e3196a82/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