./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0232-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg --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 01db24b1589b54f78ea9acc56548e9023dc94ca9b67a9629bccf00110df292f7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:39:47,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:39:47,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:39:47,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:39:47,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:39:47,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:39:47,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:39:47,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:39:47,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:39:47,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:39:47,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:39:47,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:39:47,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:39:47,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:39:47,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:39:47,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:39:47,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:39:47,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:39:47,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:39:47,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:39:47,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:39:47,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:39:47,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:39:47,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:39:47,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:39:47,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:39:47,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:39:47,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:39:47,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:39:47,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:39:47,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:39:47,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:39:47,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:39:47,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:39:47,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:39:47,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:39:47,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:39:47,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:39:47,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:39:47,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:39:47,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:39:47,551 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 08:39:47,604 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:39:47,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:39:47,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:39:47,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:39:47,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:39:47,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:39:47,615 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:39:47,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:39:47,615 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:39:47,616 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:39:47,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:39:47,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:39:47,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:39:47,618 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:39:47,618 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:39:47,618 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:39:47,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:39:47,619 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:39:47,619 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:39:47,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:39:47,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:39:47,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:39:47,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:39:47,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:39:47,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:39:47,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:39:47,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:39:47,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:39:47,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:39:47,623 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_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01db24b1589b54f78ea9acc56548e9023dc94ca9b67a9629bccf00110df292f7 [2021-10-28 08:39:47,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:39:47,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:39:47,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:39:47,988 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:39:47,989 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:39:47,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/memsafety/test-0232-3.i [2021-10-28 08:39:48,076 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/data/59f373caf/7cd13614dd7a4b46a3220c1249abb6ce/FLAGf936d5d2b [2021-10-28 08:39:48,835 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:39:48,835 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/sv-benchmarks/c/memsafety/test-0232-3.i [2021-10-28 08:39:48,852 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/data/59f373caf/7cd13614dd7a4b46a3220c1249abb6ce/FLAGf936d5d2b [2021-10-28 08:39:49,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/data/59f373caf/7cd13614dd7a4b46a3220c1249abb6ce [2021-10-28 08:39:49,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:39:49,122 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:39:49,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:39:49,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:39:49,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:39:49,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:39:49" (1/1) ... [2021-10-28 08:39:49,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2082045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:39:49, skipping insertion in model container [2021-10-28 08:39:49,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:39:49" (1/1) ... [2021-10-28 08:39:49,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:39:49,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:39:49,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:39:49,654 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:39:49,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:39:49,767 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:39:49,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:39:49 WrapperNode [2021-10-28 08:39:49,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:39:49,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:39:49,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:39:49,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:39:49,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:39:49" (1/1) ... [2021-10-28 08:39:49,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:39:49" (1/1) ... [2021-10-28 08:39:49,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:39:49" (1/1) ... [2021-10-28 08:39:49,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:39:49" (1/1) ... [2021-10-28 08:39:49,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:39:49" (1/1) ... [2021-10-28 08:39:49,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:39:49" (1/1) ... [2021-10-28 08:39:49,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:39:49" (1/1) ... [2021-10-28 08:39:49,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:39:49,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:39:49,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:39:49,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:39:49,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:39:49" (1/1) ... [2021-10-28 08:39:49,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:39:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:39:49,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:39:49,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:39:50,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:39:50,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:39:50,007 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:39:50,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:39:50,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:39:50,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 08:39:50,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 08:39:50,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 08:39:50,009 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-10-28 08:39:50,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:39:50,009 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:39:50,010 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:39:50,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 08:39:50,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 08:39:50,011 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:39:50,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:39:50,011 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:39:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:39:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:39:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:39:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:39:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:39:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:39:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:39:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:39:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:39:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:39:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:39:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:39:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:39:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:39:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:39:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:39:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:39:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 08:39:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 08:39:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 08:39:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:39:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:39:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:39:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:39:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:39:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:39:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:39:50,016 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:39:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:39:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:39:50,017 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:39:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:39:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:39:50,018 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:39:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:39:50,019 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:39:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:39:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:39:50,020 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:39:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:39:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:39:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:39:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:39:50,021 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:39:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:39:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:39:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:39:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:39:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:39:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:39:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:39:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:39:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:39:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:39:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:39:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:39:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:39:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:39:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:39:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:39:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:39:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:39:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:39:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:39:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:39:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:39:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:39:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:39:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:39:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:39:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:39:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:39:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:39:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:39:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:39:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:39:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:39:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:39:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:39:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:39:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:39:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:39:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:39:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:39:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:39:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:39:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:39:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:39:50,034 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:39:50,034 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:39:50,035 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:39:50,035 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:39:50,035 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:39:50,035 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:39:50,036 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:39:50,036 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:39:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:39:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:39:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:39:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:39:50,038 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:39:50,038 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:39:50,038 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:39:50,038 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:39:50,038 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:39:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:39:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-10-28 08:39:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:39:50,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:39:50,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:39:50,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:39:50,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-28 08:39:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:39:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:39:50,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:39:50,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:39:50,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:39:50,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:39:50,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:39:50,812 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 08:39:50,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:39:50 BoogieIcfgContainer [2021-10-28 08:39:50,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:39:50,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:39:50,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:39:50,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:39:50,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:39:49" (1/3) ... [2021-10-28 08:39:50,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70858140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:39:50, skipping insertion in model container [2021-10-28 08:39:50,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:39:49" (2/3) ... [2021-10-28 08:39:50,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70858140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:39:50, skipping insertion in model container [2021-10-28 08:39:50,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:39:50" (3/3) ... [2021-10-28 08:39:50,830 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-3.i [2021-10-28 08:39:50,836 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:39:50,836 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-10-28 08:39:50,882 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:39:50,888 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 [2021-10-28 08:39:50,889 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-10-28 08:39:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 53 states have (on average 2.150943396226415) internal successors, (114), 107 states have internal predecessors, (114), 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) [2021-10-28 08:39:50,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 08:39:50,914 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:50,915 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:50,915 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:50,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1500158253, now seen corresponding path program 1 times [2021-10-28 08:39:50,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:50,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012624181] [2021-10-28 08:39:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:50,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:51,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:51,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:51,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012624181] [2021-10-28 08:39:51,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012624181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:51,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:51,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:39:51,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068057777] [2021-10-28 08:39:51,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:39:51,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:39:51,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:39:51,258 INFO L87 Difference]: Start difference. First operand has 114 states, 53 states have (on average 2.150943396226415) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:51,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:51,531 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2021-10-28 08:39:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:39:51,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-10-28 08:39:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:51,544 INFO L225 Difference]: With dead ends: 114 [2021-10-28 08:39:51,545 INFO L226 Difference]: Without dead ends: 111 [2021-10-28 08:39:51,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:39:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-28 08:39:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-10-28 08:39:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 51 states have (on average 2.156862745098039) internal successors, (110), 105 states have internal predecessors, (110), 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) [2021-10-28 08:39:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-10-28 08:39:51,605 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 8 [2021-10-28 08:39:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:51,606 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-10-28 08:39:51,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-10-28 08:39:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:39:51,607 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:51,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:51,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:39:51,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash -739601476, now seen corresponding path program 1 times [2021-10-28 08:39:51,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:51,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811589024] [2021-10-28 08:39:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:51,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:51,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:51,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:51,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811589024] [2021-10-28 08:39:51,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811589024] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:51,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:51,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:39:51,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104546429] [2021-10-28 08:39:51,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:39:51,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:39:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:39:51,802 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:52,094 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2021-10-28 08:39:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:39:52,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-28 08:39:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:52,097 INFO L225 Difference]: With dead ends: 105 [2021-10-28 08:39:52,097 INFO L226 Difference]: Without dead ends: 105 [2021-10-28 08:39:52,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:39:52,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-28 08:39:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-10-28 08:39:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 52 states have (on average 2.0) internal successors, (104), 98 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:39:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-10-28 08:39:52,109 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 9 [2021-10-28 08:39:52,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:52,109 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-10-28 08:39:52,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-10-28 08:39:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:39:52,111 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:52,111 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:52,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:39:52,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash -739601475, now seen corresponding path program 1 times [2021-10-28 08:39:52,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:52,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879361423] [2021-10-28 08:39:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:52,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:52,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:52,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:52,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879361423] [2021-10-28 08:39:52,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879361423] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:52,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:52,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:39:52,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559524825] [2021-10-28 08:39:52,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:39:52,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:52,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:39:52,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:39:52,291 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:52,740 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2021-10-28 08:39:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:39:52,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-10-28 08:39:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:52,750 INFO L225 Difference]: With dead ends: 133 [2021-10-28 08:39:52,751 INFO L226 Difference]: Without dead ends: 133 [2021-10-28 08:39:52,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:39:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-28 08:39:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-10-28 08:39:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 105 states have internal predecessors, (117), 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) [2021-10-28 08:39:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2021-10-28 08:39:52,772 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 9 [2021-10-28 08:39:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:52,775 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2021-10-28 08:39:52,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2021-10-28 08:39:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:39:52,776 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:52,776 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:52,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:39:52,777 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:52,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1452809171, now seen corresponding path program 1 times [2021-10-28 08:39:52,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:52,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637774551] [2021-10-28 08:39:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:52,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:52,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:52,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:52,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637774551] [2021-10-28 08:39:52,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637774551] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:52,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:52,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:39:52,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470656273] [2021-10-28 08:39:52,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:39:52,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:52,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:39:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:39:52,890 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:53,078 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2021-10-28 08:39:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:39:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 08:39:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:53,080 INFO L225 Difference]: With dead ends: 107 [2021-10-28 08:39:53,080 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 08:39:53,080 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 [2021-10-28 08:39:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 08:39:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-28 08:39:53,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 63 states have (on average 1.7777777777777777) internal successors, (112), 101 states have internal predecessors, (112), 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) [2021-10-28 08:39:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-10-28 08:39:53,088 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 10 [2021-10-28 08:39:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:53,089 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-10-28 08:39:53,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-10-28 08:39:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:39:53,090 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:53,090 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:53,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:39:53,090 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1452809170, now seen corresponding path program 1 times [2021-10-28 08:39:53,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:53,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98862223] [2021-10-28 08:39:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:53,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:53,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:53,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:53,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98862223] [2021-10-28 08:39:53,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98862223] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:53,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:53,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:39:53,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101300332] [2021-10-28 08:39:53,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:39:53,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:39:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:39:53,149 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:53,300 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2021-10-28 08:39:53,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:39:53,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 08:39:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:53,302 INFO L225 Difference]: With dead ends: 103 [2021-10-28 08:39:53,302 INFO L226 Difference]: Without dead ends: 103 [2021-10-28 08:39:53,302 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 [2021-10-28 08:39:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-28 08:39:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-10-28 08:39:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 97 states have internal predecessors, (107), 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) [2021-10-28 08:39:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2021-10-28 08:39:53,311 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 10 [2021-10-28 08:39:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:53,311 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2021-10-28 08:39:53,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2021-10-28 08:39:53,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:39:53,313 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:53,313 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:53,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:39:53,313 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2099912409, now seen corresponding path program 1 times [2021-10-28 08:39:53,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:53,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615583386] [2021-10-28 08:39:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:53,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:53,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:53,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:53,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615583386] [2021-10-28 08:39:53,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615583386] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:53,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:53,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:39:53,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137003385] [2021-10-28 08:39:53,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:39:53,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:53,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:39:53,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:39:53,495 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:53,870 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-10-28 08:39:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:39:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 08:39:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:53,872 INFO L225 Difference]: With dead ends: 114 [2021-10-28 08:39:53,872 INFO L226 Difference]: Without dead ends: 114 [2021-10-28 08:39:53,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:39:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-28 08:39:53,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2021-10-28 08:39:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 69 states have (on average 1.6376811594202898) internal successors, (113), 103 states have internal predecessors, (113), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:39:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-10-28 08:39:53,882 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 15 [2021-10-28 08:39:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:53,882 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-10-28 08:39:53,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-10-28 08:39:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 08:39:53,883 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:53,883 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:53,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 08:39:53,884 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:53,885 INFO L85 PathProgramCache]: Analyzing trace with hash -672497070, now seen corresponding path program 1 times [2021-10-28 08:39:53,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:53,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036937197] [2021-10-28 08:39:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:53,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:54,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:54,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:54,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036937197] [2021-10-28 08:39:54,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036937197] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:54,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:54,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:39:54,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245491502] [2021-10-28 08:39:54,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:39:54,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:54,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:39:54,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:39:54,048 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:54,275 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-10-28 08:39:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:39:54,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 08:39:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:54,279 INFO L225 Difference]: With dead ends: 109 [2021-10-28 08:39:54,279 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 08:39:54,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:39:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 08:39:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-10-28 08:39:54,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 99 states have internal predecessors, (109), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:39:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2021-10-28 08:39:54,296 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 16 [2021-10-28 08:39:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:54,297 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2021-10-28 08:39:54,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:39:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2021-10-28 08:39:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 08:39:54,299 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:54,300 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:54,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 08:39:54,300 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:54,301 INFO L85 PathProgramCache]: Analyzing trace with hash 685617470, now seen corresponding path program 1 times [2021-10-28 08:39:54,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:54,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369930884] [2021-10-28 08:39:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:54,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:54,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:54,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:39:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:54,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:54,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369930884] [2021-10-28 08:39:54,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369930884] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:54,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:54,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:39:54,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059566761] [2021-10-28 08:39:54,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:39:54,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:39:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:39:54,513 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:54,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:54,902 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2021-10-28 08:39:54,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:39:54,903 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-28 08:39:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:54,904 INFO L225 Difference]: With dead ends: 123 [2021-10-28 08:39:54,904 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 08:39:54,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:39:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 08:39:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2021-10-28 08:39:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:39:54,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2021-10-28 08:39:54,911 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 24 [2021-10-28 08:39:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:54,913 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2021-10-28 08:39:54,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2021-10-28 08:39:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 08:39:54,915 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:54,915 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:54,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 08:39:54,915 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:54,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:54,916 INFO L85 PathProgramCache]: Analyzing trace with hash 685617471, now seen corresponding path program 1 times [2021-10-28 08:39:54,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:54,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274467368] [2021-10-28 08:39:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:54,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:55,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:55,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:39:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:55,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:55,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274467368] [2021-10-28 08:39:55,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274467368] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:55,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:55,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:39:55,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959801376] [2021-10-28 08:39:55,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:39:55,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:55,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:39:55,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:39:55,113 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:55,597 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-10-28 08:39:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:39:55,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-28 08:39:55,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:55,600 INFO L225 Difference]: With dead ends: 128 [2021-10-28 08:39:55,600 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 08:39:55,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:39:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 08:39:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 104. [2021-10-28 08:39:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 66 states have (on average 1.621212121212121) internal successors, (107), 97 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:39:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2021-10-28 08:39:55,615 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 24 [2021-10-28 08:39:55,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:55,616 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2021-10-28 08:39:55,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2021-10-28 08:39:55,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 08:39:55,618 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:55,618 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:55,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 08:39:55,618 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1780011878, now seen corresponding path program 1 times [2021-10-28 08:39:55,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:55,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898962068] [2021-10-28 08:39:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:55,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:55,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:55,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:39:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:55,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:55,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898962068] [2021-10-28 08:39:55,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898962068] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:55,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:55,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:39:55,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493674783] [2021-10-28 08:39:55,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:39:55,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:55,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:39:55,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:39:55,748 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:55,996 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2021-10-28 08:39:55,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:39:55,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-10-28 08:39:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:55,998 INFO L225 Difference]: With dead ends: 99 [2021-10-28 08:39:55,999 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 08:39:55,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:39:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 08:39:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-10-28 08:39:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 91 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:39:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2021-10-28 08:39:56,004 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 26 [2021-10-28 08:39:56,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:56,004 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2021-10-28 08:39:56,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2021-10-28 08:39:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 08:39:56,006 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:56,006 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:56,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 08:39:56,007 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1780011234, now seen corresponding path program 1 times [2021-10-28 08:39:56,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:56,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066881691] [2021-10-28 08:39:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:56,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:56,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:56,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:39:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:56,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:56,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066881691] [2021-10-28 08:39:56,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066881691] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:56,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:56,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:39:56,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039855050] [2021-10-28 08:39:56,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:39:56,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:56,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:39:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:39:56,126 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:56,442 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-28 08:39:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:39:56,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-10-28 08:39:56,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:56,444 INFO L225 Difference]: With dead ends: 96 [2021-10-28 08:39:56,445 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 08:39:56,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:39:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 08:39:56,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-28 08:39:56,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 89 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:39:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-10-28 08:39:56,450 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 26 [2021-10-28 08:39:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:56,451 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-10-28 08:39:56,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-10-28 08:39:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 08:39:56,458 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:56,458 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:56,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 08:39:56,459 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1634399054, now seen corresponding path program 1 times [2021-10-28 08:39:56,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:56,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173964355] [2021-10-28 08:39:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:56,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:56,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:56,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:39:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:56,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:56,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173964355] [2021-10-28 08:39:56,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173964355] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:56,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:56,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:39:56,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308886793] [2021-10-28 08:39:56,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:39:56,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:56,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:39:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:39:56,729 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:57,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:57,097 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-10-28 08:39:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:39:57,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-10-28 08:39:57,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:57,099 INFO L225 Difference]: With dead ends: 95 [2021-10-28 08:39:57,099 INFO L226 Difference]: Without dead ends: 95 [2021-10-28 08:39:57,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:39:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-28 08:39:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-10-28 08:39:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 58 states have (on average 1.603448275862069) internal successors, (93), 88 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:39:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2021-10-28 08:39:57,109 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 27 [2021-10-28 08:39:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:57,109 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2021-10-28 08:39:57,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2021-10-28 08:39:57,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 08:39:57,115 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:57,115 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:57,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 08:39:57,115 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:57,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1634399055, now seen corresponding path program 1 times [2021-10-28 08:39:57,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:57,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668454267] [2021-10-28 08:39:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:57,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:57,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:57,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:39:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:57,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:57,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668454267] [2021-10-28 08:39:57,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668454267] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:57,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:57,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:39:57,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399210994] [2021-10-28 08:39:57,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:39:57,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:57,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:39:57,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:39:57,236 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:57,496 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-28 08:39:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:39:57,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-10-28 08:39:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:57,498 INFO L225 Difference]: With dead ends: 94 [2021-10-28 08:39:57,499 INFO L226 Difference]: Without dead ends: 94 [2021-10-28 08:39:57,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:39:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-28 08:39:57,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-28 08:39:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 87 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:39:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-10-28 08:39:57,503 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 27 [2021-10-28 08:39:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:57,504 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-10-28 08:39:57,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:39:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-10-28 08:39:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 08:39:57,505 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:57,505 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:57,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 08:39:57,506 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:57,506 INFO L85 PathProgramCache]: Analyzing trace with hash 873236865, now seen corresponding path program 1 times [2021-10-28 08:39:57,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:57,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281590160] [2021-10-28 08:39:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:57,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:57,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:57,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:39:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:57,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:57,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281590160] [2021-10-28 08:39:57,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281590160] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:39:57,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:39:57,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-28 08:39:57,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879622123] [2021-10-28 08:39:57,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:39:57,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:39:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:39:57,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:39:57,949 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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) [2021-10-28 08:39:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:39:58,949 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2021-10-28 08:39:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 08:39:58,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 28 [2021-10-28 08:39:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:39:58,952 INFO L225 Difference]: With dead ends: 142 [2021-10-28 08:39:58,952 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 08:39:58,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-10-28 08:39:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 08:39:58,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 109. [2021-10-28 08:39:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 101 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 08:39:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-10-28 08:39:58,959 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 28 [2021-10-28 08:39:58,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:39:58,960 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-10-28 08:39:58,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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) [2021-10-28 08:39:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-10-28 08:39:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 08:39:58,962 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:39:58,962 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:39:58,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 08:39:58,963 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:39:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:39:58,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1313641447, now seen corresponding path program 1 times [2021-10-28 08:39:58,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:39:58,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166384549] [2021-10-28 08:39:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:58,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:39:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:59,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:39:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:59,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:39:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:39:59,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:39:59,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166384549] [2021-10-28 08:39:59,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166384549] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:39:59,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704829548] [2021-10-28 08:39:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:39:59,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:39:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:39:59,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:39:59,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:39:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:39:59,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 08:39:59,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:39:59,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 08:39:59,824 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-10-28 08:39:59,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-10-28 08:39:59,987 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:39:59,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-10-28 08:40:00,176 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:40:00,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-10-28 08:40:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:00,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704829548] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:40:00,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:40:00,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-28 08:40:00,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902259339] [2021-10-28 08:40:00,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:40:00,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:00,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:40:00,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:40:00,222 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 08:40:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:01,236 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-10-28 08:40:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:40:01,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-10-28 08:40:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:01,238 INFO L225 Difference]: With dead ends: 113 [2021-10-28 08:40:01,238 INFO L226 Difference]: Without dead ends: 113 [2021-10-28 08:40:01,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-10-28 08:40:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-28 08:40:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2021-10-28 08:40:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 100 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:40:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2021-10-28 08:40:01,248 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 29 [2021-10-28 08:40:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:01,249 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2021-10-28 08:40:01,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 08:40:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2021-10-28 08:40:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 08:40:01,252 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:01,252 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:01,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:40:01,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 08:40:01,465 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1313641446, now seen corresponding path program 1 times [2021-10-28 08:40:01,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:01,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800864147] [2021-10-28 08:40:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:01,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:01,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:01,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:01,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:01,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800864147] [2021-10-28 08:40:01,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800864147] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:40:01,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104056689] [2021-10-28 08:40:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:01,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:40:01,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:40:01,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:40:01,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:40:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:01,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-28 08:40:01,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:40:02,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-28 08:40:02,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:40:02,379 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-28 08:40:02,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-10-28 08:40:02,410 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:40:02,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-28 08:40:02,555 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:40:02,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 08:40:02,570 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:40:02,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2021-10-28 08:40:02,770 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:40:02,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2021-10-28 08:40:02,780 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 08:40:02,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-10-28 08:40:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:02,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104056689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:40:02,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:40:02,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-10-28 08:40:02,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410022477] [2021-10-28 08:40:02,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 08:40:02,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:02,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 08:40:02,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:40:02,835 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 08:40:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:04,220 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-10-28 08:40:04,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:40:04,220 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-10-28 08:40:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:04,221 INFO L225 Difference]: With dead ends: 109 [2021-10-28 08:40:04,222 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 08:40:04,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 08:40:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 08:40:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-10-28 08:40:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 99 states have internal predecessors, (105), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:40:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-10-28 08:40:04,226 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 29 [2021-10-28 08:40:04,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:04,227 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-10-28 08:40:04,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 08:40:04,227 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-10-28 08:40:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 08:40:04,228 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:04,228 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:04,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:40:04,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:40:04,429 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:04,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1300539121, now seen corresponding path program 1 times [2021-10-28 08:40:04,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:04,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328381470] [2021-10-28 08:40:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:04,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:04,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:04,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:04,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:04,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328381470] [2021-10-28 08:40:04,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328381470] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:40:04,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:40:04,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-28 08:40:04,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518995568] [2021-10-28 08:40:04,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:40:04,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:04,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:40:04,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:40:04,786 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2021-10-28 08:40:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:05,743 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2021-10-28 08:40:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 08:40:05,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 29 [2021-10-28 08:40:05,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:05,745 INFO L225 Difference]: With dead ends: 142 [2021-10-28 08:40:05,745 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 08:40:05,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-10-28 08:40:05,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 08:40:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2021-10-28 08:40:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 73 states have (on average 1.452054794520548) internal successors, (106), 100 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:40:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2021-10-28 08:40:05,752 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 29 [2021-10-28 08:40:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:05,753 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2021-10-28 08:40:05,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2021-10-28 08:40:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2021-10-28 08:40:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 08:40:05,754 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:05,754 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:05,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 08:40:05,755 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1662007171, now seen corresponding path program 1 times [2021-10-28 08:40:05,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:05,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235567586] [2021-10-28 08:40:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:05,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:05,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:05,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:06,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:06,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235567586] [2021-10-28 08:40:06,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235567586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:40:06,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:40:06,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-28 08:40:06,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324241219] [2021-10-28 08:40:06,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:40:06,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:06,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:40:06,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:40:06,070 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:40:06,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:06,607 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2021-10-28 08:40:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:40:06,608 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-10-28 08:40:06,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:06,609 INFO L225 Difference]: With dead ends: 119 [2021-10-28 08:40:06,609 INFO L226 Difference]: Without dead ends: 119 [2021-10-28 08:40:06,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:40:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-28 08:40:06,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2021-10-28 08:40:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.445945945945946) internal successors, (107), 101 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:40:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-10-28 08:40:06,615 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 30 [2021-10-28 08:40:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:06,616 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-10-28 08:40:06,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:40:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-10-28 08:40:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 08:40:06,617 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:06,617 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:06,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 08:40:06,618 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:06,618 INFO L85 PathProgramCache]: Analyzing trace with hash -17385164, now seen corresponding path program 1 times [2021-10-28 08:40:06,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:06,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202006299] [2021-10-28 08:40:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:06,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:06,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:06,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:06,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:06,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202006299] [2021-10-28 08:40:06,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202006299] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:40:06,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:40:06,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:40:06,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268223520] [2021-10-28 08:40:06,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:40:06,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:06,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:40:06,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:40:06,777 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2021-10-28 08:40:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:07,089 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-10-28 08:40:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:40:07,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 31 [2021-10-28 08:40:07,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:07,091 INFO L225 Difference]: With dead ends: 109 [2021-10-28 08:40:07,091 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 08:40:07,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:40:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 08:40:07,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-10-28 08:40:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 100 states have internal predecessors, (106), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:40:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2021-10-28 08:40:07,096 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 31 [2021-10-28 08:40:07,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:07,096 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2021-10-28 08:40:07,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2021-10-28 08:40:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2021-10-28 08:40:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 08:40:07,097 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:07,097 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:07,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 08:40:07,098 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:07,098 INFO L85 PathProgramCache]: Analyzing trace with hash -17385163, now seen corresponding path program 1 times [2021-10-28 08:40:07,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:07,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596645] [2021-10-28 08:40:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:07,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:07,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:07,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:07,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:07,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596645] [2021-10-28 08:40:07,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596645] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:40:07,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:40:07,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:40:07,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272636528] [2021-10-28 08:40:07,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:40:07,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:07,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:40:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:40:07,176 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:40:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:07,346 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2021-10-28 08:40:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:40:07,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-10-28 08:40:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:07,348 INFO L225 Difference]: With dead ends: 101 [2021-10-28 08:40:07,348 INFO L226 Difference]: Without dead ends: 101 [2021-10-28 08:40:07,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:40:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-28 08:40:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-28 08:40:07,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 93 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:40:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2021-10-28 08:40:07,352 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 31 [2021-10-28 08:40:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:07,353 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2021-10-28 08:40:07,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:40:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2021-10-28 08:40:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 08:40:07,353 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:07,354 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:07,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 08:40:07,354 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr15ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:07,354 INFO L85 PathProgramCache]: Analyzing trace with hash -538940057, now seen corresponding path program 1 times [2021-10-28 08:40:07,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:07,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281742442] [2021-10-28 08:40:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:07,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:07,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:07,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:07,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:07,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281742442] [2021-10-28 08:40:07,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281742442] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:40:07,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:40:07,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:40:07,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448896931] [2021-10-28 08:40:07,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:40:07,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:40:07,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:40:07,485 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:40:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:07,738 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-10-28 08:40:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:40:07,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-10-28 08:40:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:07,740 INFO L225 Difference]: With dead ends: 100 [2021-10-28 08:40:07,740 INFO L226 Difference]: Without dead ends: 100 [2021-10-28 08:40:07,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:40:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-28 08:40:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-28 08:40:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 92 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:40:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-10-28 08:40:07,744 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 32 [2021-10-28 08:40:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:07,745 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-10-28 08:40:07,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:40:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-10-28 08:40:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 08:40:07,745 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:07,746 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:07,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 08:40:07,746 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr16ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:07,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:07,746 INFO L85 PathProgramCache]: Analyzing trace with hash 472727508, now seen corresponding path program 1 times [2021-10-28 08:40:07,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:07,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284665796] [2021-10-28 08:40:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:07,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:07,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:07,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:07,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:07,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284665796] [2021-10-28 08:40:07,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284665796] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:40:07,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:40:07,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:40:07,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926289683] [2021-10-28 08:40:07,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:40:07,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:07,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:40:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:40:07,913 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:40:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:08,189 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2021-10-28 08:40:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:40:08,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-10-28 08:40:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:08,193 INFO L225 Difference]: With dead ends: 99 [2021-10-28 08:40:08,193 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 08:40:08,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:40:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 08:40:08,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-10-28 08:40:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 91 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:40:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-10-28 08:40:08,198 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 33 [2021-10-28 08:40:08,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:08,198 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-10-28 08:40:08,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:40:08,199 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-10-28 08:40:08,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 08:40:08,200 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:08,200 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:08,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 08:40:08,200 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:08,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:08,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1769650953, now seen corresponding path program 1 times [2021-10-28 08:40:08,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:08,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565591150] [2021-10-28 08:40:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:08,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:08,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:08,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:08,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:08,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565591150] [2021-10-28 08:40:08,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565591150] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:40:08,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:40:08,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 08:40:08,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922409189] [2021-10-28 08:40:08,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:40:08,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:40:08,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:40:08,579 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:40:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:09,128 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-10-28 08:40:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 08:40:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-10-28 08:40:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:09,130 INFO L225 Difference]: With dead ends: 124 [2021-10-28 08:40:09,130 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 08:40:09,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:40:09,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 08:40:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2021-10-28 08:40:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 111 states have internal predecessors, (120), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 08:40:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-10-28 08:40:09,137 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 34 [2021-10-28 08:40:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:09,138 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-10-28 08:40:09,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:40:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-10-28 08:40:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 08:40:09,139 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:09,139 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:09,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-28 08:40:09,140 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:09,140 INFO L85 PathProgramCache]: Analyzing trace with hash -975395209, now seen corresponding path program 1 times [2021-10-28 08:40:09,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:09,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012480388] [2021-10-28 08:40:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:09,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:09,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:09,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:09,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:09,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012480388] [2021-10-28 08:40:09,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012480388] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:40:09,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:40:09,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:40:09,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184088023] [2021-10-28 08:40:09,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:40:09,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:09,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:40:09,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:40:09,258 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-10-28 08:40:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:09,581 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-10-28 08:40:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:40:09,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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 35 [2021-10-28 08:40:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:09,584 INFO L225 Difference]: With dead ends: 126 [2021-10-28 08:40:09,584 INFO L226 Difference]: Without dead ends: 126 [2021-10-28 08:40:09,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:40:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-28 08:40:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-10-28 08:40:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 116 states have internal predecessors, (125), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 08:40:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2021-10-28 08:40:09,591 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 35 [2021-10-28 08:40:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:09,592 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2021-10-28 08:40:09,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-10-28 08:40:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2021-10-28 08:40:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 08:40:09,593 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:09,593 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:09,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-28 08:40:09,594 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:09,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1581588223, now seen corresponding path program 1 times [2021-10-28 08:40:09,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:09,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195044359] [2021-10-28 08:40:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:09,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:09,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:09,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:10,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:10,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195044359] [2021-10-28 08:40:10,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195044359] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:40:10,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:40:10,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-28 08:40:10,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816141841] [2021-10-28 08:40:10,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:40:10,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:10,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:40:10,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:40:10,114 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-10-28 08:40:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:10,840 INFO L93 Difference]: Finished difference Result 137 states and 144 transitions. [2021-10-28 08:40:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 08:40:10,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 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 39 [2021-10-28 08:40:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:10,842 INFO L225 Difference]: With dead ends: 137 [2021-10-28 08:40:10,842 INFO L226 Difference]: Without dead ends: 137 [2021-10-28 08:40:10,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-10-28 08:40:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-28 08:40:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2021-10-28 08:40:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 102 states have (on average 1.2647058823529411) internal successors, (129), 119 states have internal predecessors, (129), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 08:40:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2021-10-28 08:40:10,849 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 39 [2021-10-28 08:40:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:10,850 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2021-10-28 08:40:10,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-10-28 08:40:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2021-10-28 08:40:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 08:40:10,851 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:10,851 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:10,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-28 08:40:10,851 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:10,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1581588867, now seen corresponding path program 1 times [2021-10-28 08:40:10,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:10,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683038296] [2021-10-28 08:40:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:10,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:11,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:11,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:11,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:11,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683038296] [2021-10-28 08:40:11,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683038296] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:40:11,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:40:11,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-10-28 08:40:11,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307338918] [2021-10-28 08:40:11,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:40:11,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:11,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:40:11,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:40:11,760 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 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) [2021-10-28 08:40:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:12,655 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-10-28 08:40:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 08:40:12,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 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 39 [2021-10-28 08:40:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:12,656 INFO L225 Difference]: With dead ends: 133 [2021-10-28 08:40:12,657 INFO L226 Difference]: Without dead ends: 114 [2021-10-28 08:40:12,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:40:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-28 08:40:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-10-28 08:40:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 104 states have internal predecessors, (113), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 08:40:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2021-10-28 08:40:12,663 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 39 [2021-10-28 08:40:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:12,663 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2021-10-28 08:40:12,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 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) [2021-10-28 08:40:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2021-10-28 08:40:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 08:40:12,664 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:12,664 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:12,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-28 08:40:12,665 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:12,665 INFO L85 PathProgramCache]: Analyzing trace with hash -425207857, now seen corresponding path program 1 times [2021-10-28 08:40:12,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:12,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984586797] [2021-10-28 08:40:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:12,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:12,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:12,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:12,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:40:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:40:12,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:12,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984586797] [2021-10-28 08:40:12,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984586797] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:40:12,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314005395] [2021-10-28 08:40:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:12,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:40:12,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:40:12,881 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:40:12,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:40:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:13,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 08:40:13,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:40:13,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 08:40:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:13,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314005395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:40:13,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:40:13,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-10-28 08:40:13,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127268240] [2021-10-28 08:40:13,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:40:13,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:13,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:40:13,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:40:13,420 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:40:14,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:14,097 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2021-10-28 08:40:14,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 08:40:14,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2021-10-28 08:40:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:14,098 INFO L225 Difference]: With dead ends: 89 [2021-10-28 08:40:14,098 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 08:40:14,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 08:40:14,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 08:40:14,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-10-28 08:40:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 64 states have (on average 1.3125) internal successors, (84), 81 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:40:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2021-10-28 08:40:14,103 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 42 [2021-10-28 08:40:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:14,103 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2021-10-28 08:40:14,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:40:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2021-10-28 08:40:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 08:40:14,104 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:14,104 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:14,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:40:14,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:40:14,324 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:14,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:14,325 INFO L85 PathProgramCache]: Analyzing trace with hash -44963474, now seen corresponding path program 1 times [2021-10-28 08:40:14,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:14,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474975949] [2021-10-28 08:40:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:14,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:14,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:14,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:14,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:40:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:40:15,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:15,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474975949] [2021-10-28 08:40:15,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474975949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:40:15,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742635468] [2021-10-28 08:40:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:15,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:40:15,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:40:15,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:40:15,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:40:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:15,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-28 08:40:15,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:40:15,475 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 [2021-10-28 08:40:15,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 08:40:15,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-28 08:40:15,868 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-28 08:40:15,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-10-28 08:40:15,983 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:40:15,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-28 08:40:16,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 106 [2021-10-28 08:40:17,034 INFO L354 Elim1Store]: treesize reduction 489, result has 8.9 percent of original size [2021-10-28 08:40:17,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 246 treesize of output 170 [2021-10-28 08:40:17,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 104 [2021-10-28 08:40:17,058 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-10-28 08:40:17,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 110 [2021-10-28 08:40:17,070 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-28 08:40:17,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 77 [2021-10-28 08:40:17,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2021-10-28 08:40:17,663 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-28 08:40:17,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 36 [2021-10-28 08:40:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:17,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742635468] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:40:17,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:40:17,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2021-10-28 08:40:17,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133945684] [2021-10-28 08:40:17,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 08:40:17,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:17,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 08:40:17,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 08:40:17,673 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 38 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:40:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:40:20,681 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2021-10-28 08:40:20,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-28 08:40:20,683 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-10-28 08:40:20,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:40:20,684 INFO L225 Difference]: With dead ends: 149 [2021-10-28 08:40:20,685 INFO L226 Difference]: Without dead ends: 149 [2021-10-28 08:40:20,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=450, Invalid=4380, Unknown=0, NotChecked=0, Total=4830 [2021-10-28 08:40:20,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-28 08:40:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 88. [2021-10-28 08:40:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.296875) internal successors, (83), 80 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:40:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-10-28 08:40:20,692 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 45 [2021-10-28 08:40:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:40:20,692 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-10-28 08:40:20,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:40:20,693 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-10-28 08:40:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 08:40:20,694 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:40:20,694 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:40:20,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:40:20,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 08:40:20,908 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:40:20,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:40:20,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1393867612, now seen corresponding path program 1 times [2021-10-28 08:40:20,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:40:20,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480760475] [2021-10-28 08:40:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:20,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:40:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:40:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:21,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:40:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:21,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:40:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:40:22,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:40:22,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480760475] [2021-10-28 08:40:22,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480760475] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:40:22,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218021413] [2021-10-28 08:40:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:40:22,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:40:22,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:40:22,544 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:40:22,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:40:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:40:22,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-28 08:40:22,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:40:23,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 08:40:23,237 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-28 08:40:23,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2021-10-28 08:40:23,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:40:23,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 08:40:23,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-10-28 08:40:23,545 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:40:23,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-10-28 08:40:23,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:40:34,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:40:34,729 INFO L354 Elim1Store]: treesize reduction 227, result has 11.0 percent of original size [2021-10-28 08:40:34,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 109 [2021-10-28 08:40:34,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 147 [2021-10-28 08:40:34,752 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-10-28 08:40:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 75 [2021-10-28 08:40:35,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2021-10-28 08:40:35,316 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-10-28 08:40:35,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 30 [2021-10-28 08:40:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:40:35,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218021413] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:40:35,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:40:35,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2021-10-28 08:40:35,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369182020] [2021-10-28 08:40:35,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 08:40:35,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:40:35,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 08:40:35,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1380, Unknown=9, NotChecked=0, Total=1482 [2021-10-28 08:40:35,341 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:41:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:41:54,815 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-10-28 08:41:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 08:41:54,817 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2021-10-28 08:41:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:41:54,818 INFO L225 Difference]: With dead ends: 114 [2021-10-28 08:41:54,818 INFO L226 Difference]: Without dead ends: 114 [2021-10-28 08:41:54,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=364, Invalid=3771, Unknown=25, NotChecked=0, Total=4160 [2021-10-28 08:41:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-28 08:41:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2021-10-28 08:41:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.28125) internal successors, (82), 79 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:41:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-10-28 08:41:54,825 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 46 [2021-10-28 08:41:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:41:54,825 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-10-28 08:41:54,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:41:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-10-28 08:41:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 08:41:54,827 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:41:54,827 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:41:54,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:41:55,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 08:41:55,040 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:41:55,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:41:55,041 INFO L85 PathProgramCache]: Analyzing trace with hash -260222928, now seen corresponding path program 1 times [2021-10-28 08:41:55,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:41:55,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707291776] [2021-10-28 08:41:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:55,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:41:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:55,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:41:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:55,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:41:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:55,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:41:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:41:56,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:41:56,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707291776] [2021-10-28 08:41:56,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707291776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:41:56,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633135886] [2021-10-28 08:41:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:41:56,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:41:56,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:41:56,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:41:56,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:41:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:41:56,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-28 08:41:56,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:41:56,620 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 [2021-10-28 08:41:56,789 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 [2021-10-28 08:41:56,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-28 08:41:57,002 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-28 08:41:57,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2021-10-28 08:41:57,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:41:57,135 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:41:57,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-28 08:41:58,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:41:59,580 INFO L354 Elim1Store]: treesize reduction 429, result has 10.1 percent of original size [2021-10-28 08:41:59,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 210 treesize of output 152 [2021-10-28 08:41:59,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 251 treesize of output 227 [2021-10-28 08:41:59,599 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-28 08:41:59,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 76 [2021-10-28 08:41:59,658 INFO L354 Elim1Store]: treesize reduction 210, result has 25.5 percent of original size [2021-10-28 08:41:59,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 90 treesize of output 128 [2021-10-28 08:42:00,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 129 [2021-10-28 08:42:00,292 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-10-28 08:42:00,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 49 [2021-10-28 08:42:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:42:00,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633135886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:00,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:42:00,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2021-10-28 08:42:00,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458163946] [2021-10-28 08:42:00,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 08:42:00,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 08:42:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 08:42:00,520 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 43 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:42:20,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:42:20,796 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-10-28 08:42:20,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 08:42:20,797 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 47 [2021-10-28 08:42:20,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:42:20,798 INFO L225 Difference]: With dead ends: 87 [2021-10-28 08:42:20,798 INFO L226 Difference]: Without dead ends: 87 [2021-10-28 08:42:20,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 08:42:20,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-28 08:42:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-10-28 08:42:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.265625) internal successors, (81), 78 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 08:42:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-10-28 08:42:20,803 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 47 [2021-10-28 08:42:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:42:20,803 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-10-28 08:42:20,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:42:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-10-28 08:42:20,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 08:42:20,804 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:42:20,804 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:42:20,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:42:21,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:42:21,016 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:42:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:42:21,016 INFO L85 PathProgramCache]: Analyzing trace with hash -735988426, now seen corresponding path program 1 times [2021-10-28 08:42:21,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:42:21,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804473238] [2021-10-28 08:42:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:21,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:42:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:21,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:42:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:21,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:42:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:21,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:42:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:42:22,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:42:22,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804473238] [2021-10-28 08:42:22,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804473238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:22,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635942469] [2021-10-28 08:42:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:42:22,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:42:22,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:42:22,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:42:22,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:42:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:42:22,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-28 08:42:22,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:42:22,875 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 [2021-10-28 08:42:23,100 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 [2021-10-28 08:42:23,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-28 08:42:23,320 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-28 08:42:23,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2021-10-28 08:42:23,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:42:23,429 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:42:23,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-28 08:42:50,535 INFO L354 Elim1Store]: treesize reduction 439, result has 8.0 percent of original size [2021-10-28 08:42:50,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 204 treesize of output 136 [2021-10-28 08:42:50,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 209 [2021-10-28 08:42:50,570 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-28 08:42:50,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 120 [2021-10-28 08:42:50,589 INFO L354 Elim1Store]: treesize reduction 84, result has 30.6 percent of original size [2021-10-28 08:42:50,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 84 [2021-10-28 08:42:51,358 INFO L354 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2021-10-28 08:42:51,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 54 [2021-10-28 08:42:51,546 INFO L354 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2021-10-28 08:42:51,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 136 treesize of output 76 [2021-10-28 08:42:51,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2021-10-28 08:42:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:42:52,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635942469] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:42:52,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:42:52,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2021-10-28 08:42:52,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95738787] [2021-10-28 08:42:52,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-28 08:42:52,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:42:52,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-28 08:42:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1996, Unknown=13, NotChecked=0, Total=2162 [2021-10-28 08:42:52,610 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 47 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:44:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:19,095 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2021-10-28 08:44:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 08:44:19,096 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2021-10-28 08:44:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:19,097 INFO L225 Difference]: With dead ends: 142 [2021-10-28 08:44:19,097 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 08:44:19,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 67.4s TimeCoverageRelationStatistics Valid=403, Invalid=4680, Unknown=29, NotChecked=0, Total=5112 [2021-10-28 08:44:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 08:44:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-10-28 08:44:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 80 states have (on average 1.225) internal successors, (98), 94 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:44:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2021-10-28 08:44:19,104 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 51 [2021-10-28 08:44:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:19,105 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2021-10-28 08:44:19,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.9545454545454546) internal successors, (86), 43 states have internal predecessors, (86), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:44:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2021-10-28 08:44:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 08:44:19,106 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:19,106 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:19,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:19,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 08:44:19,312 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:44:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1340804630, now seen corresponding path program 1 times [2021-10-28 08:44:19,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:19,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803853032] [2021-10-28 08:44:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:19,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:19,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:44:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:19,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:44:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:19,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:44:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:44:19,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:19,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803853032] [2021-10-28 08:44:19,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803853032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:19,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094402023] [2021-10-28 08:44:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:19,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:19,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:19,528 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:19,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:44:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:20,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 08:44:20,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:20,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 08:44:20,613 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:44:20,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-28 08:44:20,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-10-28 08:44:20,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-10-28 08:44:20,799 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:44:20,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 08:44:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:44:20,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094402023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:20,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:44:20,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-10-28 08:44:20,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571484339] [2021-10-28 08:44:20,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 08:44:20,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 08:44:20,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:44:20,832 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 16 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:44:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:21,269 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-10-28 08:44:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:44:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2021-10-28 08:44:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:21,271 INFO L225 Difference]: With dead ends: 128 [2021-10-28 08:44:21,271 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 08:44:21,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-10-28 08:44:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 08:44:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-10-28 08:44:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.2125) internal successors, (97), 93 states have internal predecessors, (97), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:44:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-10-28 08:44:21,276 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 52 [2021-10-28 08:44:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:21,277 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-10-28 08:44:21,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:44:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-10-28 08:44:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 08:44:21,278 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:21,278 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:21,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:21,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:21,504 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:44:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash -685098252, now seen corresponding path program 1 times [2021-10-28 08:44:21,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:21,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579698539] [2021-10-28 08:44:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:21,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:22,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:44:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:22,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:44:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:22,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:44:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:44:23,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:23,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579698539] [2021-10-28 08:44:23,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579698539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:23,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517073964] [2021-10-28 08:44:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:23,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:23,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:23,551 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:23,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:44:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:24,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-28 08:44:24,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:24,189 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 [2021-10-28 08:44:24,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-28 08:44:24,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:44:24,750 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-28 08:44:24,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 41 [2021-10-28 08:44:24,946 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-10-28 08:44:24,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-10-28 08:44:34,137 INFO L354 Elim1Store]: treesize reduction 439, result has 8.0 percent of original size [2021-10-28 08:44:34,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 228 treesize of output 144 [2021-10-28 08:44:34,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 249 [2021-10-28 08:44:34,164 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-28 08:44:34,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 192 treesize of output 70 [2021-10-28 08:44:34,177 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-10-28 08:44:34,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 106 [2021-10-28 08:44:35,110 INFO L354 Elim1Store]: treesize reduction 41, result has 48.8 percent of original size [2021-10-28 08:44:35,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 62 [2021-10-28 08:44:35,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2021-10-28 08:44:35,681 INFO L354 Elim1Store]: treesize reduction 71, result has 15.5 percent of original size [2021-10-28 08:44:35,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 42 [2021-10-28 08:44:35,854 INFO L354 Elim1Store]: treesize reduction 28, result has 30.0 percent of original size [2021-10-28 08:44:35,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 102 treesize of output 65 [2021-10-28 08:44:36,136 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-28 08:44:36,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 40 [2021-10-28 08:44:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:44:36,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517073964] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:36,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:44:36,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 57 [2021-10-28 08:44:36,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675076042] [2021-10-28 08:44:36,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-10-28 08:44:36,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-10-28 08:44:36,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3106, Unknown=3, NotChecked=0, Total=3306 [2021-10-28 08:44:36,266 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 58 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:44:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:44:45,260 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2021-10-28 08:44:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 08:44:45,260 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2021-10-28 08:44:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:44:45,261 INFO L225 Difference]: With dead ends: 139 [2021-10-28 08:44:45,261 INFO L226 Difference]: Without dead ends: 139 [2021-10-28 08:44:45,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=574, Invalid=8165, Unknown=3, NotChecked=0, Total=8742 [2021-10-28 08:44:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-28 08:44:45,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 107. [2021-10-28 08:44:45,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 85 states have (on average 1.223529411764706) internal successors, (104), 98 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:44:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-10-28 08:44:45,267 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 56 [2021-10-28 08:44:45,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:44:45,268 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-10-28 08:44:45,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 54 states have internal predecessors, (96), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:44:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-10-28 08:44:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 08:44:45,269 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:44:45,269 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:44:45,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:44:45,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 08:44:45,492 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:44:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:44:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash -685098251, now seen corresponding path program 1 times [2021-10-28 08:44:45,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:44:45,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038625282] [2021-10-28 08:44:45,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:45,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:44:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:45,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:44:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:45,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:44:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:45,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:44:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:44:46,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:44:46,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038625282] [2021-10-28 08:44:46,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038625282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:46,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056076172] [2021-10-28 08:44:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:44:46,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:44:46,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:44:46,543 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:44:46,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:44:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:44:47,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-28 08:44:47,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:44:47,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:44:47,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:44:47,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:44:47,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-28 08:44:50,661 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-28 08:44:50,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 80 [2021-10-28 08:44:52,737 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-28 08:44:52,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 59 [2021-10-28 08:44:52,765 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:44:52,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-28 08:44:53,670 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-28 08:44:53,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 77 [2021-10-28 08:44:53,696 INFO L354 Elim1Store]: treesize reduction 72, result has 13.3 percent of original size [2021-10-28 08:44:53,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 53 [2021-10-28 08:44:53,850 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:44:53,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 47 [2021-10-28 08:44:53,860 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:44:53,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-10-28 08:44:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:44:53,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056076172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:44:53,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:44:53,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2021-10-28 08:44:53,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97099716] [2021-10-28 08:44:53,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 08:44:53,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:44:53,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 08:44:53,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1210, Unknown=1, NotChecked=0, Total=1332 [2021-10-28 08:44:53,884 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 37 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:45:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:45:06,967 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2021-10-28 08:45:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 08:45:06,968 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 56 [2021-10-28 08:45:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:45:06,969 INFO L225 Difference]: With dead ends: 139 [2021-10-28 08:45:06,969 INFO L226 Difference]: Without dead ends: 139 [2021-10-28 08:45:06,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=343, Invalid=3194, Unknown=3, NotChecked=0, Total=3540 [2021-10-28 08:45:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-28 08:45:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 111. [2021-10-28 08:45:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 102 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:45:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2021-10-28 08:45:06,974 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 56 [2021-10-28 08:45:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:45:06,975 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2021-10-28 08:45:06,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:45:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2021-10-28 08:45:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 08:45:06,976 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:45:06,976 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:45:07,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:45:07,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:07,204 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:45:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:45:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash -685098896, now seen corresponding path program 1 times [2021-10-28 08:45:07,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:45:07,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712550486] [2021-10-28 08:45:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:07,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:45:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:07,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:45:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:07,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:45:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:07,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:45:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:45:07,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:07,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712550486] [2021-10-28 08:45:07,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712550486] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:07,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420463956] [2021-10-28 08:45:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:45:07,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:45:07,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:45:07,920 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:45:07,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:45:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:45:08,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-28 08:45:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:08,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 08:45:21,922 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 08:45:21,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 36 [2021-10-28 08:45:21,930 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:45:21,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-10-28 08:45:22,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-28 08:45:22,574 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:45:22,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 26 [2021-10-28 08:45:22,676 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:45:22,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-10-28 08:45:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:45:22,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420463956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:22,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:45:22,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2021-10-28 08:45:22,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141625841] [2021-10-28 08:45:22,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 08:45:22,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:22,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 08:45:22,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1074, Unknown=7, NotChecked=0, Total=1190 [2021-10-28 08:45:22,688 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand has 35 states, 34 states have (on average 2.5) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:46:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:02,000 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2021-10-28 08:46:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 08:46:02,000 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 56 [2021-10-28 08:46:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:02,001 INFO L225 Difference]: With dead ends: 135 [2021-10-28 08:46:02,001 INFO L226 Difference]: Without dead ends: 135 [2021-10-28 08:46:02,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=322, Invalid=2855, Unknown=15, NotChecked=0, Total=3192 [2021-10-28 08:46:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-28 08:46:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2021-10-28 08:46:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 89 states have (on average 1.202247191011236) internal successors, (107), 102 states have internal predecessors, (107), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:46:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2021-10-28 08:46:02,015 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 56 [2021-10-28 08:46:02,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:02,016 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2021-10-28 08:46:02,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 32 states have internal predecessors, (85), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:46:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2021-10-28 08:46:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 08:46:02,017 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:02,018 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:02,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:46:02,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 08:46:02,244 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr35ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:46:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1896261991, now seen corresponding path program 1 times [2021-10-28 08:46:02,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:46:02,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243475946] [2021-10-28 08:46:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:02,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:46:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:02,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:46:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:02,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:46:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:02,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:46:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:46:03,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:46:03,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243475946] [2021-10-28 08:46:03,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243475946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:46:03,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456227596] [2021-10-28 08:46:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:03,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:46:03,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:46:03,182 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:46:03,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:46:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 08:46:04,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:04,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:46:09,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-10-28 08:46:09,714 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-28 08:46:09,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 33 [2021-10-28 08:46:09,732 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:46:09,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-28 08:46:09,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-10-28 08:46:10,374 INFO L354 Elim1Store]: treesize reduction 72, result has 13.3 percent of original size [2021-10-28 08:46:10,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 31 [2021-10-28 08:46:10,578 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:46:10,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-10-28 08:46:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:46:10,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456227596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:46:10,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:46:10,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2021-10-28 08:46:10,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958775447] [2021-10-28 08:46:10,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 08:46:10,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:46:10,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 08:46:10,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1128, Unknown=3, NotChecked=0, Total=1260 [2021-10-28 08:46:10,586 INFO L87 Difference]: Start difference. First operand 111 states and 116 transitions. Second operand has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:46:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:44,289 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2021-10-28 08:46:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 08:46:44,289 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 60 [2021-10-28 08:46:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:44,290 INFO L225 Difference]: With dead ends: 134 [2021-10-28 08:46:44,291 INFO L226 Difference]: Without dead ends: 134 [2021-10-28 08:46:44,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=367, Invalid=3046, Unknown=9, NotChecked=0, Total=3422 [2021-10-28 08:46:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-28 08:46:44,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2021-10-28 08:46:44,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.2525252525252526) internal successors, (124), 112 states have internal predecessors, (124), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:46:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2021-10-28 08:46:44,298 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 60 [2021-10-28 08:46:44,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:44,299 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2021-10-28 08:46:44,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 33 states have internal predecessors, (95), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:46:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2021-10-28 08:46:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 08:46:44,300 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:44,300 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:44,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:46:44,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 08:46:44,522 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:46:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:44,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1896248059, now seen corresponding path program 1 times [2021-10-28 08:46:44,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:46:44,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142762887] [2021-10-28 08:46:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:44,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:46:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:44,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:46:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:44,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:46:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:45,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:46:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:46:46,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:46:46,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142762887] [2021-10-28 08:46:46,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142762887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:46:46,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021560072] [2021-10-28 08:46:46,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:46,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:46:46,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:46:46,048 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:46:46,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 08:46:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:46,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-28 08:46:46,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:47,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:46:47,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:46:47,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:46:47,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-10-28 08:46:47,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:46:47,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-28 08:46:47,656 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-28 08:46:47,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 50 [2021-10-28 08:46:47,681 INFO L354 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2021-10-28 08:46:47,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 70 [2021-10-28 08:46:47,862 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:46:47,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-28 08:46:48,694 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-10-28 08:46:48,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 73 [2021-10-28 08:46:48,709 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:46:48,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 44 [2021-10-28 08:46:49,205 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:46:49,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 47 [2021-10-28 08:46:49,212 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:46:49,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-10-28 08:46:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:46:49,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021560072] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:46:49,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:46:49,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2021-10-28 08:46:49,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843162671] [2021-10-28 08:46:49,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 08:46:49,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:46:49,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 08:46:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 08:46:49,228 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 40 states, 38 states have (on average 2.736842105263158) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:46:52,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:52,840 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2021-10-28 08:46:52,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 08:46:52,840 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.736842105263158) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 60 [2021-10-28 08:46:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:52,841 INFO L225 Difference]: With dead ends: 136 [2021-10-28 08:46:52,842 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 08:46:52,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=434, Invalid=4122, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 08:46:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 08:46:52,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 121. [2021-10-28 08:46:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.2424242424242424) internal successors, (123), 112 states have internal predecessors, (123), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:46:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2021-10-28 08:46:52,847 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 60 [2021-10-28 08:46:52,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:52,848 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2021-10-28 08:46:52,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.736842105263158) internal successors, (104), 37 states have internal predecessors, (104), 4 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:46:52,848 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2021-10-28 08:46:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-28 08:46:52,849 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:52,850 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:52,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:46:53,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 08:46:53,076 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:46:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:53,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1896248058, now seen corresponding path program 1 times [2021-10-28 08:46:53,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:46:53,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130180556] [2021-10-28 08:46:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:53,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:46:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:53,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:46:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:53,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:46:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:53,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:46:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 08:46:53,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:46:53,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130180556] [2021-10-28 08:46:53,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130180556] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:46:53,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:46:53,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:46:53,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42953405] [2021-10-28 08:46:53,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:46:53,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:46:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:46:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:46:53,210 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:46:53,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:46:53,551 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2021-10-28 08:46:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:46:53,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2021-10-28 08:46:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:46:53,553 INFO L225 Difference]: With dead ends: 127 [2021-10-28 08:46:53,553 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 08:46:53,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:46:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 08:46:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2021-10-28 08:46:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 111 states have internal predecessors, (121), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:46:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2021-10-28 08:46:53,558 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 60 [2021-10-28 08:46:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:46:53,558 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2021-10-28 08:46:53,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:46:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2021-10-28 08:46:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 08:46:53,559 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:46:53,559 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:46:53,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-28 08:46:53,559 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:46:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:46:53,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1345420281, now seen corresponding path program 1 times [2021-10-28 08:46:53,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:46:53,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505836058] [2021-10-28 08:46:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:53,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:46:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:53,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:46:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:53,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:46:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:53,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:46:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:46:54,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:46:54,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505836058] [2021-10-28 08:46:54,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505836058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:46:54,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497152693] [2021-10-28 08:46:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:46:54,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:46:54,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:46:54,468 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:46:54,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 08:46:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:46:55,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 08:46:55,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:46:55,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 08:46:55,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-28 08:47:13,917 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 08:47:13,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 40 [2021-10-28 08:47:13,928 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:47:13,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-28 08:47:14,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-28 08:47:14,613 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 08:47:14,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 30 [2021-10-28 08:47:14,829 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:47:14,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-10-28 08:47:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:47:14,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497152693] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:14,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:47:14,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2021-10-28 08:47:14,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978250991] [2021-10-28 08:47:14,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 08:47:14,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:14,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 08:47:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1076, Unknown=9, NotChecked=0, Total=1190 [2021-10-28 08:47:14,840 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 35 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:49:13,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:49:13,954 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2021-10-28 08:49:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 08:49:13,954 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 61 [2021-10-28 08:49:13,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:49:13,955 INFO L225 Difference]: With dead ends: 130 [2021-10-28 08:49:13,956 INFO L226 Difference]: Without dead ends: 130 [2021-10-28 08:49:13,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=327, Invalid=2949, Unknown=30, NotChecked=0, Total=3306 [2021-10-28 08:49:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-28 08:49:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2021-10-28 08:49:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 100 states have (on average 1.22) internal successors, (122), 112 states have internal predecessors, (122), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:49:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2021-10-28 08:49:13,960 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 61 [2021-10-28 08:49:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:49:13,960 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2021-10-28 08:49:13,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 08:49:13,961 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2021-10-28 08:49:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 08:49:13,962 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:49:13,962 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:49:14,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:49:14,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 08:49:14,188 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr30ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:49:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:49:14,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1345852280, now seen corresponding path program 1 times [2021-10-28 08:49:14,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:49:14,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328854558] [2021-10-28 08:49:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:14,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:49:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:14,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:49:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:15,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:49:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:15,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:49:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:49:16,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:49:16,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328854558] [2021-10-28 08:49:16,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328854558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:16,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817568582] [2021-10-28 08:49:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:49:16,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:49:16,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:49:16,278 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:49:16,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 08:49:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:49:17,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 102 conjunts are in the unsatisfiable core [2021-10-28 08:49:17,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:49:17,312 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 [2021-10-28 08:49:17,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-28 08:49:17,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:49:17,807 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:49:17,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-28 08:49:41,661 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 08:49:41,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 133 [2021-10-28 08:49:41,723 INFO L354 Elim1Store]: treesize reduction 490, result has 9.8 percent of original size [2021-10-28 08:49:41,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 188 [2021-10-28 08:49:41,729 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-28 08:49:41,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 93 [2021-10-28 08:49:41,740 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-10-28 08:49:41,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 79 [2021-10-28 08:49:43,176 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-10-28 08:49:43,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 133 treesize of output 90 [2021-10-28 08:49:43,221 INFO L354 Elim1Store]: treesize reduction 184, result has 8.9 percent of original size [2021-10-28 08:49:43,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 93 treesize of output 94 [2021-10-28 08:49:43,605 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:49:43,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 62 [2021-10-28 08:49:43,838 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-10-28 08:49:43,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 36 [2021-10-28 08:49:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:49:43,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817568582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:49:43,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:49:43,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 54 [2021-10-28 08:49:43,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057924653] [2021-10-28 08:49:43,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 08:49:43,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:49:43,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 08:49:43,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2772, Unknown=9, NotChecked=0, Total=2970 [2021-10-28 08:49:43,848 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 55 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:50:24,152 WARN L207 SmtUtils]: Spent 6.54 s on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2021-10-28 08:50:27,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:27,630 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2021-10-28 08:50:27,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 08:50:27,631 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 61 [2021-10-28 08:50:27,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:27,632 INFO L225 Difference]: With dead ends: 160 [2021-10-28 08:50:27,632 INFO L226 Difference]: Without dead ends: 160 [2021-10-28 08:50:27,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=634, Invalid=7013, Unknown=9, NotChecked=0, Total=7656 [2021-10-28 08:50:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-28 08:50:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2021-10-28 08:50:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 100 states have (on average 1.21) internal successors, (121), 112 states have internal predecessors, (121), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:50:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2021-10-28 08:50:27,639 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 61 [2021-10-28 08:50:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:27,639 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2021-10-28 08:50:27,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:50:27,640 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2021-10-28 08:50:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 08:50:27,641 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:27,641 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:27,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:50:27,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 08:50:27,852 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr37ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:50:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1241644393, now seen corresponding path program 1 times [2021-10-28 08:50:27,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:27,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666669484] [2021-10-28 08:50:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:27,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:27,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:50:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:27,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:50:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:27,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:50:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 08:50:27,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:27,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666669484] [2021-10-28 08:50:27,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666669484] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:50:27,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:50:27,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:50:27,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781022358] [2021-10-28 08:50:27,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:50:27,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:50:27,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:50:27,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:50:27,984 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 7 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:50:28,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:50:28,323 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2021-10-28 08:50:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:50:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2021-10-28 08:50:28,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:50:28,324 INFO L225 Difference]: With dead ends: 128 [2021-10-28 08:50:28,325 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 08:50:28,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:50:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 08:50:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-10-28 08:50:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 117 states have internal predecessors, (128), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:50:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2021-10-28 08:50:28,328 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 62 [2021-10-28 08:50:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:50:28,329 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2021-10-28 08:50:28,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 08:50:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2021-10-28 08:50:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 08:50:28,330 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:50:28,330 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:50:28,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-10-28 08:50:28,330 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr31ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:50:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:50:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1228252410, now seen corresponding path program 1 times [2021-10-28 08:50:28,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:50:28,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138211663] [2021-10-28 08:50:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:28,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:50:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:29,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:50:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:29,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:50:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:29,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:50:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:50:30,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:50:30,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138211663] [2021-10-28 08:50:30,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138211663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:50:30,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639548011] [2021-10-28 08:50:30,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:50:30,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:50:30,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:50:30,675 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:50:30,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 08:50:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:50:31,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 94 conjunts are in the unsatisfiable core [2021-10-28 08:50:31,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:50:31,840 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 [2021-10-28 08:50:32,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 08:50:32,245 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-28 08:50:32,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2021-10-28 08:50:32,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 08:50:32,403 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 08:50:32,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-28 08:50:32,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 08:50:32,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2021-10-28 08:51:01,689 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-28 08:51:01,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 102 [2021-10-28 08:51:01,703 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-28 08:51:01,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 87 [2021-10-28 08:51:01,717 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-10-28 08:51:01,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 71 [2021-10-28 08:51:02,867 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-10-28 08:51:02,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 79 [2021-10-28 08:51:02,918 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-10-28 08:51:02,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 73 [2021-10-28 08:51:03,631 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 08:51:03,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-10-28 08:51:03,813 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-10-28 08:51:03,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 31 [2021-10-28 08:51:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:51:03,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639548011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:51:03,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:51:03,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 23] total 51 [2021-10-28 08:51:03,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103863332] [2021-10-28 08:51:03,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 08:51:03,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:51:03,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 08:51:03,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2489, Unknown=14, NotChecked=0, Total=2652 [2021-10-28 08:51:03,867 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 52 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:52:30,124 WARN L207 SmtUtils]: Spent 8.44 s on a formula simplification. DAG size of input: 117 DAG size of output: 85 [2021-10-28 08:52:42,341 WARN L207 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-10-28 08:52:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:55,122 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2021-10-28 08:52:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-28 08:52:55,129 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 62 [2021-10-28 08:52:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:55,131 INFO L225 Difference]: With dead ends: 179 [2021-10-28 08:52:55,131 INFO L226 Difference]: Without dead ends: 179 [2021-10-28 08:52:55,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2498 ImplicationChecksByTransitivity, 92.4s TimeCoverageRelationStatistics Valid=862, Invalid=9414, Unknown=26, NotChecked=0, Total=10302 [2021-10-28 08:52:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-28 08:52:55,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 126. [2021-10-28 08:52:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 117 states have internal predecessors, (127), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:52:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2021-10-28 08:52:55,137 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 62 [2021-10-28 08:52:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:55,137 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2021-10-28 08:52:55,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 08:52:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2021-10-28 08:52:55,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 08:52:55,138 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:55,139 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:55,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:55,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-28 08:52:55,352 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:52:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:55,353 INFO L85 PathProgramCache]: Analyzing trace with hash -163729334, now seen corresponding path program 1 times [2021-10-28 08:52:55,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:55,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659725460] [2021-10-28 08:52:55,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:55,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:55,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:52:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:55,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 08:52:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:55,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-10-28 08:52:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 08:52:55,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:55,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659725460] [2021-10-28 08:52:55,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659725460] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:55,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:55,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:52:55,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305521870] [2021-10-28 08:52:55,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:52:55,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:55,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:52:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:52:55,567 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:52:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:55,864 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2021-10-28 08:52:55,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:52:55,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2021-10-28 08:52:55,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:55,866 INFO L225 Difference]: With dead ends: 125 [2021-10-28 08:52:55,866 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 08:52:55,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:52:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 08:52:55,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-10-28 08:52:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 105 states have (on average 1.2) internal successors, (126), 116 states have internal predecessors, (126), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 08:52:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-10-28 08:52:55,872 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 63 [2021-10-28 08:52:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:55,872 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-10-28 08:52:55,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:52:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-10-28 08:52:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 08:52:55,874 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:55,874 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:55,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-10-28 08:52:55,874 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr32ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 50 more)] === [2021-10-28 08:52:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:55,875 INFO L85 PathProgramCache]: Analyzing trace with hash -578880822, now seen corresponding path program 1 times [2021-10-28 08:52:55,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:55,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087051396] [2021-10-28 08:52:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:55,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:52:55,928 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:52:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:52:56,044 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:52:56,044 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:52:56,045 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,048 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 08:52:56,048 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 08:52:56,048 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 08:52:56,049 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 08:52:56,049 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 08:52:56,049 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 08:52:56,049 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 08:52:56,049 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 08:52:56,049 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 08:52:56,050 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 08:52:56,050 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,050 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,050 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 08:52:56,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 08:52:56,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 08:52:56,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 08:52:56,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-28 08:52:56,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 08:52:56,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-28 08:52:56,052 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-28 08:52:56,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-28 08:52:56,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-28 08:52:56,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-28 08:52:56,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-28 08:52:56,053 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-28 08:52:56,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-28 08:52:56,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-28 08:52:56,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-28 08:52:56,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 08:52:56,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-28 08:52:56,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-28 08:52:56,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:52:56,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION [2021-10-28 08:52:56,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION [2021-10-28 08:52:56,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION [2021-10-28 08:52:56,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION [2021-10-28 08:52:56,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION [2021-10-28 08:52:56,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION [2021-10-28 08:52:56,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION [2021-10-28 08:52:56,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION [2021-10-28 08:52:56,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION [2021-10-28 08:52:56,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION [2021-10-28 08:52:56,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION [2021-10-28 08:52:56,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION [2021-10-28 08:52:56,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION [2021-10-28 08:52:56,058 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION [2021-10-28 08:52:56,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-10-28 08:52:56,062 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:56,067 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:52:56,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:52:56 BoogieIcfgContainer [2021-10-28 08:52:56,137 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:52:56,137 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:52:56,138 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:52:56,138 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:52:56,138 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:39:50" (3/4) ... [2021-10-28 08:52:56,141 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 08:52:56,225 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:52:56,225 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:52:56,226 INFO L168 Benchmark]: Toolchain (without parser) took 787103.93 ms. Allocated memory was 111.1 MB in the beginning and 234.9 MB in the end (delta: 123.7 MB). Free memory was 79.8 MB in the beginning and 135.2 MB in the end (delta: -55.5 MB). Peak memory consumption was 67.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:56,227 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 79.7 MB. Free memory is still 37.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:52:56,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 632.82 ms. Allocated memory is still 111.1 MB. Free memory was 79.5 MB in the beginning and 80.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:56,228 INFO L168 Benchmark]: Boogie Preprocessor took 123.63 ms. Allocated memory is still 111.1 MB. Free memory was 80.6 MB in the beginning and 77.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:56,228 INFO L168 Benchmark]: RCFGBuilder took 927.16 ms. Allocated memory is still 111.1 MB. Free memory was 77.7 MB in the beginning and 83.9 MB in the end (delta: -6.2 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:56,229 INFO L168 Benchmark]: TraceAbstraction took 785313.50 ms. Allocated memory was 111.1 MB in the beginning and 234.9 MB in the end (delta: 123.7 MB). Free memory was 83.5 MB in the beginning and 138.4 MB in the end (delta: -54.9 MB). Peak memory consumption was 173.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:56,230 INFO L168 Benchmark]: Witness Printer took 88.34 ms. Allocated memory is still 234.9 MB. Free memory was 138.4 MB in the beginning and 135.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:56,234 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 79.7 MB. Free memory is still 37.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 632.82 ms. Allocated memory is still 111.1 MB. Free memory was 79.5 MB in the beginning and 80.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 123.63 ms. Allocated memory is still 111.1 MB. Free memory was 80.6 MB in the beginning and 77.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 927.16 ms. Allocated memory is still 111.1 MB. Free memory was 77.7 MB in the beginning and 83.9 MB in the end (delta: -6.2 MB). Peak memory consumption was 29.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 785313.50 ms. Allocated memory was 111.1 MB in the beginning and 234.9 MB in the end (delta: 123.7 MB). Free memory was 83.5 MB in the beginning and 138.4 MB in the end (delta: -54.9 MB). Peak memory consumption was 173.7 MB. Max. memory is 16.1 GB. * Witness Printer took 88.34 ms. Allocated memory is still 234.9 MB. Free memory was 138.4 MB in the beginning and 135.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 552]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L539] struct item *list = ((void *)0); VAL [list={3:0}] [L541] CALL append(&list) VAL [plist={3:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={0:0}, item={-4:0}, plist={3:0}, plist={3:0}] [L531] item->next = *plist VAL [\read(**plist)={0:0}, item={-4:0}, plist={3:0}, plist={3:0}] [L532] EXPR item->next VAL [item={-4:0}, item->next={0:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-4:0}, item->next={0:0}, malloc(sizeof *item)={-3:0}, plist={3:0}, plist={3:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-4:0}, item->next={0:0}, malloc(sizeof *item)={-3:0}, plist={3:0}, plist={3:0}] [L535] *plist = item VAL [item={-4:0}, plist={3:0}, plist={3:0}] [L541] RET append(&list) VAL [list={3:0}] [L542] COND TRUE __VERIFIER_nondet_int() [L541] CALL append(&list) VAL [plist={3:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={-4:0}, item={-2:0}, plist={3:0}, plist={3:0}] [L531] item->next = *plist VAL [\read(**plist)={-4:0}, item={-2:0}, plist={3:0}, plist={3:0}] [L532] EXPR item->next VAL [item={-2:0}, item->next={-4:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [item={-2:0}, item->next={-4:0}, plist={3:0}, plist={3:0}] [L533] EXPR item->next VAL [item={-2:0}, item->next={-4:0}, item->next={-4:0}, plist={3:0}, plist={3:0}] [L533] EXPR item->next->data VAL [item={-2:0}, item->next={-4:0}, item->next={-4:0}, item->next->data={-3:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-2:0}, item->next={-4:0}, item->next={-4:0}, item->next->data={-3:0}, plist={3:0}, plist={3:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-3:0}, item={-2:0}, item->next={-4:0}, item->next={-4:0}, item->next->data={-3:0}, plist={3:0}, plist={3:0}] [L535] *plist = item VAL [item={-2:0}, plist={3:0}, plist={3:0}] [L541] RET append(&list) VAL [list={3:0}] [L542] COND FALSE !(__VERIFIER_nondet_int()) [L543] \read(*list) VAL [\read(*list)={-2:0}, list={3:0}] [L543] COND TRUE \read(*list) [L544] EXPR \read(*list) VAL [\read(*list)={-2:0}, list={3:0}] [L544] EXPR list->next VAL [\read(*list)={-2:0}, list={3:0}, list->next={-4:0}] [L544] struct item *next = list->next; [L545] EXPR \read(*list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L545] EXPR list->data VAL [\read(*list)={-2:0}, list={3:0}, list->data={-3:0}, next={-4:0}] [L545] free(list->data) VAL [\read(*list)={-2:0}, list={3:0}, list->data={-3:0}, next={-4:0}] [L545] free(list->data) VAL [\read(*list)={-2:0}, list={3:0}, list->data={-3:0}, next={-4:0}] [L545] free(list->data) [L546] EXPR \read(*list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L546] free(list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L546] free(list) VAL [\read(*list)={-2:0}, list={3:0}, next={-4:0}] [L546] free(list) [L547] list = next VAL [list={3:0}, next={-4:0}] [L549] \read(*list) VAL [\read(*list)={-4:0}, list={3:0}, next={-4:0}] [L549] COND TRUE \read(*list) [L550] EXPR \read(*list) VAL [\read(*list)={-4:0}, list={3:0}, next={-4:0}] [L550] EXPR list->next VAL [\read(*list)={-4:0}, list={3:0}, list->next={0:0}, next={-4:0}] [L550] struct item *next = list->next; [L551] COND TRUE !next VAL [list={3:0}, next={-4:0}, next={0:0}] [L552] EXPR \read(*list) VAL [\read(*list)={-4:0}, list={3:0}, next={0:0}, next={-4:0}] [L552] EXPR list->data VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={-4:0}, next={0:0}] [L552] free(list->data) VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={0:0}, next={-4:0}] [L552] free(list->data) VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={-4:0}, next={0:0}] [L552] free(list->data) VAL [\read(*list)={-4:0}, list={3:0}, list->data={-3:0}, next={0:0}, next={-4:0}] - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 132 locations, 55 error locations. Started 1 CEGAR loops. OverallTime: 785.1s, OverallIterations: 44, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 576.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2318 SDtfs, 5922 SDslu, 15977 SDs, 0 SdLazy, 28021 SolverSat, 1257 SolverUnsat, 166 SolverUnknown, 0 SolverNotchecked, 321.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1967 GetRequests, 700 SyntacticMatches, 13 SemanticMatches, 1254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15193 ImplicationChecksByTransitivity, 413.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=25, InterpolantAutomatonStates: 734, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 43 MinimizatonAttempts, 549 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 192.6s InterpolantComputationTime, 2466 NumberOfCodeBlocks, 2466 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 2344 ConstructedInterpolants, 129 QuantifiedInterpolants, 55343 SizeOfPredicates, 373 NumberOfNonLiveVariables, 5196 ConjunctsInSsa, 1068 ConjunctsInUnsatCore, 59 InterpolantComputations, 27 PerfectInterpolantSequences, 198/462 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 08:52:56,493 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-28 08:52:56,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff79aa02-307c-4b0c-b559-4f868d7d5c90/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...