./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loop-acceleration/array3.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_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/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_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loop-acceleration/array3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/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_fe8c70fa-7045-490a-92cd-b588a082db70/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 9dfb76d38495bc50f893b9a1fbc1c4079ae42ab458f1c235795d8ebc0da579ea --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:34:05,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:34:05,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:34:05,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:34:05,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:34:05,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:34:05,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:34:05,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:34:05,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:34:05,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:34:05,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:34:05,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:34:05,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:34:05,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:34:05,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:34:05,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:34:05,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:34:05,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:34:05,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:34:05,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:34:05,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:34:05,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:34:05,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:34:05,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:34:05,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:34:05,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:34:05,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:34:05,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:34:05,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:34:05,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:34:05,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:34:05,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:34:05,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:34:05,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:34:05,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:34:05,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:34:05,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:34:05,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:34:05,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:34:05,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:34:05,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:34:05,343 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 08:34:05,381 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:34:05,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:34:05,382 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:34:05,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:34:05,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:34:05,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:34:05,386 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:34:05,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:34:05,387 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:34:05,387 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 08:34:05,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:34:05,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:34:05,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:34:05,389 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 08:34:05,389 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 08:34:05,390 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 08:34:05,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:34:05,390 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 08:34:05,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:34:05,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:34:05,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:34:05,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:34:05,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:34:05,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:34:05,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:34:05,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:34:05,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:34:05,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:34:05,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:34:05,396 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_fe8c70fa-7045-490a-92cd-b588a082db70/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dfb76d38495bc50f893b9a1fbc1c4079ae42ab458f1c235795d8ebc0da579ea [2021-11-07 08:34:05,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:34:05,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:34:05,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:34:05,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:34:05,735 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:34:05,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/loop-acceleration/array3.i [2021-11-07 08:34:05,829 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/data/fab36b67f/9472cfaf205b453f9d31bbf3f37db73d/FLAGd2bd2bca3 [2021-11-07 08:34:06,285 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:34:06,285 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/sv-benchmarks/c/loop-acceleration/array3.i [2021-11-07 08:34:06,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/data/fab36b67f/9472cfaf205b453f9d31bbf3f37db73d/FLAGd2bd2bca3 [2021-11-07 08:34:06,675 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/data/fab36b67f/9472cfaf205b453f9d31bbf3f37db73d [2021-11-07 08:34:06,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:34:06,679 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 08:34:06,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:34:06,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:34:06,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:34:06,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:34:06" (1/1) ... [2021-11-07 08:34:06,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51528367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:06, skipping insertion in model container [2021-11-07 08:34:06,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:34:06" (1/1) ... [2021-11-07 08:34:06,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:34:06,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:34:06,885 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/sv-benchmarks/c/loop-acceleration/array3.i[846,859] [2021-11-07 08:34:06,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:34:06,908 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:34:06,923 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/sv-benchmarks/c/loop-acceleration/array3.i[846,859] [2021-11-07 08:34:06,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:34:06,945 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:34:06,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:06 WrapperNode [2021-11-07 08:34:06,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:34:06,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:34:06,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:34:06,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:34:06,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:06" (1/1) ... [2021-11-07 08:34:06,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:06" (1/1) ... [2021-11-07 08:34:06,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:06" (1/1) ... [2021-11-07 08:34:06,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:06" (1/1) ... [2021-11-07 08:34:06,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:06" (1/1) ... [2021-11-07 08:34:06,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:06" (1/1) ... [2021-11-07 08:34:06,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:06" (1/1) ... [2021-11-07 08:34:06,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:34:06,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:34:06,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:34:06,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:34:06,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:06" (1/1) ... [2021-11-07 08:34:06,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:34:07,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:07,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:34:07,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:34:07,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 08:34:07,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:34:07,089 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 08:34:07,090 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-07 08:34:07,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 08:34:07,092 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 08:34:07,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 08:34:07,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 08:34:07,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 08:34:07,093 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 08:34:07,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:34:07,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 08:34:07,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-07 08:34:07,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 08:34:07,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:34:07,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:34:07,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:34:07,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 08:34:07,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:34:07,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:34:07,345 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:34:07,345 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-07 08:34:07,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:34:07 BoogieIcfgContainer [2021-11-07 08:34:07,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:34:07,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:34:07,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:34:07,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:34:07,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:34:06" (1/3) ... [2021-11-07 08:34:07,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1690e1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:34:07, skipping insertion in model container [2021-11-07 08:34:07,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:34:06" (2/3) ... [2021-11-07 08:34:07,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1690e1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:34:07, skipping insertion in model container [2021-11-07 08:34:07,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:34:07" (3/3) ... [2021-11-07 08:34:07,358 INFO L111 eAbstractionObserver]: Analyzing ICFG array3.i [2021-11-07 08:34:07,364 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:34:07,365 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 08:34:07,418 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:34:07,425 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 08:34:07,426 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 08:34:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.631578947368421) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:34:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:34:07,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:07,449 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:07,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2055873827, now seen corresponding path program 1 times [2021-11-07 08:34:07,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:07,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255470027] [2021-11-07 08:34:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:07,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:07,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:07,721 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 08:34:07,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:07,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255470027] [2021-11-07 08:34:07,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255470027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:34:07,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:34:07,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:34:07,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444542032] [2021-11-07 08:34:07,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:34:07,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:34:07,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:34:07,779 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.631578947368421) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 08:34:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:07,946 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-07 08:34:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:34:07,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 08:34:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:07,957 INFO L225 Difference]: With dead ends: 30 [2021-11-07 08:34:07,957 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 08:34:07,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:34:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 08:34:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-07 08:34:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:34:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-07 08:34:08,005 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 8 [2021-11-07 08:34:08,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:08,006 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-07 08:34:08,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 08:34:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-07 08:34:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:34:08,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:08,008 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:08,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:34:08,008 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2055873828, now seen corresponding path program 1 times [2021-11-07 08:34:08,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:08,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235322627] [2021-11-07 08:34:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:08,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:08,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:08,203 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 08:34:08,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:08,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235322627] [2021-11-07 08:34:08,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235322627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:34:08,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:34:08,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:34:08,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323972819] [2021-11-07 08:34:08,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:34:08,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:08,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:34:08,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:34:08,207 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 08:34:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:08,325 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-11-07 08:34:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:34:08,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 08:34:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:08,328 INFO L225 Difference]: With dead ends: 31 [2021-11-07 08:34:08,329 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 08:34:08,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:34:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 08:34:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-07 08:34:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:34:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-07 08:34:08,342 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 8 [2021-11-07 08:34:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:08,342 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-07 08:34:08,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 08:34:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-07 08:34:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:34:08,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:08,344 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:08,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:34:08,349 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:08,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash 819443687, now seen corresponding path program 1 times [2021-11-07 08:34:08,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:08,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966622757] [2021-11-07 08:34:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:08,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:08,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:08,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:08,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966622757] [2021-11-07 08:34:08,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966622757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:08,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677905648] [2021-11-07 08:34:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:08,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:08,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:08,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:08,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:34:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:08,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:34:08,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:08,713 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 08:34:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:08,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677905648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:08,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:08,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-11-07 08:34:08,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835688140] [2021-11-07 08:34:08,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:34:08,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:34:08,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:34:08,887 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 08:34:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:09,058 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-11-07 08:34:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:34:09,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 12 [2021-11-07 08:34:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:09,064 INFO L225 Difference]: With dead ends: 48 [2021-11-07 08:34:09,064 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 08:34:09,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:34:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 08:34:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-11-07 08:34:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:34:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-11-07 08:34:09,086 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 12 [2021-11-07 08:34:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:09,086 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-11-07 08:34:09,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 08:34:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-11-07 08:34:09,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:34:09,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:09,093 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:09,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:09,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:09,312 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:09,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:09,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1406048302, now seen corresponding path program 1 times [2021-11-07 08:34:09,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:09,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316084496] [2021-11-07 08:34:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:09,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:09,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:34:09,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:09,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316084496] [2021-11-07 08:34:09,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316084496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:34:09,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:34:09,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:34:09,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619609259] [2021-11-07 08:34:09,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:34:09,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:09,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:34:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:34:09,435 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:34:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:09,566 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-11-07 08:34:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:34:09,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-07 08:34:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:09,568 INFO L225 Difference]: With dead ends: 52 [2021-11-07 08:34:09,568 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 08:34:09,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:34:09,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 08:34:09,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-11-07 08:34:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 42 states have internal predecessors, (45), 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 08:34:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-11-07 08:34:09,575 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 26 [2021-11-07 08:34:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:09,576 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-11-07 08:34:09,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:34:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-11-07 08:34:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:34:09,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:09,578 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:09,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:34:09,578 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:09,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1235906452, now seen corresponding path program 1 times [2021-11-07 08:34:09,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:09,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979986442] [2021-11-07 08:34:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:09,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:09,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:09,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-07 08:34:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:09,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:09,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979986442] [2021-11-07 08:34:09,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979986442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:09,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425215301] [2021-11-07 08:34:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:09,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:09,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:09,721 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:09,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:34:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:09,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:34:09,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:09,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425215301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:09,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:09,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-11-07 08:34:09,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441945281] [2021-11-07 08:34:09,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:34:09,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:09,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:34:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:34:09,932 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:34:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:10,046 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-11-07 08:34:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:34:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-11-07 08:34:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:10,048 INFO L225 Difference]: With dead ends: 79 [2021-11-07 08:34:10,048 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 08:34:10,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:34:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 08:34:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 53. [2021-11-07 08:34:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 46 states have internal predecessors, (49), 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 08:34:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-11-07 08:34:10,075 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 29 [2021-11-07 08:34:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:10,076 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-11-07 08:34:10,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:34:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-11-07 08:34:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 08:34:10,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:10,078 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:10,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:10,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:10,293 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:10,294 INFO L85 PathProgramCache]: Analyzing trace with hash 835273905, now seen corresponding path program 2 times [2021-11-07 08:34:10,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:10,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767902035] [2021-11-07 08:34:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:10,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:10,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:10,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-07 08:34:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:10,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:10,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767902035] [2021-11-07 08:34:10,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767902035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:10,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617130236] [2021-11-07 08:34:10,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:34:10,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:10,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:10,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:10,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:34:10,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 08:34:10,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:10,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:34:10,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:10,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-07 08:34:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:34:10,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617130236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:34:10,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:34:10,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-11-07 08:34:10,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937596730] [2021-11-07 08:34:10,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:34:10,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:10,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:34:10,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:34:10,773 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:34:10,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:10,836 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-11-07 08:34:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:34:10,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-07 08:34:10,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:10,838 INFO L225 Difference]: With dead ends: 52 [2021-11-07 08:34:10,838 INFO L226 Difference]: Without dead ends: 43 [2021-11-07 08:34:10,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:34:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-07 08:34:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-07 08:34:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 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 08:34:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-11-07 08:34:10,844 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 33 [2021-11-07 08:34:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:10,844 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-11-07 08:34:10,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:34:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-11-07 08:34:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 08:34:10,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:10,846 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:10,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:11,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:11,064 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:11,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1243890786, now seen corresponding path program 1 times [2021-11-07 08:34:11,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:11,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818093887] [2021-11-07 08:34:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:11,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:11,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:34:11,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:11,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818093887] [2021-11-07 08:34:11,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818093887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:11,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237121180] [2021-11-07 08:34:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:11,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:11,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:11,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:11,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:34:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:11,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:34:11,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:34:11,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237121180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:11,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:11,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-07 08:34:11,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259648610] [2021-11-07 08:34:11,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:34:11,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:11,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:34:11,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:34:11,499 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:34:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:11,697 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-11-07 08:34:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:34:11,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-11-07 08:34:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:11,699 INFO L225 Difference]: With dead ends: 69 [2021-11-07 08:34:11,699 INFO L226 Difference]: Without dead ends: 63 [2021-11-07 08:34:11,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:34:11,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-07 08:34:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-11-07 08:34:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.1) internal successors, (55), 51 states have internal predecessors, (55), 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 08:34:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-11-07 08:34:11,721 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 34 [2021-11-07 08:34:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:11,723 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-11-07 08:34:11,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:34:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-11-07 08:34:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 08:34:11,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:11,730 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:11,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-07 08:34:11,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:11,956 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:11,957 INFO L85 PathProgramCache]: Analyzing trace with hash 206075304, now seen corresponding path program 1 times [2021-11-07 08:34:11,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:11,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684004215] [2021-11-07 08:34:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:11,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:12,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:34:12,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:12,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684004215] [2021-11-07 08:34:12,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684004215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:12,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314352896] [2021-11-07 08:34:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:12,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:12,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:12,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:12,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:34:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:12,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:34:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:34:12,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314352896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:12,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:12,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-11-07 08:34:12,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557993022] [2021-11-07 08:34:12,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:34:12,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:12,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:34:12,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:34:12,334 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 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 08:34:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:12,449 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-11-07 08:34:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:34:12,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 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 41 [2021-11-07 08:34:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:12,452 INFO L225 Difference]: With dead ends: 73 [2021-11-07 08:34:12,452 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 08:34:12,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:34:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 08:34:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-11-07 08:34:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 55 states have internal predecessors, (59), 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 08:34:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-11-07 08:34:12,476 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 41 [2021-11-07 08:34:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:12,477 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-11-07 08:34:12,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 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 08:34:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-11-07 08:34:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:34:12,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:12,482 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:12,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:12,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 08:34:12,702 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:12,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1062762683, now seen corresponding path program 2 times [2021-11-07 08:34:12,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:12,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612046257] [2021-11-07 08:34:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:12,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:12,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:34:12,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:12,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612046257] [2021-11-07 08:34:12,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612046257] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:12,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711479457] [2021-11-07 08:34:12,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:34:12,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:12,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:12,814 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:12,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:34:12,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:34:12,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:12,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:34:12,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:34:13,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711479457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:13,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:13,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-11-07 08:34:13,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673677066] [2021-11-07 08:34:13,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:34:13,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:13,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:34:13,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:34:13,117 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 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 08:34:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:13,248 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-11-07 08:34:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:34:13,249 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 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 45 [2021-11-07 08:34:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:13,250 INFO L225 Difference]: With dead ends: 83 [2021-11-07 08:34:13,250 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 08:34:13,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:34:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 08:34:13,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-11-07 08:34:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 59 states have internal predecessors, (63), 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 08:34:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-11-07 08:34:13,256 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 45 [2021-11-07 08:34:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:13,257 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-11-07 08:34:13,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 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 08:34:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-11-07 08:34:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 08:34:13,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:13,258 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:13,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:13,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-07 08:34:13,484 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:13,485 INFO L85 PathProgramCache]: Analyzing trace with hash 632980066, now seen corresponding path program 3 times [2021-11-07 08:34:13,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:13,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91984000] [2021-11-07 08:34:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:13,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:13,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:34:13,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:13,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91984000] [2021-11-07 08:34:13,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91984000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:13,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085517136] [2021-11-07 08:34:13,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:34:13,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:13,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:13,632 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:13,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:34:13,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 08:34:13,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:13,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:34:13,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-07 08:34:14,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085517136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:14,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:14,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-11-07 08:34:14,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509955674] [2021-11-07 08:34:14,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:34:14,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:14,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:34:14,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:34:14,167 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 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 08:34:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:14,594 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-11-07 08:34:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:34:14,595 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 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 49 [2021-11-07 08:34:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:14,596 INFO L225 Difference]: With dead ends: 96 [2021-11-07 08:34:14,596 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 08:34:14,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:34:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 08:34:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-11-07 08:34:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 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 08:34:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-11-07 08:34:14,602 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 49 [2021-11-07 08:34:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:14,602 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-11-07 08:34:14,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 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 08:34:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-11-07 08:34:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:34:14,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:14,604 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:14,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:14,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:34:14,805 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:14,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:14,806 INFO L85 PathProgramCache]: Analyzing trace with hash -39068394, now seen corresponding path program 4 times [2021-11-07 08:34:14,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:14,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932017695] [2021-11-07 08:34:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:14,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:14,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:34:14,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:14,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932017695] [2021-11-07 08:34:14,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932017695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:14,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663578694] [2021-11-07 08:34:14,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:34:14,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:14,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:14,927 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:14,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:34:15,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:34:15,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:15,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:34:15,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:34:15,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663578694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:15,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:15,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-11-07 08:34:15,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44407674] [2021-11-07 08:34:15,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:34:15,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:34:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:34:15,361 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 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 08:34:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:15,531 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-11-07 08:34:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:34:15,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 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 57 [2021-11-07 08:34:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:15,533 INFO L225 Difference]: With dead ends: 102 [2021-11-07 08:34:15,533 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 08:34:15,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:34:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 08:34:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 72. [2021-11-07 08:34:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 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 08:34:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-11-07 08:34:15,539 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 57 [2021-11-07 08:34:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:15,539 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-11-07 08:34:15,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 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 08:34:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-11-07 08:34:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:34:15,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:15,541 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:15,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:15,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:15,766 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash -738847565, now seen corresponding path program 5 times [2021-11-07 08:34:15,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:15,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606490904] [2021-11-07 08:34:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:15,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:15,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:34:15,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:15,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606490904] [2021-11-07 08:34:15,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606490904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:15,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333690186] [2021-11-07 08:34:15,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:34:15,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:15,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:15,991 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:15,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:34:16,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-07 08:34:16,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:16,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:34:16,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:34:16,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333690186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:16,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:16,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-11-07 08:34:16,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696866833] [2021-11-07 08:34:16,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:34:16,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:16,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:34:16,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:34:16,416 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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 08:34:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:16,551 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-11-07 08:34:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:34:16,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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 61 [2021-11-07 08:34:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:16,553 INFO L225 Difference]: With dead ends: 112 [2021-11-07 08:34:16,554 INFO L226 Difference]: Without dead ends: 112 [2021-11-07 08:34:16,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:34:16,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-07 08:34:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 76. [2021-11-07 08:34:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 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 08:34:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-11-07 08:34:16,563 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2021-11-07 08:34:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:16,563 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-11-07 08:34:16,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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 08:34:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-11-07 08:34:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:34:16,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:16,565 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:16,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:16,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:16,788 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2064566832, now seen corresponding path program 6 times [2021-11-07 08:34:16,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:16,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142981350] [2021-11-07 08:34:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:16,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:16,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 08:34:16,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:16,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142981350] [2021-11-07 08:34:16,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142981350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:16,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409249670] [2021-11-07 08:34:16,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:34:16,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:16,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:16,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:16,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:34:17,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-07 08:34:17,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:17,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:34:17,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-07 08:34:17,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409249670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:17,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:17,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2021-11-07 08:34:17,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862714104] [2021-11-07 08:34:17,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:34:17,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:34:17,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:34:17,625 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 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 08:34:18,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:18,110 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2021-11-07 08:34:18,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:34:18,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 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 65 [2021-11-07 08:34:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:18,111 INFO L225 Difference]: With dead ends: 125 [2021-11-07 08:34:18,112 INFO L226 Difference]: Without dead ends: 125 [2021-11-07 08:34:18,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=451, Invalid=809, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:34:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-07 08:34:18,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 80. [2021-11-07 08:34:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 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 08:34:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-11-07 08:34:18,115 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 65 [2021-11-07 08:34:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:18,116 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-11-07 08:34:18,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 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 08:34:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-11-07 08:34:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 08:34:18,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:18,117 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:18,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:18,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:18,318 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:18,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1094627452, now seen corresponding path program 7 times [2021-11-07 08:34:18,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:18,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415061533] [2021-11-07 08:34:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:18,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:18,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 08:34:18,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:18,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415061533] [2021-11-07 08:34:18,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415061533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:18,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796206839] [2021-11-07 08:34:18,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:34:18,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:18,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:18,476 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:18,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:34:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:18,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:34:18,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 08:34:18,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796206839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:18,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:18,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-11-07 08:34:18,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287428807] [2021-11-07 08:34:18,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:34:18,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:34:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:34:18,919 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 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 08:34:19,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:19,065 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2021-11-07 08:34:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:34:19,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 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 73 [2021-11-07 08:34:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:19,066 INFO L225 Difference]: With dead ends: 131 [2021-11-07 08:34:19,066 INFO L226 Difference]: Without dead ends: 131 [2021-11-07 08:34:19,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:34:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-07 08:34:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 84. [2021-11-07 08:34:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 79 states have internal predecessors, (81), 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 08:34:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-07 08:34:19,070 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 73 [2021-11-07 08:34:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:19,070 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-07 08:34:19,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 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 08:34:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-07 08:34:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:34:19,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:19,071 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:19,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:19,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:34:19,292 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1209357023, now seen corresponding path program 8 times [2021-11-07 08:34:19,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:19,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342133754] [2021-11-07 08:34:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:19,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:19,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 08:34:19,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:19,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342133754] [2021-11-07 08:34:19,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342133754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:19,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504194994] [2021-11-07 08:34:19,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:34:19,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:19,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:19,488 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:19,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:34:19,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:34:19,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:19,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:34:19,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 08:34:19,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504194994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:19,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:19,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-11-07 08:34:19,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039530655] [2021-11-07 08:34:19,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:34:19,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:19,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:34:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:34:19,988 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 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 08:34:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:20,128 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2021-11-07 08:34:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:34:20,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 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 77 [2021-11-07 08:34:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:20,130 INFO L225 Difference]: With dead ends: 141 [2021-11-07 08:34:20,130 INFO L226 Difference]: Without dead ends: 141 [2021-11-07 08:34:20,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:34:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-07 08:34:20,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 88. [2021-11-07 08:34:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 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 08:34:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-11-07 08:34:20,136 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 77 [2021-11-07 08:34:20,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:20,137 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-11-07 08:34:20,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 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 08:34:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-11-07 08:34:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 08:34:20,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:20,141 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:20,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:20,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:34:20,355 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:20,356 INFO L85 PathProgramCache]: Analyzing trace with hash 465695806, now seen corresponding path program 9 times [2021-11-07 08:34:20,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:20,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493728192] [2021-11-07 08:34:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:20,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:20,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 08:34:20,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:20,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493728192] [2021-11-07 08:34:20,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493728192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:20,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873370192] [2021-11-07 08:34:20,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:34:20,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:20,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:20,540 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:20,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:34:20,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 08:34:20,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:34:20,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 37 proven. 45 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-07 08:34:21,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873370192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:21,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:21,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 27 [2021-11-07 08:34:21,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448781774] [2021-11-07 08:34:21,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:34:21,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:34:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:34:21,294 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 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 08:34:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:22,009 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2021-11-07 08:34:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:34:22,010 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 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 81 [2021-11-07 08:34:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:22,011 INFO L225 Difference]: With dead ends: 154 [2021-11-07 08:34:22,012 INFO L226 Difference]: Without dead ends: 154 [2021-11-07 08:34:22,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=653, Invalid=1153, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:34:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-07 08:34:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 95. [2021-11-07 08:34:22,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 90 states have internal predecessors, (92), 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 08:34:22,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-11-07 08:34:22,017 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 81 [2021-11-07 08:34:22,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:22,018 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-11-07 08:34:22,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 26 states have internal predecessors, (94), 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 08:34:22,018 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-11-07 08:34:22,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 08:34:22,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:22,019 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:22,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-07 08:34:22,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:34:22,240 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:22,241 INFO L85 PathProgramCache]: Analyzing trace with hash -462280608, now seen corresponding path program 2 times [2021-11-07 08:34:22,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:22,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146632276] [2021-11-07 08:34:22,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:22,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:22,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-07 08:34:22,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:22,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146632276] [2021-11-07 08:34:22,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146632276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:34:22,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:34:22,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 08:34:22,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143962739] [2021-11-07 08:34:22,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:34:22,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:22,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:34:22,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:34:22,325 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:34:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:22,400 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-11-07 08:34:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:34:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-11-07 08:34:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:22,402 INFO L225 Difference]: With dead ends: 93 [2021-11-07 08:34:22,402 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 08:34:22,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:34:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 08:34:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-07 08:34:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 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 08:34:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-11-07 08:34:22,406 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 90 [2021-11-07 08:34:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:22,407 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-11-07 08:34:22,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:34:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-11-07 08:34:22,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 08:34:22,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:22,408 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:22,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:34:22,409 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:22,409 INFO L85 PathProgramCache]: Analyzing trace with hash 677858546, now seen corresponding path program 10 times [2021-11-07 08:34:22,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:22,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416210725] [2021-11-07 08:34:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:22,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:22,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-07 08:34:22,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:22,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416210725] [2021-11-07 08:34:22,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416210725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:22,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593618618] [2021-11-07 08:34:22,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:34:22,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:22,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:22,632 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:22,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:34:23,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:34:23,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:23,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:34:23,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-07 08:34:23,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593618618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:23,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:23,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-11-07 08:34:23,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661538747] [2021-11-07 08:34:23,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:34:23,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:34:23,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:34:23,352 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 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 08:34:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:23,520 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2021-11-07 08:34:23,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:34:23,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 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 89 [2021-11-07 08:34:23,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:23,521 INFO L225 Difference]: With dead ends: 145 [2021-11-07 08:34:23,522 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 08:34:23,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:34:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 08:34:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 94. [2021-11-07 08:34:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 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 08:34:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-11-07 08:34:23,525 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2021-11-07 08:34:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:23,525 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-11-07 08:34:23,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 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 08:34:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-11-07 08:34:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 08:34:23,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:23,526 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:23,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:23,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:34:23,727 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:23,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:23,727 INFO L85 PathProgramCache]: Analyzing trace with hash -580661105, now seen corresponding path program 11 times [2021-11-07 08:34:23,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:23,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760218202] [2021-11-07 08:34:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:23,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:23,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-07 08:34:23,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:23,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760218202] [2021-11-07 08:34:23,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760218202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:23,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161366340] [2021-11-07 08:34:23,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:34:23,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:23,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:23,958 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:23,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:34:24,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-07 08:34:24,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:24,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:34:24,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-07 08:34:24,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161366340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:24,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:24,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-11-07 08:34:24,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992393241] [2021-11-07 08:34:24,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:34:24,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:24,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:34:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:34:24,742 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 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 08:34:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:24,915 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-11-07 08:34:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:34:24,915 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 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 93 [2021-11-07 08:34:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:24,917 INFO L225 Difference]: With dead ends: 154 [2021-11-07 08:34:24,917 INFO L226 Difference]: Without dead ends: 154 [2021-11-07 08:34:24,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:34:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-07 08:34:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2021-11-07 08:34:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 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 08:34:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-11-07 08:34:24,923 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 93 [2021-11-07 08:34:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:24,923 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-11-07 08:34:24,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 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 08:34:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-11-07 08:34:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:34:24,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:24,925 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:24,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:25,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:25,140 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:25,141 INFO L85 PathProgramCache]: Analyzing trace with hash -217367124, now seen corresponding path program 12 times [2021-11-07 08:34:25,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:25,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054428275] [2021-11-07 08:34:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:25,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:25,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-07 08:34:25,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:25,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054428275] [2021-11-07 08:34:25,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054428275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:25,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345524496] [2021-11-07 08:34:25,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:34:25,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:25,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:25,412 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:25,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:34:25,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 08:34:25,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:25,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:34:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 46 proven. 66 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-11-07 08:34:26,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345524496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:26,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:26,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 31 [2021-11-07 08:34:26,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164177058] [2021-11-07 08:34:26,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:34:26,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:26,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:34:26,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=585, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:34:26,566 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 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 08:34:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:27,278 INFO L93 Difference]: Finished difference Result 166 states and 168 transitions. [2021-11-07 08:34:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:34:27,278 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 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 97 [2021-11-07 08:34:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:27,279 INFO L225 Difference]: With dead ends: 166 [2021-11-07 08:34:27,280 INFO L226 Difference]: Without dead ends: 166 [2021-11-07 08:34:27,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=893, Invalid=1557, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:34:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-07 08:34:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 106. [2021-11-07 08:34:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 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 08:34:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-11-07 08:34:27,285 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 97 [2021-11-07 08:34:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:27,286 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-11-07 08:34:27,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 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 08:34:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-11-07 08:34:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 08:34:27,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:27,288 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:27,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:27,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:27,510 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:27,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:27,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1211913568, now seen corresponding path program 13 times [2021-11-07 08:34:27,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:27,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994404943] [2021-11-07 08:34:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:27,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-07 08:34:27,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:27,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994404943] [2021-11-07 08:34:27,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994404943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:27,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464820550] [2021-11-07 08:34:27,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:34:27,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:27,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:27,786 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:27,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:34:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:28,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 08:34:28,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-07 08:34:28,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464820550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:28,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:28,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-11-07 08:34:28,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570820597] [2021-11-07 08:34:28,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:34:28,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:28,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:34:28,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:34:28,452 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 21 states have internal predecessors, (84), 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 08:34:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:28,656 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2021-11-07 08:34:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 08:34:28,657 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 21 states have internal predecessors, (84), 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 105 [2021-11-07 08:34:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:28,658 INFO L225 Difference]: With dead ends: 171 [2021-11-07 08:34:28,659 INFO L226 Difference]: Without dead ends: 171 [2021-11-07 08:34:28,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:34:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-07 08:34:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 110. [2021-11-07 08:34:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 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 08:34:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2021-11-07 08:34:28,664 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 105 [2021-11-07 08:34:28,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:28,665 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2021-11-07 08:34:28,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 21 states have internal predecessors, (84), 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 08:34:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2021-11-07 08:34:28,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 08:34:28,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:28,667 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:28,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:28,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:28,888 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:28,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:28,888 INFO L85 PathProgramCache]: Analyzing trace with hash -369099011, now seen corresponding path program 14 times [2021-11-07 08:34:28,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:28,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416527698] [2021-11-07 08:34:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:28,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:29,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-07 08:34:29,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:29,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416527698] [2021-11-07 08:34:29,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416527698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:29,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874523756] [2021-11-07 08:34:29,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:34:29,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:29,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:29,148 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:29,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:34:29,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:34:29,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:29,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:34:29,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-07 08:34:29,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874523756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:29,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:29,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-11-07 08:34:29,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111419601] [2021-11-07 08:34:29,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:34:29,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:29,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:34:29,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:34:29,873 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 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 08:34:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:30,084 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2021-11-07 08:34:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:34:30,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 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 109 [2021-11-07 08:34:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:30,087 INFO L225 Difference]: With dead ends: 180 [2021-11-07 08:34:30,087 INFO L226 Difference]: Without dead ends: 180 [2021-11-07 08:34:30,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:34:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-07 08:34:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 114. [2021-11-07 08:34:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 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 08:34:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-11-07 08:34:30,096 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 109 [2021-11-07 08:34:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:30,097 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-11-07 08:34:30,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 states have internal predecessors, (88), 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 08:34:30,097 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-11-07 08:34:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 08:34:30,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:30,099 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:30,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:30,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 08:34:30,312 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:30,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:30,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1215009306, now seen corresponding path program 15 times [2021-11-07 08:34:30,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:30,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910108682] [2021-11-07 08:34:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:30,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:30,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-07 08:34:30,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:30,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910108682] [2021-11-07 08:34:30,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910108682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:30,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564050564] [2021-11-07 08:34:30,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:34:30,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:30,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:30,590 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:30,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:34:31,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 08:34:31,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:31,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:34:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 55 proven. 91 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-11-07 08:34:31,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564050564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:31,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:31,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 35 [2021-11-07 08:34:31,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680904050] [2021-11-07 08:34:31,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 08:34:31,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:31,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 08:34:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=738, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:34:31,595 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 35 states, 35 states have (on average 3.6) internal successors, (126), 34 states have internal predecessors, (126), 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 08:34:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:32,375 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2021-11-07 08:34:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:34:32,376 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 34 states have internal predecessors, (126), 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 113 [2021-11-07 08:34:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:32,377 INFO L225 Difference]: With dead ends: 192 [2021-11-07 08:34:32,377 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 08:34:32,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2021, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 08:34:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 08:34:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 122. [2021-11-07 08:34:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 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 08:34:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2021-11-07 08:34:32,385 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 113 [2021-11-07 08:34:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:32,385 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2021-11-07 08:34:32,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 34 states have internal predecessors, (126), 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 08:34:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2021-11-07 08:34:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 08:34:32,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:32,387 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:32,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-07 08:34:32,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:34:32,624 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash 10414286, now seen corresponding path program 16 times [2021-11-07 08:34:32,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:32,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242863043] [2021-11-07 08:34:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:32,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:32,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-07 08:34:32,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:32,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242863043] [2021-11-07 08:34:32,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242863043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:32,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807986348] [2021-11-07 08:34:32,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:34:32,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:32,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:32,937 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:32,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:34:33,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:34:33,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:33,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:34:33,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-07 08:34:33,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807986348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:33,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:33,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-11-07 08:34:33,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959852065] [2021-11-07 08:34:33,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 08:34:33,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 08:34:33,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:34:33,950 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 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 08:34:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:34,122 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2021-11-07 08:34:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:34:34,123 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 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 121 [2021-11-07 08:34:34,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:34,124 INFO L225 Difference]: With dead ends: 197 [2021-11-07 08:34:34,124 INFO L226 Difference]: Without dead ends: 197 [2021-11-07 08:34:34,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:34:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-07 08:34:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 126. [2021-11-07 08:34:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 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 08:34:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-11-07 08:34:34,129 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 121 [2021-11-07 08:34:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:34,129 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-11-07 08:34:34,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 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 08:34:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-11-07 08:34:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 08:34:34,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:34,131 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:34,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:34,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 08:34:34,344 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:34,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1478342763, now seen corresponding path program 17 times [2021-11-07 08:34:34,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:34,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640890587] [2021-11-07 08:34:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:34,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:34,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-07 08:34:34,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:34,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640890587] [2021-11-07 08:34:34,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640890587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:34,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498173743] [2021-11-07 08:34:34,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:34:34,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:34,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:34,656 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:34,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:34:35,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-07 08:34:35,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:35,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 08:34:35,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-07 08:34:35,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498173743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:35,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:35,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-11-07 08:34:35,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725162456] [2021-11-07 08:34:35,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:34:35,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:35,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:34:35,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:34:35,719 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 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 08:34:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:35,942 INFO L93 Difference]: Finished difference Result 206 states and 207 transitions. [2021-11-07 08:34:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:34:35,943 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 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 125 [2021-11-07 08:34:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:35,944 INFO L225 Difference]: With dead ends: 206 [2021-11-07 08:34:35,944 INFO L226 Difference]: Without dead ends: 206 [2021-11-07 08:34:35,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:34:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-07 08:34:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 130. [2021-11-07 08:34:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 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 08:34:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2021-11-07 08:34:35,950 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2021-11-07 08:34:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:35,950 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2021-11-07 08:34:35,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 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 08:34:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2021-11-07 08:34:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-07 08:34:35,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:35,951 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:35,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:36,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 08:34:36,152 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:36,153 INFO L85 PathProgramCache]: Analyzing trace with hash 776040840, now seen corresponding path program 18 times [2021-11-07 08:34:36,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:36,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718121499] [2021-11-07 08:34:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:36,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:36,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-07 08:34:36,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:36,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718121499] [2021-11-07 08:34:36,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718121499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:36,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93402796] [2021-11-07 08:34:36,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:34:36,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:36,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:36,536 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:36,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:34:37,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-07 08:34:37,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:37,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:34:37,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 64 proven. 120 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2021-11-07 08:34:38,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93402796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:38,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:38,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 39 [2021-11-07 08:34:38,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855309717] [2021-11-07 08:34:38,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 08:34:38,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:38,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 08:34:38,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=908, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:34:38,216 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 39 states, 39 states have (on average 3.641025641025641) internal successors, (142), 38 states have internal predecessors, (142), 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 08:34:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:39,210 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2021-11-07 08:34:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:34:39,210 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.641025641025641) internal successors, (142), 38 states have internal predecessors, (142), 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 129 [2021-11-07 08:34:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:39,211 INFO L225 Difference]: With dead ends: 218 [2021-11-07 08:34:39,212 INFO L226 Difference]: Without dead ends: 218 [2021-11-07 08:34:39,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1487, Invalid=2545, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 08:34:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-07 08:34:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 138. [2021-11-07 08:34:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 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 08:34:39,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2021-11-07 08:34:39,219 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 129 [2021-11-07 08:34:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:39,220 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2021-11-07 08:34:39,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.641025641025641) internal successors, (142), 38 states have internal predecessors, (142), 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 08:34:39,220 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2021-11-07 08:34:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 08:34:39,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:39,222 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:39,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-07 08:34:39,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 08:34:39,436 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1465022660, now seen corresponding path program 19 times [2021-11-07 08:34:39,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:39,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299423955] [2021-11-07 08:34:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:39,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:39,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-07 08:34:39,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:39,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299423955] [2021-11-07 08:34:39,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299423955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:39,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945298382] [2021-11-07 08:34:39,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:34:39,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:39,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:39,767 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:39,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 08:34:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:40,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 08:34:40,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-07 08:34:40,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945298382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:40,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:40,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-11-07 08:34:40,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590457087] [2021-11-07 08:34:40,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 08:34:40,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 08:34:40,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:34:40,715 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 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 08:34:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:41,007 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2021-11-07 08:34:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:34:41,009 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 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 137 [2021-11-07 08:34:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:41,011 INFO L225 Difference]: With dead ends: 223 [2021-11-07 08:34:41,011 INFO L226 Difference]: Without dead ends: 223 [2021-11-07 08:34:41,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:34:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-07 08:34:41,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 142. [2021-11-07 08:34:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 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 08:34:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2021-11-07 08:34:41,017 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2021-11-07 08:34:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:41,018 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2021-11-07 08:34:41,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 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 08:34:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2021-11-07 08:34:41,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 08:34:41,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:41,048 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:41,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 08:34:41,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:41,260 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash 383483097, now seen corresponding path program 20 times [2021-11-07 08:34:41,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:41,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038738434] [2021-11-07 08:34:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:41,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:41,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-07 08:34:41,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:41,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038738434] [2021-11-07 08:34:41,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038738434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:41,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035279710] [2021-11-07 08:34:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:34:41,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:41,656 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:41,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 08:34:42,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:34:42,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:34:42,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-07 08:34:42,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035279710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:42,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:42,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-11-07 08:34:42,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884565967] [2021-11-07 08:34:42,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 08:34:42,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:42,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 08:34:42,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:34:42,977 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 28 states have internal predecessors, (112), 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 08:34:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:43,244 INFO L93 Difference]: Finished difference Result 232 states and 233 transitions. [2021-11-07 08:34:43,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 08:34:43,245 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 28 states have internal predecessors, (112), 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 141 [2021-11-07 08:34:43,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:43,246 INFO L225 Difference]: With dead ends: 232 [2021-11-07 08:34:43,247 INFO L226 Difference]: Without dead ends: 232 [2021-11-07 08:34:43,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:34:43,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-07 08:34:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 146. [2021-11-07 08:34:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 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 08:34:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2021-11-07 08:34:43,254 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 141 [2021-11-07 08:34:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:43,255 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2021-11-07 08:34:43,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 28 states have internal predecessors, (112), 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 08:34:43,255 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2021-11-07 08:34:43,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 08:34:43,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:43,260 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:43,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:43,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:43,486 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:43,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:43,486 INFO L85 PathProgramCache]: Analyzing trace with hash 732650486, now seen corresponding path program 21 times [2021-11-07 08:34:43,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:43,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847308762] [2021-11-07 08:34:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:43,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:43,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-07 08:34:43,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:43,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847308762] [2021-11-07 08:34:43,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847308762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:43,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985024294] [2021-11-07 08:34:43,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:34:43,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:43,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:44,000 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:44,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 08:34:44,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 08:34:44,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:44,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:34:44,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 73 proven. 153 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2021-11-07 08:34:45,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985024294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:45,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:45,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 15] total 43 [2021-11-07 08:34:45,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687666925] [2021-11-07 08:34:45,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 08:34:45,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:45,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 08:34:45,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1095, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:34:45,480 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 42 states have internal predecessors, (158), 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 08:34:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:46,783 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2021-11-07 08:34:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 08:34:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 42 states have internal predecessors, (158), 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 145 [2021-11-07 08:34:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:46,787 INFO L225 Difference]: With dead ends: 244 [2021-11-07 08:34:46,787 INFO L226 Difference]: Without dead ends: 244 [2021-11-07 08:34:46,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1841, Invalid=3129, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 08:34:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-07 08:34:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 154. [2021-11-07 08:34:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 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 08:34:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2021-11-07 08:34:46,797 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 145 [2021-11-07 08:34:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:46,797 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2021-11-07 08:34:46,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 42 states have internal predecessors, (158), 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 08:34:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2021-11-07 08:34:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-07 08:34:46,799 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:46,799 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:46,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:47,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:34:47,024 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1404653398, now seen corresponding path program 22 times [2021-11-07 08:34:47,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:47,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302255777] [2021-11-07 08:34:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:47,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:47,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 08:34:47,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:47,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302255777] [2021-11-07 08:34:47,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302255777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:47,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075322534] [2021-11-07 08:34:47,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:34:47,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:47,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:47,512 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:47,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 08:34:49,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:34:49,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:49,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 08:34:49,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 08:34:50,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075322534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:50,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:50,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-11-07 08:34:50,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422976743] [2021-11-07 08:34:50,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:34:50,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:50,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:34:50,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:34:50,134 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 30 states have internal predecessors, (120), 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 08:34:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:50,408 INFO L93 Difference]: Finished difference Result 249 states and 250 transitions. [2021-11-07 08:34:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:34:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 30 states have internal predecessors, (120), 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 153 [2021-11-07 08:34:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:50,410 INFO L225 Difference]: With dead ends: 249 [2021-11-07 08:34:50,410 INFO L226 Difference]: Without dead ends: 249 [2021-11-07 08:34:50,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:34:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-07 08:34:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 158. [2021-11-07 08:34:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 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 08:34:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2021-11-07 08:34:50,417 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 153 [2021-11-07 08:34:50,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:50,417 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2021-11-07 08:34:50,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 30 states have internal predecessors, (120), 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 08:34:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2021-11-07 08:34:50,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 08:34:50,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:50,419 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:50,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:50,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:50,632 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:50,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:50,632 INFO L85 PathProgramCache]: Analyzing trace with hash 706202695, now seen corresponding path program 23 times [2021-11-07 08:34:50,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:50,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149579114] [2021-11-07 08:34:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:50,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:51,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1621 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 08:34:51,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:51,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149579114] [2021-11-07 08:34:51,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149579114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:51,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304532169] [2021-11-07 08:34:51,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:34:51,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:51,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:51,096 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:51,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 08:34:52,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-11-07 08:34:52,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:52,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 08:34:52,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1621 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 08:34:52,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304532169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:52,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:52,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-11-07 08:34:52,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153129660] [2021-11-07 08:34:52,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 08:34:52,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 08:34:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:34:52,852 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 32 states, 32 states have (on average 3.875) internal successors, (124), 31 states have internal predecessors, (124), 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 08:34:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:53,134 INFO L93 Difference]: Finished difference Result 258 states and 259 transitions. [2021-11-07 08:34:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 08:34:53,134 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.875) internal successors, (124), 31 states have internal predecessors, (124), 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 157 [2021-11-07 08:34:53,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:53,136 INFO L225 Difference]: With dead ends: 258 [2021-11-07 08:34:53,136 INFO L226 Difference]: Without dead ends: 258 [2021-11-07 08:34:53,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:34:53,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-07 08:34:53,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 162. [2021-11-07 08:34:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 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 08:34:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2021-11-07 08:34:53,142 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 157 [2021-11-07 08:34:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:53,143 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2021-11-07 08:34:53,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.875) internal successors, (124), 31 states have internal predecessors, (124), 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 08:34:53,143 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2021-11-07 08:34:53,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-07 08:34:53,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:53,144 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:53,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:53,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:53,360 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:53,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:53,360 INFO L85 PathProgramCache]: Analyzing trace with hash -595078812, now seen corresponding path program 24 times [2021-11-07 08:34:53,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:53,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547828307] [2021-11-07 08:34:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:53,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:53,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 08:34:53,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:53,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547828307] [2021-11-07 08:34:53,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547828307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:53,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765398107] [2021-11-07 08:34:53,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:34:53,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:53,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:53,853 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:53,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 08:34:55,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-07 08:34:55,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:34:55,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:34:55,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 82 proven. 190 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2021-11-07 08:34:56,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765398107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:56,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:56,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16] total 47 [2021-11-07 08:34:56,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532757347] [2021-11-07 08:34:56,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 08:34:56,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 08:34:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=1299, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 08:34:56,351 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 47 states, 47 states have (on average 3.702127659574468) internal successors, (174), 46 states have internal predecessors, (174), 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 08:34:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:57,612 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2021-11-07 08:34:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 08:34:57,613 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.702127659574468) internal successors, (174), 46 states have internal predecessors, (174), 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 161 [2021-11-07 08:34:57,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:57,615 INFO L225 Difference]: With dead ends: 270 [2021-11-07 08:34:57,615 INFO L226 Difference]: Without dead ends: 270 [2021-11-07 08:34:57,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2233, Invalid=3773, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 08:34:57,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-07 08:34:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 170. [2021-11-07 08:34:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 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 08:34:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2021-11-07 08:34:57,623 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 161 [2021-11-07 08:34:57,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:57,624 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2021-11-07 08:34:57,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.702127659574468) internal successors, (174), 46 states have internal predecessors, (174), 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 08:34:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2021-11-07 08:34:57,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 08:34:57,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:57,626 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:57,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:57,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 08:34:57,840 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:34:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash 738780440, now seen corresponding path program 25 times [2021-11-07 08:34:57,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:57,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814641176] [2021-11-07 08:34:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:57,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:58,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:34:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1884 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-07 08:34:58,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:58,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814641176] [2021-11-07 08:34:58,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814641176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:58,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688796406] [2021-11-07 08:34:58,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:34:58,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:58,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:58,393 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:58,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 08:34:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:59,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 08:34:59,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1884 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-07 08:34:59,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688796406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:59,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:59,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-11-07 08:34:59,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410253206] [2021-11-07 08:34:59,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 08:34:59,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 08:34:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:34:59,798 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 33 states have internal predecessors, (132), 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 08:35:00,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:00,145 INFO L93 Difference]: Finished difference Result 275 states and 276 transitions. [2021-11-07 08:35:00,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:35:00,146 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 33 states have internal predecessors, (132), 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 169 [2021-11-07 08:35:00,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:00,148 INFO L225 Difference]: With dead ends: 275 [2021-11-07 08:35:00,148 INFO L226 Difference]: Without dead ends: 275 [2021-11-07 08:35:00,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:35:00,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-07 08:35:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 174. [2021-11-07 08:35:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 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 08:35:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2021-11-07 08:35:00,157 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 169 [2021-11-07 08:35:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:00,157 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2021-11-07 08:35:00,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 33 states have internal predecessors, (132), 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 08:35:00,158 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2021-11-07 08:35:00,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-07 08:35:00,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:00,159 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:00,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:00,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 08:35:00,372 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:35:00,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1248929461, now seen corresponding path program 26 times [2021-11-07 08:35:00,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:00,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671795365] [2021-11-07 08:35:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:00,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:00,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:35:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2001 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-07 08:35:00,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:00,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671795365] [2021-11-07 08:35:00,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671795365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:00,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044885547] [2021-11-07 08:35:00,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:35:00,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:00,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:00,942 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:00,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 08:35:01,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:35:01,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:01,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 08:35:01,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2001 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-07 08:35:02,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044885547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:02,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:02,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-11-07 08:35:02,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150808355] [2021-11-07 08:35:02,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 08:35:02,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:02,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 08:35:02,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:35:02,361 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 34 states have internal predecessors, (136), 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 08:35:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:02,666 INFO L93 Difference]: Finished difference Result 284 states and 285 transitions. [2021-11-07 08:35:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:35:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 34 states have internal predecessors, (136), 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 173 [2021-11-07 08:35:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:02,669 INFO L225 Difference]: With dead ends: 284 [2021-11-07 08:35:02,669 INFO L226 Difference]: Without dead ends: 284 [2021-11-07 08:35:02,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:35:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-07 08:35:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 178. [2021-11-07 08:35:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 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 08:35:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2021-11-07 08:35:02,676 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2021-11-07 08:35:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:02,677 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2021-11-07 08:35:02,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 34 states have internal predecessors, (136), 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 08:35:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2021-11-07 08:35:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-07 08:35:02,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:02,679 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:02,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:02,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 08:35:02,892 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:35:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1854582318, now seen corresponding path program 27 times [2021-11-07 08:35:02,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:02,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698872581] [2021-11-07 08:35:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:02,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:03,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:35:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-07 08:35:03,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:03,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698872581] [2021-11-07 08:35:03,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698872581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:03,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607543326] [2021-11-07 08:35:03,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:35:03,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:03,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:03,452 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:03,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 08:35:04,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-07 08:35:04,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:04,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 08:35:04,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 91 proven. 231 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2021-11-07 08:35:05,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607543326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:05,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:05,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17] total 51 [2021-11-07 08:35:05,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408732397] [2021-11-07 08:35:05,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 08:35:05,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:05,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 08:35:05,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1030, Invalid=1520, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 08:35:05,418 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 51 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 50 states have internal predecessors, (190), 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 08:35:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:06,973 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2021-11-07 08:35:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 08:35:06,973 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 50 states have internal predecessors, (190), 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 177 [2021-11-07 08:35:06,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:06,976 INFO L225 Difference]: With dead ends: 296 [2021-11-07 08:35:06,976 INFO L226 Difference]: Without dead ends: 296 [2021-11-07 08:35:06,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2663, Invalid=4477, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 08:35:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-07 08:35:06,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 186. [2021-11-07 08:35:06,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 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 08:35:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2021-11-07 08:35:06,987 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 177 [2021-11-07 08:35:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:06,988 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2021-11-07 08:35:06,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 50 states have internal predecessors, (190), 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 08:35:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2021-11-07 08:35:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-07 08:35:06,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:06,990 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:07,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-07 08:35:07,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:07,216 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:35:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1655528314, now seen corresponding path program 28 times [2021-11-07 08:35:07,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:07,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834191029] [2021-11-07 08:35:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:07,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:07,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:35:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-07 08:35:07,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:07,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834191029] [2021-11-07 08:35:07,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834191029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:07,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840996894] [2021-11-07 08:35:07,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:35:07,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:07,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:07,898 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:07,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 08:35:10,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:35:10,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:10,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 08:35:10,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-07 08:35:10,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840996894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:10,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:10,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-11-07 08:35:10,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278759093] [2021-11-07 08:35:10,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 08:35:10,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:10,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 08:35:10,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:35:10,894 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 36 states have internal predecessors, (144), 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 08:35:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:11,270 INFO L93 Difference]: Finished difference Result 301 states and 302 transitions. [2021-11-07 08:35:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 08:35:11,270 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 36 states have internal predecessors, (144), 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 185 [2021-11-07 08:35:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:11,271 INFO L225 Difference]: With dead ends: 301 [2021-11-07 08:35:11,271 INFO L226 Difference]: Without dead ends: 301 [2021-11-07 08:35:11,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:35:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-07 08:35:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 190. [2021-11-07 08:35:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 states have internal predecessors, (188), 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 08:35:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2021-11-07 08:35:11,278 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2021-11-07 08:35:11,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:11,278 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2021-11-07 08:35:11,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 36 states have internal predecessors, (144), 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 08:35:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2021-11-07 08:35:11,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-07 08:35:11,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:11,280 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:11,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:11,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:11,508 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:35:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2059006941, now seen corresponding path program 29 times [2021-11-07 08:35:11,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:11,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190804864] [2021-11-07 08:35:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:11,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:12,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:35:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2421 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-07 08:35:12,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:12,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190804864] [2021-11-07 08:35:12,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190804864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:12,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251135951] [2021-11-07 08:35:12,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:35:12,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:12,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:12,104 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:12,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 08:35:15,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-11-07 08:35:15,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 08:35:15,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2421 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-07 08:35:15,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251135951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:15,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:15,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-11-07 08:35:15,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620213613] [2021-11-07 08:35:15,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 08:35:15,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 08:35:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:35:15,693 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 37 states have internal predecessors, (148), 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 08:35:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:16,031 INFO L93 Difference]: Finished difference Result 310 states and 311 transitions. [2021-11-07 08:35:16,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 08:35:16,032 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 37 states have internal predecessors, (148), 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 189 [2021-11-07 08:35:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:16,034 INFO L225 Difference]: With dead ends: 310 [2021-11-07 08:35:16,034 INFO L226 Difference]: Without dead ends: 310 [2021-11-07 08:35:16,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:35:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-07 08:35:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 194. [2021-11-07 08:35:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 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 08:35:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2021-11-07 08:35:16,041 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 189 [2021-11-07 08:35:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:16,041 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2021-11-07 08:35:16,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 37 states have internal predecessors, (148), 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 08:35:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2021-11-07 08:35:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-07 08:35:16,043 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:16,044 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:16,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:16,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:16,260 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:35:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash -271426240, now seen corresponding path program 30 times [2021-11-07 08:35:16,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:16,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140529588] [2021-11-07 08:35:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:16,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:17,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:35:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2554 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-07 08:35:17,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:17,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140529588] [2021-11-07 08:35:17,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140529588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:17,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307564049] [2021-11-07 08:35:17,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:35:17,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:17,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:17,124 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:17,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 08:35:21,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-07 08:35:21,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:21,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 08:35:21,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2554 backedges. 100 proven. 276 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2021-11-07 08:35:22,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307564049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:22,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:22,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 18] total 55 [2021-11-07 08:35:22,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44845949] [2021-11-07 08:35:22,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-07 08:35:22,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-07 08:35:22,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1212, Invalid=1758, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 08:35:22,420 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 55 states, 55 states have (on average 3.7454545454545456) internal successors, (206), 54 states have internal predecessors, (206), 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 08:35:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:24,083 INFO L93 Difference]: Finished difference Result 322 states and 324 transitions. [2021-11-07 08:35:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 08:35:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.7454545454545456) internal successors, (206), 54 states have internal predecessors, (206), 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 193 [2021-11-07 08:35:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:24,086 INFO L225 Difference]: With dead ends: 322 [2021-11-07 08:35:24,087 INFO L226 Difference]: Without dead ends: 322 [2021-11-07 08:35:24,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3131, Invalid=5241, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 08:35:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-07 08:35:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 202. [2021-11-07 08:35:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 states have internal predecessors, (200), 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 08:35:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2021-11-07 08:35:24,094 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 193 [2021-11-07 08:35:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:24,095 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2021-11-07 08:35:24,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.7454545454545456) internal successors, (206), 54 states have internal predecessors, (206), 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 08:35:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2021-11-07 08:35:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-07 08:35:24,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:24,097 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:24,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:24,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 08:35:24,312 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:35:24,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:24,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1782738676, now seen corresponding path program 31 times [2021-11-07 08:35:24,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:24,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405471736] [2021-11-07 08:35:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:24,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:25,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:35:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2740 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-07 08:35:25,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:25,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405471736] [2021-11-07 08:35:25,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405471736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:25,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942324517] [2021-11-07 08:35:25,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:35:25,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:25,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:25,103 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:25,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 08:35:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:26,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 08:35:26,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2740 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-07 08:35:27,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942324517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:27,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:27,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-11-07 08:35:27,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854450284] [2021-11-07 08:35:27,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 08:35:27,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 08:35:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:35:27,012 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 40 states, 40 states have (on average 3.9) internal successors, (156), 39 states have internal predecessors, (156), 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 08:35:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:27,436 INFO L93 Difference]: Finished difference Result 327 states and 328 transitions. [2021-11-07 08:35:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:35:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.9) internal successors, (156), 39 states have internal predecessors, (156), 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 201 [2021-11-07 08:35:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:27,439 INFO L225 Difference]: With dead ends: 327 [2021-11-07 08:35:27,439 INFO L226 Difference]: Without dead ends: 327 [2021-11-07 08:35:27,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:35:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-07 08:35:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 206. [2021-11-07 08:35:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 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 08:35:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2021-11-07 08:35:27,446 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 201 [2021-11-07 08:35:27,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:27,447 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2021-11-07 08:35:27,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.9) internal successors, (156), 39 states have internal predecessors, (156), 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 08:35:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2021-11-07 08:35:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-07 08:35:27,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:27,449 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:27,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:27,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 08:35:27,676 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:35:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash -592118639, now seen corresponding path program 32 times [2021-11-07 08:35:27,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:27,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663005532] [2021-11-07 08:35:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:27,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:28,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:35:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2881 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-07 08:35:28,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:28,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663005532] [2021-11-07 08:35:28,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663005532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:28,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528289821] [2021-11-07 08:35:28,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:35:28,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:28,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:28,559 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:28,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 08:35:29,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:35:29,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:29,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 08:35:29,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2881 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-07 08:35:30,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528289821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:30,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:30,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-11-07 08:35:30,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759547850] [2021-11-07 08:35:30,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 08:35:30,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 08:35:30,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 08:35:30,489 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 states have internal predecessors, (160), 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 08:35:30,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:30,911 INFO L93 Difference]: Finished difference Result 336 states and 337 transitions. [2021-11-07 08:35:30,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 08:35:30,912 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 states have internal predecessors, (160), 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 205 [2021-11-07 08:35:30,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:30,914 INFO L225 Difference]: With dead ends: 336 [2021-11-07 08:35:30,914 INFO L226 Difference]: Without dead ends: 336 [2021-11-07 08:35:30,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 08:35:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-07 08:35:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 210. [2021-11-07 08:35:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 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 08:35:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2021-11-07 08:35:30,926 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 205 [2021-11-07 08:35:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:30,926 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2021-11-07 08:35:30,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 states have internal predecessors, (160), 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 08:35:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2021-11-07 08:35:30,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-07 08:35:30,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:30,929 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:30,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:31,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 08:35:31,144 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:35:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:31,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1849855058, now seen corresponding path program 33 times [2021-11-07 08:35:31,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:31,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385768399] [2021-11-07 08:35:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:31,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:31,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:35:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-07 08:35:31,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:31,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385768399] [2021-11-07 08:35:31,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385768399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:31,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273054793] [2021-11-07 08:35:31,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:35:31,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:31,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:31,980 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:32,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 08:35:33,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-07 08:35:33,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:35:33,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 109 proven. 325 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2021-11-07 08:35:34,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273054793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:34,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:34,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 19] total 59 [2021-11-07 08:35:34,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737406709] [2021-11-07 08:35:34,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 08:35:34,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:34,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 08:35:34,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1409, Invalid=2013, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 08:35:34,509 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 59 states, 59 states have (on average 3.76271186440678) internal successors, (222), 58 states have internal predecessors, (222), 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 08:35:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:36,328 INFO L93 Difference]: Finished difference Result 348 states and 350 transitions. [2021-11-07 08:35:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 08:35:36,330 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.76271186440678) internal successors, (222), 58 states have internal predecessors, (222), 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 209 [2021-11-07 08:35:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:36,331 INFO L225 Difference]: With dead ends: 348 [2021-11-07 08:35:36,331 INFO L226 Difference]: Without dead ends: 348 [2021-11-07 08:35:36,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3199 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3637, Invalid=6065, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 08:35:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-07 08:35:36,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 218. [2021-11-07 08:35:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 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 08:35:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2021-11-07 08:35:36,339 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 209 [2021-11-07 08:35:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:36,339 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2021-11-07 08:35:36,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.76271186440678) internal successors, (222), 58 states have internal predecessors, (222), 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 08:35:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2021-11-07 08:35:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-07 08:35:36,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:36,342 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:36,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-07 08:35:36,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-07 08:35:36,560 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:35:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:36,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1850293150, now seen corresponding path program 34 times [2021-11-07 08:35:36,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:36,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677634673] [2021-11-07 08:35:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:36,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:37,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:35:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-07 08:35:37,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:37,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677634673] [2021-11-07 08:35:37,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677634673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:37,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897718266] [2021-11-07 08:35:37,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:35:37,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:37,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:37,523 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:37,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 08:35:41,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:35:41,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:41,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 08:35:41,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-07 08:35:41,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897718266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:41,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:41,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-11-07 08:35:41,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189747517] [2021-11-07 08:35:41,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 08:35:41,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 08:35:41,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:35:41,850 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand has 43 states, 43 states have (on average 3.9069767441860463) internal successors, (168), 42 states have internal predecessors, (168), 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 08:35:42,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:42,276 INFO L93 Difference]: Finished difference Result 353 states and 354 transitions. [2021-11-07 08:35:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:35:42,276 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.9069767441860463) internal successors, (168), 42 states have internal predecessors, (168), 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 217 [2021-11-07 08:35:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:42,278 INFO L225 Difference]: With dead ends: 353 [2021-11-07 08:35:42,278 INFO L226 Difference]: Without dead ends: 353 [2021-11-07 08:35:42,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:35:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-07 08:35:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 222. [2021-11-07 08:35:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 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 08:35:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2021-11-07 08:35:42,284 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 217 [2021-11-07 08:35:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:42,284 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2021-11-07 08:35:42,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.9069767441860463) internal successors, (168), 42 states have internal predecessors, (168), 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 08:35:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2021-11-07 08:35:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-07 08:35:42,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:42,286 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:42,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:42,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:42,496 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:35:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:42,497 INFO L85 PathProgramCache]: Analyzing trace with hash -409176065, now seen corresponding path program 35 times [2021-11-07 08:35:42,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:42,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292834180] [2021-11-07 08:35:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:42,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:43,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:35:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3381 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-07 08:35:43,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:43,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292834180] [2021-11-07 08:35:43,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292834180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:43,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149326243] [2021-11-07 08:35:43,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:35:43,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:43,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:43,488 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:43,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 08:35:48,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-11-07 08:35:48,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:48,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 08:35:48,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3381 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-07 08:35:49,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149326243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:49,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:49,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-11-07 08:35:49,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153965198] [2021-11-07 08:35:49,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 08:35:49,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:49,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 08:35:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:35:49,508 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 43 states have internal predecessors, (172), 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 08:35:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:35:49,893 INFO L93 Difference]: Finished difference Result 362 states and 363 transitions. [2021-11-07 08:35:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 08:35:49,894 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 43 states have internal predecessors, (172), 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 221 [2021-11-07 08:35:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:35:49,895 INFO L225 Difference]: With dead ends: 362 [2021-11-07 08:35:49,896 INFO L226 Difference]: Without dead ends: 362 [2021-11-07 08:35:49,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:35:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-07 08:35:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 226. [2021-11-07 08:35:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 222 states have (on average 1.009009009009009) internal successors, (224), 222 states have internal predecessors, (224), 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 08:35:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2021-11-07 08:35:49,902 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 221 [2021-11-07 08:35:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:35:49,903 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2021-11-07 08:35:49,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 43 states have internal predecessors, (172), 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 08:35:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2021-11-07 08:35:49,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-07 08:35:49,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:35:49,905 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:35:49,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 08:35:50,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-07 08:35:50,132 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:35:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:35:50,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1508567780, now seen corresponding path program 36 times [2021-11-07 08:35:50,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:35:50,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510252285] [2021-11-07 08:35:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:35:50,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:35:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:50,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:35:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:35:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3538 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-07 08:35:50,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:35:50,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510252285] [2021-11-07 08:35:50,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510252285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:50,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197452850] [2021-11-07 08:35:50,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:35:50,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:35:50,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:35:51,005 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:35:51,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 08:35:57,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-07 08:35:57,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:35:57,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:35:57,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:35:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3538 backedges. 118 proven. 378 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2021-11-07 08:35:58,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197452850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:35:58,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:35:58,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 20] total 63 [2021-11-07 08:35:58,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545207509] [2021-11-07 08:35:58,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 08:35:58,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:35:58,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 08:35:58,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1621, Invalid=2285, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 08:35:58,303 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 63 states, 63 states have (on average 3.7777777777777777) internal successors, (238), 62 states have internal predecessors, (238), 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 08:36:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:36:00,321 INFO L93 Difference]: Finished difference Result 374 states and 376 transitions. [2021-11-07 08:36:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 08:36:00,322 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.7777777777777777) internal successors, (238), 62 states have internal predecessors, (238), 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 225 [2021-11-07 08:36:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:36:00,324 INFO L225 Difference]: With dead ends: 374 [2021-11-07 08:36:00,324 INFO L226 Difference]: Without dead ends: 374 [2021-11-07 08:36:00,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3684 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4181, Invalid=6949, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 08:36:00,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-07 08:36:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 234. [2021-11-07 08:36:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 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 08:36:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2021-11-07 08:36:00,332 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 225 [2021-11-07 08:36:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:36:00,333 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2021-11-07 08:36:00,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.7777777777777777) internal successors, (238), 62 states have internal predecessors, (238), 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 08:36:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2021-11-07 08:36:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-07 08:36:00,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:00,335 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:00,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-07 08:36:00,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:00,564 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:36:00,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1196303568, now seen corresponding path program 37 times [2021-11-07 08:36:00,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:00,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195202058] [2021-11-07 08:36:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:00,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:01,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:36:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3756 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-07 08:36:01,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:01,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195202058] [2021-11-07 08:36:01,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195202058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:01,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059965409] [2021-11-07 08:36:01,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:36:01,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:01,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:36:01,417 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:36:01,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 08:36:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:03,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 08:36:03,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:36:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3756 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-07 08:36:03,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059965409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:03,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:36:03,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-11-07 08:36:03,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148728027] [2021-11-07 08:36:03,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 08:36:03,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:03,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 08:36:03,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:36:03,676 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand has 46 states, 46 states have (on average 3.9130434782608696) internal successors, (180), 45 states have internal predecessors, (180), 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 08:36:04,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:36:04,121 INFO L93 Difference]: Finished difference Result 379 states and 380 transitions. [2021-11-07 08:36:04,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 08:36:04,122 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.9130434782608696) internal successors, (180), 45 states have internal predecessors, (180), 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 233 [2021-11-07 08:36:04,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:36:04,124 INFO L225 Difference]: With dead ends: 379 [2021-11-07 08:36:04,124 INFO L226 Difference]: Without dead ends: 379 [2021-11-07 08:36:04,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:36:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-07 08:36:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 238. [2021-11-07 08:36:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 234 states have (on average 1.0085470085470085) internal successors, (236), 234 states have internal predecessors, (236), 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 08:36:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2021-11-07 08:36:04,130 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 233 [2021-11-07 08:36:04,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:36:04,131 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2021-11-07 08:36:04,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.9130434782608696) internal successors, (180), 45 states have internal predecessors, (180), 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 08:36:04,131 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2021-11-07 08:36:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-07 08:36:04,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:04,134 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:04,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-07 08:36:04,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:04,348 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:36:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:04,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1905983085, now seen corresponding path program 38 times [2021-11-07 08:36:04,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:04,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521370078] [2021-11-07 08:36:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:04,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:05,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:36:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3921 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-07 08:36:05,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:05,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521370078] [2021-11-07 08:36:05,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521370078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:05,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109466610] [2021-11-07 08:36:05,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:36:05,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:05,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:36:05,240 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:36:05,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 08:36:07,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:36:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:36:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 08:36:07,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:36:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3921 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-07 08:36:07,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109466610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:07,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:36:07,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-11-07 08:36:07,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466457863] [2021-11-07 08:36:07,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 08:36:07,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:07,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 08:36:07,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 08:36:07,722 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 46 states have internal predecessors, (184), 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 08:36:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:36:08,308 INFO L93 Difference]: Finished difference Result 388 states and 389 transitions. [2021-11-07 08:36:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:36:08,309 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 46 states have internal predecessors, (184), 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 237 [2021-11-07 08:36:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:36:08,311 INFO L225 Difference]: With dead ends: 388 [2021-11-07 08:36:08,311 INFO L226 Difference]: Without dead ends: 388 [2021-11-07 08:36:08,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 08:36:08,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-07 08:36:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 242. [2021-11-07 08:36:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 238 states have internal predecessors, (240), 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 08:36:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2021-11-07 08:36:08,318 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 237 [2021-11-07 08:36:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:36:08,319 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2021-11-07 08:36:08,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 46 states have internal predecessors, (184), 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 08:36:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2021-11-07 08:36:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-07 08:36:08,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:08,321 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:08,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 08:36:08,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:08,536 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:36:08,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:08,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1871199862, now seen corresponding path program 39 times [2021-11-07 08:36:08,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:08,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305147149] [2021-11-07 08:36:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:08,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:09,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:36:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-07 08:36:09,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:09,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305147149] [2021-11-07 08:36:09,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305147149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:09,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448744612] [2021-11-07 08:36:09,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:36:09,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:09,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:36:09,447 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:36:09,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 08:36:11,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 08:36:11,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:36:11,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:36:11,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:36:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 127 proven. 435 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2021-11-07 08:36:12,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448744612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:12,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:36:12,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 21] total 67 [2021-11-07 08:36:12,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824629038] [2021-11-07 08:36:12,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-07 08:36:12,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:12,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-07 08:36:12,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1848, Invalid=2574, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 08:36:12,657 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand has 67 states, 67 states have (on average 3.791044776119403) internal successors, (254), 66 states have internal predecessors, (254), 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 08:36:14,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:36:14,954 INFO L93 Difference]: Finished difference Result 400 states and 402 transitions. [2021-11-07 08:36:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 08:36:14,955 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.791044776119403) internal successors, (254), 66 states have internal predecessors, (254), 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 241 [2021-11-07 08:36:14,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:36:14,957 INFO L225 Difference]: With dead ends: 400 [2021-11-07 08:36:14,957 INFO L226 Difference]: Without dead ends: 400 [2021-11-07 08:36:14,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4763, Invalid=7893, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 08:36:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-07 08:36:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 250. [2021-11-07 08:36:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 246 states have (on average 1.008130081300813) internal successors, (248), 246 states have internal predecessors, (248), 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 08:36:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2021-11-07 08:36:14,964 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 241 [2021-11-07 08:36:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:36:14,964 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2021-11-07 08:36:14,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.791044776119403) internal successors, (254), 66 states have internal predecessors, (254), 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 08:36:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2021-11-07 08:36:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-07 08:36:14,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:14,967 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:15,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-07 08:36:15,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 08:36:15,180 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:36:15,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:15,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1821962178, now seen corresponding path program 40 times [2021-11-07 08:36:15,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:15,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005150855] [2021-11-07 08:36:15,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:15,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:16,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:36:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-07 08:36:16,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:16,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005150855] [2021-11-07 08:36:16,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005150855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:16,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414182069] [2021-11-07 08:36:16,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:36:16,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:16,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:36:16,256 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:36:16,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 08:36:25,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:36:25,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:36:25,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 08:36:25,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:36:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-07 08:36:25,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414182069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:25,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:36:25,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-11-07 08:36:25,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589975681] [2021-11-07 08:36:25,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 08:36:25,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:25,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 08:36:25,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 08:36:25,667 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand has 49 states, 49 states have (on average 3.9183673469387754) internal successors, (192), 48 states have internal predecessors, (192), 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 08:36:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:36:26,095 INFO L93 Difference]: Finished difference Result 405 states and 406 transitions. [2021-11-07 08:36:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 08:36:26,095 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.9183673469387754) internal successors, (192), 48 states have internal predecessors, (192), 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 249 [2021-11-07 08:36:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:36:26,097 INFO L225 Difference]: With dead ends: 405 [2021-11-07 08:36:26,097 INFO L226 Difference]: Without dead ends: 405 [2021-11-07 08:36:26,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 08:36:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-07 08:36:26,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 254. [2021-11-07 08:36:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 250 states have (on average 1.008) internal successors, (252), 250 states have internal predecessors, (252), 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 08:36:26,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2021-11-07 08:36:26,103 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 249 [2021-11-07 08:36:26,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:36:26,104 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2021-11-07 08:36:26,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.9183673469387754) internal successors, (192), 48 states have internal predecessors, (192), 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 08:36:26,104 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2021-11-07 08:36:26,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-07 08:36:26,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:26,106 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:26,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-07 08:36:26,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 08:36:26,320 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:36:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash 453971931, now seen corresponding path program 41 times [2021-11-07 08:36:26,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:26,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208044889] [2021-11-07 08:36:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:26,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:27,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:36:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4501 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-07 08:36:27,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:27,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208044889] [2021-11-07 08:36:27,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208044889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:27,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033367981] [2021-11-07 08:36:27,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:36:27,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:27,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:36:27,254 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:36:27,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 08:36:49,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-11-07 08:36:49,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:36:49,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 08:36:49,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:36:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4501 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-07 08:36:50,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033367981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:50,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:36:50,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-11-07 08:36:50,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158908778] [2021-11-07 08:36:50,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 08:36:50,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:50,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 08:36:50,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:36:50,327 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand has 50 states, 50 states have (on average 3.92) internal successors, (196), 49 states have internal predecessors, (196), 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 08:36:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:36:50,778 INFO L93 Difference]: Finished difference Result 414 states and 415 transitions. [2021-11-07 08:36:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 08:36:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.92) internal successors, (196), 49 states have internal predecessors, (196), 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 253 [2021-11-07 08:36:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:36:50,780 INFO L225 Difference]: With dead ends: 414 [2021-11-07 08:36:50,781 INFO L226 Difference]: Without dead ends: 414 [2021-11-07 08:36:50,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:36:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-07 08:36:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 258. [2021-11-07 08:36:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 states have internal predecessors, (256), 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 08:36:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2021-11-07 08:36:50,787 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 253 [2021-11-07 08:36:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:36:50,788 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2021-11-07 08:36:50,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.92) internal successors, (196), 49 states have internal predecessors, (196), 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 08:36:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2021-11-07 08:36:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-07 08:36:50,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:50,790 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:50,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-07 08:36:51,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 08:36:51,004 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:36:51,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:51,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1992034056, now seen corresponding path program 42 times [2021-11-07 08:36:51,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:51,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128718440] [2021-11-07 08:36:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:51,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:52,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:36:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-07 08:36:52,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:52,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128718440] [2021-11-07 08:36:52,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128718440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:52,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227067791] [2021-11-07 08:36:52,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:36:52,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:52,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:36:52,160 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:36:52,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 08:37:05,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-11-07 08:37:05,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:37:05,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 08:37:05,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:37:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 136 proven. 496 refuted. 0 times theorem prover too weak. 4050 trivial. 0 not checked. [2021-11-07 08:37:06,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227067791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:06,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:37:06,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 22] total 71 [2021-11-07 08:37:06,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919192433] [2021-11-07 08:37:06,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-07 08:37:06,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:06,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-07 08:37:06,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2090, Invalid=2880, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 08:37:06,722 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand has 71 states, 71 states have (on average 3.8028169014084505) internal successors, (270), 70 states have internal predecessors, (270), 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 08:37:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:09,487 INFO L93 Difference]: Finished difference Result 426 states and 428 transitions. [2021-11-07 08:37:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 08:37:09,487 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.8028169014084505) internal successors, (270), 70 states have internal predecessors, (270), 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 257 [2021-11-07 08:37:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:09,489 INFO L225 Difference]: With dead ends: 426 [2021-11-07 08:37:09,489 INFO L226 Difference]: Without dead ends: 426 [2021-11-07 08:37:09,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4756 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5383, Invalid=8897, Unknown=0, NotChecked=0, Total=14280 [2021-11-07 08:37:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-07 08:37:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 266. [2021-11-07 08:37:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 262 states have (on average 1.0076335877862594) internal successors, (264), 262 states have internal predecessors, (264), 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 08:37:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2021-11-07 08:37:09,496 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 257 [2021-11-07 08:37:09,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:09,497 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2021-11-07 08:37:09,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.8028169014084505) internal successors, (270), 70 states have internal predecessors, (270), 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 08:37:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2021-11-07 08:37:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-07 08:37:09,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:09,499 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:09,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-07 08:37:09,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:09,724 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:37:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash -216004948, now seen corresponding path program 43 times [2021-11-07 08:37:09,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:09,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109213647] [2021-11-07 08:37:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:09,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:11,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:37:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-11-07 08:37:11,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:11,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109213647] [2021-11-07 08:37:11,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109213647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:11,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898323612] [2021-11-07 08:37:11,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:37:11,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:11,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:11,073 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:37:11,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 08:37:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:13,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 08:37:13,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:37:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-11-07 08:37:13,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898323612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:13,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:37:13,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-11-07 08:37:13,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762077312] [2021-11-07 08:37:13,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 08:37:13,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:13,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 08:37:13,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:37:13,806 INFO L87 Difference]: Start difference. First operand 266 states and 267 transitions. Second operand has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 51 states have internal predecessors, (204), 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 08:37:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:14,267 INFO L93 Difference]: Finished difference Result 431 states and 432 transitions. [2021-11-07 08:37:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 08:37:14,267 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 51 states have internal predecessors, (204), 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 265 [2021-11-07 08:37:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:14,269 INFO L225 Difference]: With dead ends: 431 [2021-11-07 08:37:14,269 INFO L226 Difference]: Without dead ends: 431 [2021-11-07 08:37:14,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:37:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-07 08:37:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 270. [2021-11-07 08:37:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 266 states have (on average 1.0075187969924813) internal successors, (268), 266 states have internal predecessors, (268), 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 08:37:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2021-11-07 08:37:14,274 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 265 [2021-11-07 08:37:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:14,274 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2021-11-07 08:37:14,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 51 states have internal predecessors, (204), 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 08:37:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2021-11-07 08:37:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-07 08:37:14,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:14,277 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:14,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-07 08:37:14,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:14,501 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:37:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash -115921847, now seen corresponding path program 44 times [2021-11-07 08:37:14,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:14,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535836140] [2021-11-07 08:37:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:14,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:15,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:37:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5121 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-11-07 08:37:15,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:15,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535836140] [2021-11-07 08:37:15,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535836140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:15,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557963726] [2021-11-07 08:37:15,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:37:15,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:15,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:15,800 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:37:15,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 08:37:17,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:37:17,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:37:17,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 08:37:17,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:37:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5121 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-11-07 08:37:18,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557963726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:18,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:37:18,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-11-07 08:37:18,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112113374] [2021-11-07 08:37:18,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-07 08:37:18,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-07 08:37:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 08:37:18,588 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 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 08:37:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:19,082 INFO L93 Difference]: Finished difference Result 440 states and 441 transitions. [2021-11-07 08:37:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 08:37:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 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 269 [2021-11-07 08:37:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:19,084 INFO L225 Difference]: With dead ends: 440 [2021-11-07 08:37:19,084 INFO L226 Difference]: Without dead ends: 440 [2021-11-07 08:37:19,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 08:37:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-07 08:37:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 274. [2021-11-07 08:37:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 270 states have (on average 1.0074074074074073) internal successors, (272), 270 states have internal predecessors, (272), 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 08:37:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2021-11-07 08:37:19,090 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 269 [2021-11-07 08:37:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:19,090 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2021-11-07 08:37:19,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 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 08:37:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2021-11-07 08:37:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-07 08:37:19,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:19,093 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:19,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-07 08:37:19,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:19,308 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:37:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1033386854, now seen corresponding path program 45 times [2021-11-07 08:37:19,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:19,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271902202] [2021-11-07 08:37:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:19,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:20,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:37:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5314 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-11-07 08:37:20,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:20,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271902202] [2021-11-07 08:37:20,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271902202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:20,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142198096] [2021-11-07 08:37:20,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:37:20,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:20,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:20,426 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:37:20,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 08:37:22,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-07 08:37:22,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:37:22,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 08:37:22,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:37:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5314 backedges. 145 proven. 561 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2021-11-07 08:37:24,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142198096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:24,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:37:24,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 23] total 75 [2021-11-07 08:37:24,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662357298] [2021-11-07 08:37:24,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-07 08:37:24,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:24,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-07 08:37:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2347, Invalid=3203, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 08:37:24,132 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand has 75 states, 75 states have (on average 3.8133333333333335) internal successors, (286), 74 states have internal predecessors, (286), 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 08:37:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:26,794 INFO L93 Difference]: Finished difference Result 452 states and 454 transitions. [2021-11-07 08:37:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 08:37:26,794 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.8133333333333335) internal successors, (286), 74 states have internal predecessors, (286), 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 273 [2021-11-07 08:37:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:26,796 INFO L225 Difference]: With dead ends: 452 [2021-11-07 08:37:26,796 INFO L226 Difference]: Without dead ends: 452 [2021-11-07 08:37:26,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5343 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6041, Invalid=9961, Unknown=0, NotChecked=0, Total=16002 [2021-11-07 08:37:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-07 08:37:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 282. [2021-11-07 08:37:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 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 08:37:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2021-11-07 08:37:26,802 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 273 [2021-11-07 08:37:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:26,802 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2021-11-07 08:37:26,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.8133333333333335) internal successors, (286), 74 states have internal predecessors, (286), 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 08:37:26,802 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2021-11-07 08:37:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-07 08:37:26,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:26,804 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:26,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-07 08:37:27,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-07 08:37:27,032 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:37:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:27,032 INFO L85 PathProgramCache]: Analyzing trace with hash -128481254, now seen corresponding path program 46 times [2021-11-07 08:37:27,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:27,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157804384] [2021-11-07 08:37:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:27,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:28,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:37:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5580 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-11-07 08:37:28,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:28,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157804384] [2021-11-07 08:37:28,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157804384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:28,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98536915] [2021-11-07 08:37:28,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:37:28,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:28,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:28,193 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:37:28,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 08:37:37,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:37:37,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:37:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 08:37:37,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:37:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5580 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-11-07 08:37:38,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98536915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:38,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:37:38,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-11-07 08:37:38,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567237713] [2021-11-07 08:37:38,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-07 08:37:38,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:38,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-07 08:37:38,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 08:37:38,060 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand has 55 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 54 states have internal predecessors, (216), 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 08:37:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:38,584 INFO L93 Difference]: Finished difference Result 457 states and 458 transitions. [2021-11-07 08:37:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 08:37:38,584 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 54 states have internal predecessors, (216), 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 281 [2021-11-07 08:37:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:38,586 INFO L225 Difference]: With dead ends: 457 [2021-11-07 08:37:38,586 INFO L226 Difference]: Without dead ends: 457 [2021-11-07 08:37:38,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 08:37:38,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-07 08:37:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 286. [2021-11-07 08:37:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 282 states have (on average 1.0070921985815602) internal successors, (284), 282 states have internal predecessors, (284), 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 08:37:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2021-11-07 08:37:38,592 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 281 [2021-11-07 08:37:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:38,592 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2021-11-07 08:37:38,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 54 states have internal predecessors, (216), 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 08:37:38,593 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2021-11-07 08:37:38,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-07 08:37:38,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:38,595 INFO L513 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:38,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-07 08:37:38,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:38,812 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:37:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:38,812 INFO L85 PathProgramCache]: Analyzing trace with hash 898749367, now seen corresponding path program 47 times [2021-11-07 08:37:38,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:38,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393614544] [2021-11-07 08:37:38,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:38,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:39,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:37:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5781 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-11-07 08:37:39,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:39,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393614544] [2021-11-07 08:37:39,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393614544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:37:39,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053146943] [2021-11-07 08:37:39,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:37:39,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:39,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:39,987 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:37:39,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 08:38:25,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2021-11-07 08:38:25,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:38:25,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-07 08:38:25,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5781 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-11-07 08:38:26,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053146943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:26,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:26,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-11-07 08:38:26,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638899158] [2021-11-07 08:38:26,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-07 08:38:26,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:26,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-07 08:38:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:38:26,502 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 55 states have internal predecessors, (220), 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 08:38:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:27,206 INFO L93 Difference]: Finished difference Result 466 states and 467 transitions. [2021-11-07 08:38:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-07 08:38:27,206 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 55 states have internal predecessors, (220), 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 285 [2021-11-07 08:38:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:27,209 INFO L225 Difference]: With dead ends: 466 [2021-11-07 08:38:27,209 INFO L226 Difference]: Without dead ends: 466 [2021-11-07 08:38:27,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:38:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-07 08:38:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 290. [2021-11-07 08:38:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 286 states have (on average 1.006993006993007) internal successors, (288), 286 states have internal predecessors, (288), 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 08:38:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 291 transitions. [2021-11-07 08:38:27,214 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 291 transitions. Word has length 285 [2021-11-07 08:38:27,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:27,215 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 291 transitions. [2021-11-07 08:38:27,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 55 states have internal predecessors, (220), 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 08:38:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 291 transitions. [2021-11-07 08:38:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-07 08:38:27,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:27,218 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:27,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-07 08:38:27,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:27,430 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:38:27,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:27,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1867712724, now seen corresponding path program 48 times [2021-11-07 08:38:27,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:27,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915638854] [2021-11-07 08:38:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:27,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:28,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-11-07 08:38:28,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:28,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915638854] [2021-11-07 08:38:28,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915638854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:28,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977979204] [2021-11-07 08:38:28,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:38:28,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:28,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:28,793 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:28,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 08:39:00,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-07 08:39:00,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:00,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 08:39:00,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 154 proven. 630 refuted. 0 times theorem prover too weak. 5202 trivial. 0 not checked. [2021-11-07 08:39:02,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977979204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:02,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:02,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 24] total 79 [2021-11-07 08:39:02,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168511000] [2021-11-07 08:39:02,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-07 08:39:02,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:02,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-07 08:39:02,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2619, Invalid=3543, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 08:39:02,223 INFO L87 Difference]: Start difference. First operand 290 states and 291 transitions. Second operand has 79 states, 79 states have (on average 3.8227848101265822) internal successors, (302), 78 states have internal predecessors, (302), 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 08:39:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:05,572 INFO L93 Difference]: Finished difference Result 478 states and 480 transitions. [2021-11-07 08:39:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 08:39:05,573 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.8227848101265822) internal successors, (302), 78 states have internal predecessors, (302), 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 289 [2021-11-07 08:39:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:05,575 INFO L225 Difference]: With dead ends: 478 [2021-11-07 08:39:05,575 INFO L226 Difference]: Without dead ends: 478 [2021-11-07 08:39:05,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5964 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6737, Invalid=11085, Unknown=0, NotChecked=0, Total=17822 [2021-11-07 08:39:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-07 08:39:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 298. [2021-11-07 08:39:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 294 states have (on average 1.0068027210884354) internal successors, (296), 294 states have internal predecessors, (296), 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 08:39:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2021-11-07 08:39:05,580 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 289 [2021-11-07 08:39:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:05,581 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2021-11-07 08:39:05,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.8227848101265822) internal successors, (302), 78 states have internal predecessors, (302), 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 08:39:05,581 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2021-11-07 08:39:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-07 08:39:05,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:05,584 INFO L513 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:05,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-07 08:39:05,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-07 08:39:05,787 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:39:05,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:05,787 INFO L85 PathProgramCache]: Analyzing trace with hash -374598520, now seen corresponding path program 49 times [2021-11-07 08:39:05,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:05,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12116849] [2021-11-07 08:39:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:05,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:06,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:39:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6268 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-11-07 08:39:06,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12116849] [2021-11-07 08:39:06,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12116849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761438073] [2021-11-07 08:39:06,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:39:06,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:06,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:06,946 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:06,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 08:39:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:09,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-07 08:39:09,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6268 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-11-07 08:39:10,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761438073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:10,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:10,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2021-11-07 08:39:10,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121114267] [2021-11-07 08:39:10,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-07 08:39:10,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:10,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-07 08:39:10,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 08:39:10,224 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand has 58 states, 58 states have (on average 3.9310344827586206) internal successors, (228), 57 states have internal predecessors, (228), 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 08:39:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:10,782 INFO L93 Difference]: Finished difference Result 483 states and 484 transitions. [2021-11-07 08:39:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-07 08:39:10,783 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.9310344827586206) internal successors, (228), 57 states have internal predecessors, (228), 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 297 [2021-11-07 08:39:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:10,785 INFO L225 Difference]: With dead ends: 483 [2021-11-07 08:39:10,785 INFO L226 Difference]: Without dead ends: 483 [2021-11-07 08:39:10,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 08:39:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-07 08:39:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 302. [2021-11-07 08:39:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 298 states have (on average 1.0067114093959733) internal successors, (300), 298 states have internal predecessors, (300), 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 08:39:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 303 transitions. [2021-11-07 08:39:10,789 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 303 transitions. Word has length 297 [2021-11-07 08:39:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:10,790 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 303 transitions. [2021-11-07 08:39:10,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.9310344827586206) internal successors, (228), 57 states have internal predecessors, (228), 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 08:39:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 303 transitions. [2021-11-07 08:39:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-07 08:39:10,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:10,792 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:10,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-07 08:39:10,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-07 08:39:10,992 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:39:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:10,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1357019611, now seen corresponding path program 50 times [2021-11-07 08:39:10,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:10,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38775086] [2021-11-07 08:39:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:10,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:12,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:39:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6481 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-11-07 08:39:12,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:12,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38775086] [2021-11-07 08:39:12,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38775086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:12,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705122034] [2021-11-07 08:39:12,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:39:12,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:12,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:12,240 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:12,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 08:39:14,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:39:14,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-07 08:39:14,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6481 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-11-07 08:39:15,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705122034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:15,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:15,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2021-11-07 08:39:15,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926499909] [2021-11-07 08:39:15,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 08:39:15,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:15,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 08:39:15,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 08:39:15,623 INFO L87 Difference]: Start difference. First operand 302 states and 303 transitions. Second operand has 59 states, 59 states have (on average 3.9322033898305087) internal successors, (232), 58 states have internal predecessors, (232), 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 08:39:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:16,241 INFO L93 Difference]: Finished difference Result 492 states and 493 transitions. [2021-11-07 08:39:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 08:39:16,241 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.9322033898305087) internal successors, (232), 58 states have internal predecessors, (232), 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 301 [2021-11-07 08:39:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:16,243 INFO L225 Difference]: With dead ends: 492 [2021-11-07 08:39:16,243 INFO L226 Difference]: Without dead ends: 492 [2021-11-07 08:39:16,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 08:39:16,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-07 08:39:16,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 306. [2021-11-07 08:39:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 302 states have (on average 1.0066225165562914) internal successors, (304), 302 states have internal predecessors, (304), 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 08:39:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 307 transitions. [2021-11-07 08:39:16,253 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 307 transitions. Word has length 301 [2021-11-07 08:39:16,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:16,254 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 307 transitions. [2021-11-07 08:39:16,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.9322033898305087) internal successors, (232), 58 states have internal predecessors, (232), 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 08:39:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 307 transitions. [2021-11-07 08:39:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-07 08:39:16,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:16,257 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:16,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:16,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-07 08:39:16,472 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:39:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1793924798, now seen corresponding path program 51 times [2021-11-07 08:39:16,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:16,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788755612] [2021-11-07 08:39:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:16,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:17,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:39:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6698 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-11-07 08:39:17,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:17,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788755612] [2021-11-07 08:39:17,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788755612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:17,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990321000] [2021-11-07 08:39:17,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:39:17,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:17,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:17,900 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:17,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 08:39:21,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-07 08:39:21,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:21,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:39:21,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6698 backedges. 163 proven. 703 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2021-11-07 08:39:22,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990321000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:22,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:22,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 25] total 83 [2021-11-07 08:39:22,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823603549] [2021-11-07 08:39:22,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 08:39:22,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:22,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 08:39:22,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2906, Invalid=3900, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 08:39:22,765 INFO L87 Difference]: Start difference. First operand 306 states and 307 transitions. Second operand has 83 states, 83 states have (on average 3.8313253012048194) internal successors, (318), 82 states have internal predecessors, (318), 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 08:39:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:26,184 INFO L93 Difference]: Finished difference Result 504 states and 506 transitions. [2021-11-07 08:39:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 08:39:26,184 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.8313253012048194) internal successors, (318), 82 states have internal predecessors, (318), 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 305 [2021-11-07 08:39:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:26,187 INFO L225 Difference]: With dead ends: 504 [2021-11-07 08:39:26,187 INFO L226 Difference]: Without dead ends: 504 [2021-11-07 08:39:26,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6619 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7471, Invalid=12269, Unknown=0, NotChecked=0, Total=19740 [2021-11-07 08:39:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-07 08:39:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 314. [2021-11-07 08:39:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 310 states have (on average 1.0064516129032257) internal successors, (312), 310 states have internal predecessors, (312), 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 08:39:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 315 transitions. [2021-11-07 08:39:26,192 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 315 transitions. Word has length 305 [2021-11-07 08:39:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:26,192 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 315 transitions. [2021-11-07 08:39:26,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.8313253012048194) internal successors, (318), 82 states have internal predecessors, (318), 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 08:39:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 315 transitions. [2021-11-07 08:39:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-07 08:39:26,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:26,195 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:26,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:26,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:26,410 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:39:26,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:26,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1652304886, now seen corresponding path program 52 times [2021-11-07 08:39:26,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:26,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131677930] [2021-11-07 08:39:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:26,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:27,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:39:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-07 08:39:27,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:27,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131677930] [2021-11-07 08:39:27,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131677930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:27,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312197475] [2021-11-07 08:39:27,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:39:27,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:27,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:27,864 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:27,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 08:39:42,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:39:42,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:42,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-07 08:39:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-07 08:39:43,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312197475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:43,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:43,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2021-11-07 08:39:43,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784260527] [2021-11-07 08:39:43,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-07 08:39:43,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:43,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-07 08:39:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 08:39:43,063 INFO L87 Difference]: Start difference. First operand 314 states and 315 transitions. Second operand has 61 states, 61 states have (on average 3.9344262295081966) internal successors, (240), 60 states have internal predecessors, (240), 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 08:39:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:43,793 INFO L93 Difference]: Finished difference Result 509 states and 510 transitions. [2021-11-07 08:39:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 08:39:43,794 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.9344262295081966) internal successors, (240), 60 states have internal predecessors, (240), 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 313 [2021-11-07 08:39:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:43,796 INFO L225 Difference]: With dead ends: 509 [2021-11-07 08:39:43,796 INFO L226 Difference]: Without dead ends: 509 [2021-11-07 08:39:43,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 08:39:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-07 08:39:43,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 318. [2021-11-07 08:39:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 314 states have (on average 1.0063694267515924) internal successors, (316), 314 states have internal predecessors, (316), 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 08:39:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 319 transitions. [2021-11-07 08:39:43,802 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 319 transitions. Word has length 313 [2021-11-07 08:39:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:43,802 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 319 transitions. [2021-11-07 08:39:43,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.9344262295081966) internal successors, (240), 60 states have internal predecessors, (240), 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 08:39:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 319 transitions. [2021-11-07 08:39:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-07 08:39:43,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:43,806 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:43,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:44,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-07 08:39:44,020 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:39:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1726430317, now seen corresponding path program 53 times [2021-11-07 08:39:44,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:44,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037179255] [2021-11-07 08:39:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:44,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:45,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:39:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-07 08:39:45,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:45,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037179255] [2021-11-07 08:39:45,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037179255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:45,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621640534] [2021-11-07 08:39:45,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:39:45,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:45,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:45,916 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:45,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-07 08:41:01,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2021-11-07 08:41:01,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:41:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-07 08:41:01,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-07 08:41:02,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621640534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:02,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:02,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2021-11-07 08:41:02,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956694817] [2021-11-07 08:41:02,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-07 08:41:02,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-07 08:41:02,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 08:41:02,856 INFO L87 Difference]: Start difference. First operand 318 states and 319 transitions. Second operand has 62 states, 62 states have (on average 3.935483870967742) internal successors, (244), 61 states have internal predecessors, (244), 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 08:41:03,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:03,653 INFO L93 Difference]: Finished difference Result 518 states and 519 transitions. [2021-11-07 08:41:03,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-07 08:41:03,653 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.935483870967742) internal successors, (244), 61 states have internal predecessors, (244), 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 317 [2021-11-07 08:41:03,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:03,655 INFO L225 Difference]: With dead ends: 518 [2021-11-07 08:41:03,655 INFO L226 Difference]: Without dead ends: 518 [2021-11-07 08:41:03,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 08:41:03,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-07 08:41:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 322. [2021-11-07 08:41:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 318 states have (on average 1.0062893081761006) internal successors, (320), 318 states have internal predecessors, (320), 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 08:41:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2021-11-07 08:41:03,660 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 317 [2021-11-07 08:41:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:03,660 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2021-11-07 08:41:03,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.935483870967742) internal successors, (244), 61 states have internal predecessors, (244), 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 08:41:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2021-11-07 08:41:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-07 08:41:03,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:03,662 INFO L513 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:03,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:03,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:03,862 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:41:03,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2050376880, now seen corresponding path program 54 times [2021-11-07 08:41:03,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:03,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171176485] [2021-11-07 08:41:03,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:03,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:05,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:41:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-07 08:41:05,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:05,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171176485] [2021-11-07 08:41:05,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171176485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:05,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486785724] [2021-11-07 08:41:05,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:41:05,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:05,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:05,407 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:05,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 08:41:51,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2021-11-07 08:41:51,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:41:51,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:41:51,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:41:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 172 proven. 780 refuted. 0 times theorem prover too weak. 6498 trivial. 0 not checked. [2021-11-07 08:41:53,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486785724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:53,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:41:53,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 26] total 87 [2021-11-07 08:41:53,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310107921] [2021-11-07 08:41:53,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-07 08:41:53,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:41:53,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-07 08:41:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3208, Invalid=4274, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 08:41:53,406 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand has 87 states, 87 states have (on average 3.839080459770115) internal successors, (334), 86 states have internal predecessors, (334), 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 08:41:56,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:41:56,868 INFO L93 Difference]: Finished difference Result 530 states and 532 transitions. [2021-11-07 08:41:56,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 08:41:56,869 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.839080459770115) internal successors, (334), 86 states have internal predecessors, (334), 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 321 [2021-11-07 08:41:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:41:56,872 INFO L225 Difference]: With dead ends: 530 [2021-11-07 08:41:56,872 INFO L226 Difference]: Without dead ends: 530 [2021-11-07 08:41:56,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7308 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8243, Invalid=13513, Unknown=0, NotChecked=0, Total=21756 [2021-11-07 08:41:56,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-07 08:41:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 330. [2021-11-07 08:41:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 326 states have (on average 1.0061349693251533) internal successors, (328), 326 states have internal predecessors, (328), 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 08:41:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2021-11-07 08:41:56,881 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 321 [2021-11-07 08:41:56,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:41:56,881 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2021-11-07 08:41:56,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.839080459770115) internal successors, (334), 86 states have internal predecessors, (334), 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 08:41:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2021-11-07 08:41:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-11-07 08:41:56,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:41:56,884 INFO L513 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:41:56,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-07 08:41:57,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:57,112 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:41:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:41:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash -219787676, now seen corresponding path program 55 times [2021-11-07 08:41:57,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:41:57,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518305] [2021-11-07 08:41:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:41:57,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:41:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:58,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:41:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:41:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7764 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-11-07 08:41:58,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:41:58,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518305] [2021-11-07 08:41:58,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:41:58,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524715614] [2021-11-07 08:41:58,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:41:58,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:41:58,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:41:58,863 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:41:58,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-07 08:42:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:02,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 08:42:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7764 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-11-07 08:42:02,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524715614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:02,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:42:02,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 64 [2021-11-07 08:42:02,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98665757] [2021-11-07 08:42:02,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-07 08:42:02,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:02,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-07 08:42:02,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 08:42:02,974 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand has 64 states, 64 states have (on average 3.9375) internal successors, (252), 63 states have internal predecessors, (252), 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 08:42:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:03,732 INFO L93 Difference]: Finished difference Result 535 states and 536 transitions. [2021-11-07 08:42:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-07 08:42:03,733 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.9375) internal successors, (252), 63 states have internal predecessors, (252), 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 329 [2021-11-07 08:42:03,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:03,735 INFO L225 Difference]: With dead ends: 535 [2021-11-07 08:42:03,735 INFO L226 Difference]: Without dead ends: 535 [2021-11-07 08:42:03,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 08:42:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-07 08:42:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 334. [2021-11-07 08:42:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 330 states have (on average 1.006060606060606) internal successors, (332), 330 states have internal predecessors, (332), 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 08:42:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 335 transitions. [2021-11-07 08:42:03,739 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 335 transitions. Word has length 329 [2021-11-07 08:42:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:03,739 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 335 transitions. [2021-11-07 08:42:03,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.9375) internal successors, (252), 63 states have internal predecessors, (252), 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 08:42:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 335 transitions. [2021-11-07 08:42:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-11-07 08:42:03,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:03,741 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:03,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-07 08:42:03,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:03,944 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:42:03,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash 463604737, now seen corresponding path program 56 times [2021-11-07 08:42:03,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:03,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995567369] [2021-11-07 08:42:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:03,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:05,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-11-07 08:42:05,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:05,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995567369] [2021-11-07 08:42:05,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995567369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:05,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99454178] [2021-11-07 08:42:05,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:42:05,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:05,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:05,625 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:05,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-07 08:42:09,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:42:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:09,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-07 08:42:09,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-11-07 08:42:09,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99454178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:09,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:42:09,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 65 [2021-11-07 08:42:09,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376185893] [2021-11-07 08:42:09,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-07 08:42:09,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:09,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-07 08:42:09,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 08:42:09,962 INFO L87 Difference]: Start difference. First operand 334 states and 335 transitions. Second operand has 65 states, 65 states have (on average 3.9384615384615387) internal successors, (256), 64 states have internal predecessors, (256), 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 08:42:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:10,826 INFO L93 Difference]: Finished difference Result 544 states and 545 transitions. [2021-11-07 08:42:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 08:42:10,827 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.9384615384615387) internal successors, (256), 64 states have internal predecessors, (256), 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 333 [2021-11-07 08:42:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:10,829 INFO L225 Difference]: With dead ends: 544 [2021-11-07 08:42:10,829 INFO L226 Difference]: Without dead ends: 544 [2021-11-07 08:42:10,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 08:42:10,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-07 08:42:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 338. [2021-11-07 08:42:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 334 states have (on average 1.0059880239520957) internal successors, (336), 334 states have internal predecessors, (336), 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 08:42:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 339 transitions. [2021-11-07 08:42:10,835 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 339 transitions. Word has length 333 [2021-11-07 08:42:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:10,836 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 339 transitions. [2021-11-07 08:42:10,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.9384615384615387) internal successors, (256), 64 states have internal predecessors, (256), 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 08:42:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 339 transitions. [2021-11-07 08:42:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-11-07 08:42:10,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:10,838 INFO L513 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:10,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-11-07 08:42:11,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:11,040 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:42:11,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:11,041 INFO L85 PathProgramCache]: Analyzing trace with hash -556027106, now seen corresponding path program 57 times [2021-11-07 08:42:11,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:11,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557616803] [2021-11-07 08:42:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:11,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:12,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8242 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-11-07 08:42:12,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:12,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557616803] [2021-11-07 08:42:12,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557616803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:12,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750398072] [2021-11-07 08:42:12,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:42:12,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:12,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:12,807 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:12,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 08:42:18,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-07 08:42:18,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:18,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 08:42:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8242 backedges. 181 proven. 861 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2021-11-07 08:42:20,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750398072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:20,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:42:20,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 27] total 91 [2021-11-07 08:42:20,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853587372] [2021-11-07 08:42:20,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-07 08:42:20,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:20,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-07 08:42:20,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3525, Invalid=4665, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 08:42:20,210 INFO L87 Difference]: Start difference. First operand 338 states and 339 transitions. Second operand has 91 states, 91 states have (on average 3.8461538461538463) internal successors, (350), 90 states have internal predecessors, (350), 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 08:42:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:24,854 INFO L93 Difference]: Finished difference Result 556 states and 558 transitions. [2021-11-07 08:42:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-07 08:42:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.8461538461538463) internal successors, (350), 90 states have internal predecessors, (350), 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 337 [2021-11-07 08:42:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:24,858 INFO L225 Difference]: With dead ends: 556 [2021-11-07 08:42:24,858 INFO L226 Difference]: Without dead ends: 556 [2021-11-07 08:42:24,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8031 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9053, Invalid=14817, Unknown=0, NotChecked=0, Total=23870 [2021-11-07 08:42:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-07 08:42:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 346. [2021-11-07 08:42:24,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 342 states have (on average 1.0058479532163742) internal successors, (344), 342 states have internal predecessors, (344), 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 08:42:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 347 transitions. [2021-11-07 08:42:24,866 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 347 transitions. Word has length 337 [2021-11-07 08:42:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:24,866 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 347 transitions. [2021-11-07 08:42:24,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.8461538461538463) internal successors, (350), 90 states have internal predecessors, (350), 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 08:42:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 347 transitions. [2021-11-07 08:42:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-07 08:42:24,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:24,870 INFO L513 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:24,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:25,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-07 08:42:25,096 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:42:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1077347374, now seen corresponding path program 58 times [2021-11-07 08:42:25,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:25,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135799680] [2021-11-07 08:42:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:25,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:27,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8572 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-11-07 08:42:27,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:27,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135799680] [2021-11-07 08:42:27,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135799680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:27,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570959695] [2021-11-07 08:42:27,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:42:27,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:27,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:27,042 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:27,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-07 08:42:54,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:42:54,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:42:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 08:42:54,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:42:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8572 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-11-07 08:42:55,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570959695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:55,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:42:55,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65] total 67 [2021-11-07 08:42:55,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587295291] [2021-11-07 08:42:55,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-07 08:42:55,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:42:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-07 08:42:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 08:42:55,254 INFO L87 Difference]: Start difference. First operand 346 states and 347 transitions. Second operand has 67 states, 67 states have (on average 3.9402985074626864) internal successors, (264), 66 states have internal predecessors, (264), 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 08:42:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:42:56,204 INFO L93 Difference]: Finished difference Result 561 states and 562 transitions. [2021-11-07 08:42:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 08:42:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.9402985074626864) internal successors, (264), 66 states have internal predecessors, (264), 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 345 [2021-11-07 08:42:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:42:56,208 INFO L225 Difference]: With dead ends: 561 [2021-11-07 08:42:56,208 INFO L226 Difference]: Without dead ends: 561 [2021-11-07 08:42:56,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 08:42:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-07 08:42:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 350. [2021-11-07 08:42:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 346 states have (on average 1.0057803468208093) internal successors, (348), 346 states have internal predecessors, (348), 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 08:42:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 351 transitions. [2021-11-07 08:42:56,213 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 351 transitions. Word has length 345 [2021-11-07 08:42:56,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:42:56,214 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 351 transitions. [2021-11-07 08:42:56,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.9402985074626864) internal successors, (264), 66 states have internal predecessors, (264), 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 08:42:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 351 transitions. [2021-11-07 08:42:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-11-07 08:42:56,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:42:56,216 INFO L513 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:42:56,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-07 08:42:56,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-07 08:42:56,416 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:42:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:42:56,417 INFO L85 PathProgramCache]: Analyzing trace with hash -208150673, now seen corresponding path program 59 times [2021-11-07 08:42:56,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:42:56,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441805218] [2021-11-07 08:42:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:42:56,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:42:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:58,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:42:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:42:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8821 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-11-07 08:42:58,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:42:58,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441805218] [2021-11-07 08:42:58,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441805218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:42:58,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389449352] [2021-11-07 08:42:58,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:42:58,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:42:58,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:42:58,295 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:42:58,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-07 08:47:00,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2021-11-07 08:47:00,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:47:00,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-07 08:47:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:47:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8821 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-11-07 08:47:01,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389449352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:47:01,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:47:01,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66] total 68 [2021-11-07 08:47:01,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73978326] [2021-11-07 08:47:01,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-07 08:47:01,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:47:01,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-07 08:47:01,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 08:47:01,778 INFO L87 Difference]: Start difference. First operand 350 states and 351 transitions. Second operand has 68 states, 68 states have (on average 3.9411764705882355) internal successors, (268), 67 states have internal predecessors, (268), 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 08:47:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:47:02,715 INFO L93 Difference]: Finished difference Result 570 states and 571 transitions. [2021-11-07 08:47:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-07 08:47:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.9411764705882355) internal successors, (268), 67 states have internal predecessors, (268), 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 349 [2021-11-07 08:47:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:47:02,718 INFO L225 Difference]: With dead ends: 570 [2021-11-07 08:47:02,718 INFO L226 Difference]: Without dead ends: 570 [2021-11-07 08:47:02,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 08:47:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-07 08:47:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 354. [2021-11-07 08:47:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 350 states have (on average 1.0057142857142858) internal successors, (352), 350 states have internal predecessors, (352), 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 08:47:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 355 transitions. [2021-11-07 08:47:02,724 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 355 transitions. Word has length 349 [2021-11-07 08:47:02,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:47:02,724 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 355 transitions. [2021-11-07 08:47:02,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.9411764705882355) internal successors, (268), 67 states have internal predecessors, (268), 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 08:47:02,725 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 355 transitions. [2021-11-07 08:47:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-11-07 08:47:02,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:47:02,727 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:47:02,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-07 08:47:02,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe8c70fa-7045-490a-92cd-b588a082db70/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:47:02,927 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 1 more)] === [2021-11-07 08:47:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:47:02,928 INFO L85 PathProgramCache]: Analyzing trace with hash 400665740, now seen corresponding path program 60 times [2021-11-07 08:47:02,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:47:02,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893169407] [2021-11-07 08:47:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:47:02,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:47:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat