./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF --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 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:16:23,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:16:23,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:16:23,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:16:23,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:16:23,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:16:23,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:16:23,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:16:23,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:16:23,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:16:23,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:16:23,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:16:23,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:16:23,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:16:23,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:16:23,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:16:23,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:16:23,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:16:23,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:16:23,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:16:23,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:16:23,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:16:23,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:16:23,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:16:23,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:16:23,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:16:23,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:16:23,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:16:23,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:16:23,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:16:23,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:16:23,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:16:23,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:16:23,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:16:23,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:16:23,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:16:23,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:16:23,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:16:23,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:16:23,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:16:23,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:16:23,459 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 06:16:23,488 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:16:23,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:16:23,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:16:23,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:16:23,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:16:23,489 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:16:23,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:16:23,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:16:23,490 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:16:23,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:16:23,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:16:23,491 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:16:23,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:16:23,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:16:23,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:16:23,491 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:16:23,492 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:16:23,492 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:16:23,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:16:23,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:16:23,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:16:23,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:16:23,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:16:23,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:16:23,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:16:23,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:16:23,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:16:23,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:16:23,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:16:23,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:16:23,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:16:23,494 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_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2021-11-20 06:16:23,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:16:23,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:16:23,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:16:23,772 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:16:23,773 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:16:23,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2021-11-20 06:16:23,841 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/data/ac446bf39/3a039676b9ad4a2ab102510a962eabd8/FLAG7e60288c9 [2021-11-20 06:16:24,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:16:24,290 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2021-11-20 06:16:24,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/data/ac446bf39/3a039676b9ad4a2ab102510a962eabd8/FLAG7e60288c9 [2021-11-20 06:16:24,679 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/data/ac446bf39/3a039676b9ad4a2ab102510a962eabd8 [2021-11-20 06:16:24,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:16:24,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:16:24,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:16:24,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:16:24,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:16:24,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:16:24" (1/1) ... [2021-11-20 06:16:24,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e60fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:24, skipping insertion in model container [2021-11-20 06:16:24,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:16:24" (1/1) ... [2021-11-20 06:16:24,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:16:24,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:16:24,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:16:24,952 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:16:24,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:16:25,011 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:16:25,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25 WrapperNode [2021-11-20 06:16:25,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:16:25,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:16:25,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:16:25,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:16:25,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25" (1/1) ... [2021-11-20 06:16:25,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25" (1/1) ... [2021-11-20 06:16:25,068 INFO L137 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2021-11-20 06:16:25,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:16:25,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:16:25,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:16:25,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:16:25,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25" (1/1) ... [2021-11-20 06:16:25,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25" (1/1) ... [2021-11-20 06:16:25,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25" (1/1) ... [2021-11-20 06:16:25,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25" (1/1) ... [2021-11-20 06:16:25,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25" (1/1) ... [2021-11-20 06:16:25,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25" (1/1) ... [2021-11-20 06:16:25,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25" (1/1) ... [2021-11-20 06:16:25,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:16:25,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:16:25,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:16:25,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:16:25,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25" (1/1) ... [2021-11-20 06:16:25,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:16:25,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:25,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:16:25,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:16:25,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:16:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:16:25,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:16:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:16:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:16:25,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:16:25,274 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:16:25,276 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:16:25,452 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:16:25,458 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:16:25,459 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:16:25,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:16:25 BoogieIcfgContainer [2021-11-20 06:16:25,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:16:25,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:16:25,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:16:25,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:16:25,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:16:24" (1/3) ... [2021-11-20 06:16:25,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c610a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:16:25, skipping insertion in model container [2021-11-20 06:16:25,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:16:25" (2/3) ... [2021-11-20 06:16:25,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c610a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:16:25, skipping insertion in model container [2021-11-20 06:16:25,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:16:25" (3/3) ... [2021-11-20 06:16:25,470 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2021-11-20 06:16:25,475 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:16:25,475 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-20 06:16:25,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:16:25,529 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:16:25,529 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-20 06:16:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:25,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 06:16:25,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:25,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 06:16:25,553 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:25,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:25,558 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2021-11-20 06:16:25,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:25,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197366592] [2021-11-20 06:16:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:25,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:25,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:25,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197366592] [2021-11-20 06:16:25,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197366592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:25,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:25,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:16:25,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947909494] [2021-11-20 06:16:25,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:25,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:16:25,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:25,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:16:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:16:25,872 INFO L87 Difference]: Start difference. First operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:26,015 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-11-20 06:16:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:16:26,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 06:16:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:26,046 INFO L225 Difference]: With dead ends: 69 [2021-11-20 06:16:26,046 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 06:16:26,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:16:26,053 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:26,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 84 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:16:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 06:16:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2021-11-20 06:16:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-20 06:16:26,091 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 5 [2021-11-20 06:16:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:26,092 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-20 06:16:26,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-20 06:16:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 06:16:26,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:26,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:26,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:16:26,094 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:26,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:26,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811544, now seen corresponding path program 1 times [2021-11-20 06:16:26,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:26,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727651747] [2021-11-20 06:16:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:26,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:26,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:26,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727651747] [2021-11-20 06:16:26,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727651747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:26,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:26,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:16:26,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623425099] [2021-11-20 06:16:26,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:26,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:16:26,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:26,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:16:26,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:16:26,206 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:26,328 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-11-20 06:16:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:16:26,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 06:16:26,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:26,336 INFO L225 Difference]: With dead ends: 70 [2021-11-20 06:16:26,336 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 06:16:26,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:16:26,347 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:26,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 116 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:16:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 06:16:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2021-11-20 06:16:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-20 06:16:26,361 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 7 [2021-11-20 06:16:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:26,362 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-20 06:16:26,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-20 06:16:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:16:26,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:26,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:26,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:16:26,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash -489510905, now seen corresponding path program 1 times [2021-11-20 06:16:26,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:26,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417348455] [2021-11-20 06:16:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:26,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:26,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417348455] [2021-11-20 06:16:26,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417348455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:26,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:26,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:16:26,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256334189] [2021-11-20 06:16:26,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:26,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:16:26,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:26,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:16:26,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:16:26,489 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:26,546 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-11-20 06:16:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:16:26,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:16:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:26,549 INFO L225 Difference]: With dead ends: 75 [2021-11-20 06:16:26,549 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 06:16:26,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:16:26,551 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 61 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:26,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 152 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:16:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 06:16:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2021-11-20 06:16:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-11-20 06:16:26,559 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 11 [2021-11-20 06:16:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:26,559 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-11-20 06:16:26,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-11-20 06:16:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:16:26,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:26,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:26,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:16:26,561 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:26,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:26,562 INFO L85 PathProgramCache]: Analyzing trace with hash -489508983, now seen corresponding path program 1 times [2021-11-20 06:16:26,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:26,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782975786] [2021-11-20 06:16:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:26,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:26,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:26,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782975786] [2021-11-20 06:16:26,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782975786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:26,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:26,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:16:26,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477759678] [2021-11-20 06:16:26,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:26,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:16:26,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:26,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:16:26,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:16:26,659 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:26,693 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-11-20 06:16:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:16:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:16:26,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:26,694 INFO L225 Difference]: With dead ends: 43 [2021-11-20 06:16:26,694 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 06:16:26,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:16:26,696 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:26,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:16:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 06:16:26,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-20 06:16:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-20 06:16:26,702 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2021-11-20 06:16:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:26,703 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-20 06:16:26,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-20 06:16:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:16:26,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:26,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:26,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:16:26,704 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:26,705 INFO L85 PathProgramCache]: Analyzing trace with hash -489508982, now seen corresponding path program 1 times [2021-11-20 06:16:26,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:26,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449488116] [2021-11-20 06:16:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:26,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:26,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:26,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449488116] [2021-11-20 06:16:26,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449488116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:26,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:26,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:16:26,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575133306] [2021-11-20 06:16:26,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:26,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:16:26,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:16:26,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:16:26,825 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:26,902 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-11-20 06:16:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:16:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:16:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:26,904 INFO L225 Difference]: With dead ends: 50 [2021-11-20 06:16:26,904 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 06:16:26,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:16:26,908 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:26,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:16:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 06:16:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-11-20 06:16:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-20 06:16:26,926 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 11 [2021-11-20 06:16:26,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:26,927 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-20 06:16:26,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-20 06:16:26,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:16:26,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:26,932 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:26,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:16:26,933 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:26,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839934, now seen corresponding path program 1 times [2021-11-20 06:16:26,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:26,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412808105] [2021-11-20 06:16:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:26,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:27,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:27,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412808105] [2021-11-20 06:16:27,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412808105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:27,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:27,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:16:27,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381459788] [2021-11-20 06:16:27,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:27,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:16:27,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:27,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:16:27,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:16:27,024 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:27,055 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-11-20 06:16:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:16:27,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 06:16:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:27,057 INFO L225 Difference]: With dead ends: 47 [2021-11-20 06:16:27,057 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 06:16:27,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:16:27,058 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:27,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:16:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 06:16:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-20 06:16:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-11-20 06:16:27,063 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2021-11-20 06:16:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:27,063 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-11-20 06:16:27,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-11-20 06:16:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:16:27,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:27,065 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:27,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:16:27,065 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:27,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839933, now seen corresponding path program 1 times [2021-11-20 06:16:27,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:27,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176602898] [2021-11-20 06:16:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:27,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:27,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:27,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176602898] [2021-11-20 06:16:27,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176602898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:27,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843716769] [2021-11-20 06:16:27,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:27,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:27,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:27,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:27,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:16:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:27,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:16:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:27,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:16:27,452 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-20 06:16:27,453 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 14 treesize of output 20 [2021-11-20 06:16:27,668 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 23 treesize of output 22 [2021-11-20 06:16:27,838 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:16:27,839 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 [2021-11-20 06:16:28,073 INFO L354 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2021-11-20 06:16:28,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 41 [2021-11-20 06:16:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:28,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:30,461 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~n#1_3| Int)) (or (and (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_12| Int)) (<= (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4) (select (store |c_#length| |v_ULTIMATE.start_foo_~#a~0#1.base_12| (* |v_ULTIMATE.start_foo_~n#1_3| 4)) |c_ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|)) (< |v_ULTIMATE.start_foo_~n#1_3| |c_ULTIMATE.start_main_~i~2#1|))) is different from false [2021-11-20 06:16:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:16:33,227 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_14| Int) (|v_ULTIMATE.start_foo_~n#1_3| Int)) (or (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_14|) (< |v_ULTIMATE.start_foo_~n#1_3| (+ |c_ULTIMATE.start_main_~i~2#1| 1)) (and (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_12| Int) (|v_ULTIMATE.start_foo_~n#1_4| Int)) (<= (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4) (select (store (store |c_#length| |v_ULTIMATE.start_foo_~#a~0#1.base_14| (* |v_ULTIMATE.start_foo_~n#1_4| 4)) |v_ULTIMATE.start_foo_~#a~0#1.base_12| (* |v_ULTIMATE.start_foo_~n#1_3| 4)) |c_ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |c_ULTIMATE.start_main_~#b~0#1.offset|)))) is different from false [2021-11-20 06:16:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-20 06:16:33,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843716769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:33,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:16:33,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2021-11-20 06:16:33,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699317134] [2021-11-20 06:16:33,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:33,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:16:33,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:33,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:16:33,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=189, Unknown=2, NotChecked=58, Total=306 [2021-11-20 06:16:33,262 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:33,645 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-11-20 06:16:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:16:33,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 06:16:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:33,647 INFO L225 Difference]: With dead ends: 71 [2021-11-20 06:16:33,647 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 06:16:33,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=107, Invalid=361, Unknown=2, NotChecked=82, Total=552 [2021-11-20 06:16:33,649 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:33,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 169 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 140 Unchecked, 0.1s Time] [2021-11-20 06:16:33,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 06:16:33,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2021-11-20 06:16:33,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:33,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-11-20 06:16:33,655 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 16 [2021-11-20 06:16:33,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:33,655 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-11-20 06:16:33,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:33,656 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-11-20 06:16:33,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:16:33,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:33,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:33,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:16:33,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:16:33,877 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:33,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:33,877 INFO L85 PathProgramCache]: Analyzing trace with hash -411440119, now seen corresponding path program 1 times [2021-11-20 06:16:33,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:33,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475813489] [2021-11-20 06:16:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:33,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:33,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475813489] [2021-11-20 06:16:33,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475813489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:33,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002026119] [2021-11-20 06:16:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:33,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:33,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:33,939 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:33,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:16:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:33,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:16:33,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:34,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:34,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002026119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:34,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:16:34,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 06:16:34,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991763394] [2021-11-20 06:16:34,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:34,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:16:34,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:34,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:16:34,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:16:34,113 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:34,152 INFO L93 Difference]: Finished difference Result 163 states and 198 transitions. [2021-11-20 06:16:34,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:16:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:16:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:34,154 INFO L225 Difference]: With dead ends: 163 [2021-11-20 06:16:34,155 INFO L226 Difference]: Without dead ends: 163 [2021-11-20 06:16:34,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:16:34,156 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 163 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:34,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 123 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:16:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-20 06:16:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2021-11-20 06:16:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.3846153846153846) internal successors, (198), 150 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2021-11-20 06:16:34,188 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 17 [2021-11-20 06:16:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:34,189 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2021-11-20 06:16:34,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2021-11-20 06:16:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:16:34,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:34,190 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:34,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:34,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 06:16:34,405 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:34,405 INFO L85 PathProgramCache]: Analyzing trace with hash -411430410, now seen corresponding path program 1 times [2021-11-20 06:16:34,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:34,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975013576] [2021-11-20 06:16:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:34,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:16:34,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:34,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975013576] [2021-11-20 06:16:34,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975013576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:34,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:34,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:16:34,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155284128] [2021-11-20 06:16:34,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:34,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:16:34,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:34,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:16:34,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:34,435 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:34,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:34,452 INFO L93 Difference]: Finished difference Result 150 states and 195 transitions. [2021-11-20 06:16:34,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:16:34,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:16:34,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:34,454 INFO L225 Difference]: With dead ends: 150 [2021-11-20 06:16:34,454 INFO L226 Difference]: Without dead ends: 150 [2021-11-20 06:16:34,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:16:34,455 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:34,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:16:34,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-20 06:16:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-20 06:16:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 143 states have (on average 1.3636363636363635) internal successors, (195), 149 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 195 transitions. [2021-11-20 06:16:34,463 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 195 transitions. Word has length 17 [2021-11-20 06:16:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:34,463 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 195 transitions. [2021-11-20 06:16:34,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 195 transitions. [2021-11-20 06:16:34,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:16:34,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:34,465 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:34,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:16:34,465 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:34,466 INFO L85 PathProgramCache]: Analyzing trace with hash -411430409, now seen corresponding path program 1 times [2021-11-20 06:16:34,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:34,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520447558] [2021-11-20 06:16:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:34,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:34,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:34,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520447558] [2021-11-20 06:16:34,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520447558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:34,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981299281] [2021-11-20 06:16:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:34,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:34,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:34,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:34,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:16:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:34,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:16:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:34,664 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 12 treesize of output 11 [2021-11-20 06:16:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:34,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:34,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981299281] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:34,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:16:34,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 06:16:34,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593884200] [2021-11-20 06:16:34,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:34,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:16:34,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:16:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:16:34,782 INFO L87 Difference]: Start difference. First operand 150 states and 195 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:34,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:34,898 INFO L93 Difference]: Finished difference Result 190 states and 246 transitions. [2021-11-20 06:16:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:16:34,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:16:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:34,900 INFO L225 Difference]: With dead ends: 190 [2021-11-20 06:16:34,900 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 06:16:34,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:16:34,901 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 108 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:34,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 85 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:16:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 06:16:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 157. [2021-11-20 06:16:34,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.3733333333333333) internal successors, (206), 156 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 206 transitions. [2021-11-20 06:16:34,908 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 206 transitions. Word has length 17 [2021-11-20 06:16:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:34,909 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 206 transitions. [2021-11-20 06:16:34,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 206 transitions. [2021-11-20 06:16:34,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:16:34,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:34,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:34,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:35,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:35,133 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:35,133 INFO L85 PathProgramCache]: Analyzing trace with hash 130511665, now seen corresponding path program 1 times [2021-11-20 06:16:35,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:35,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980671069] [2021-11-20 06:16:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:35,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:16:35,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:35,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980671069] [2021-11-20 06:16:35,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980671069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:16:35,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:16:35,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:16:35,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358004972] [2021-11-20 06:16:35,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:16:35,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:16:35,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:35,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:16:35,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:16:35,174 INFO L87 Difference]: Start difference. First operand 157 states and 206 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:35,203 INFO L93 Difference]: Finished difference Result 156 states and 200 transitions. [2021-11-20 06:16:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:16:35,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 06:16:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:35,207 INFO L225 Difference]: With dead ends: 156 [2021-11-20 06:16:35,207 INFO L226 Difference]: Without dead ends: 156 [2021-11-20 06:16:35,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:16:35,208 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:35,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:16:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-20 06:16:35,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-11-20 06:16:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.3333333333333333) internal successors, (200), 155 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 200 transitions. [2021-11-20 06:16:35,215 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 200 transitions. Word has length 18 [2021-11-20 06:16:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:35,216 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 200 transitions. [2021-11-20 06:16:35,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 200 transitions. [2021-11-20 06:16:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:16:35,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:35,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:35,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:16:35,219 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:35,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:35,219 INFO L85 PathProgramCache]: Analyzing trace with hash 130511666, now seen corresponding path program 1 times [2021-11-20 06:16:35,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:35,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049742403] [2021-11-20 06:16:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:35,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:35,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:35,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049742403] [2021-11-20 06:16:35,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049742403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:35,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852091710] [2021-11-20 06:16:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:35,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:35,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:35,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:35,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:16:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:35,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:16:35,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:35,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:35,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852091710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:35,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:16:35,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-20 06:16:35,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255285687] [2021-11-20 06:16:35,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:35,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:16:35,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:16:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:16:35,507 INFO L87 Difference]: Start difference. First operand 156 states and 200 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:35,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:35,588 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2021-11-20 06:16:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:16:35,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 06:16:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:35,590 INFO L225 Difference]: With dead ends: 108 [2021-11-20 06:16:35,590 INFO L226 Difference]: Without dead ends: 108 [2021-11-20 06:16:35,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:16:35,591 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:35,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 96 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:16:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-20 06:16:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-11-20 06:16:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.305263157894737) internal successors, (124), 100 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2021-11-20 06:16:35,597 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 18 [2021-11-20 06:16:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:35,597 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2021-11-20 06:16:35,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2021-11-20 06:16:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:16:35,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:35,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:35,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:35,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:35,817 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:35,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:35,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1752050598, now seen corresponding path program 1 times [2021-11-20 06:16:35,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:35,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704896458] [2021-11-20 06:16:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:35,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:35,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:35,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704896458] [2021-11-20 06:16:35,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704896458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:35,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025208629] [2021-11-20 06:16:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:35,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:35,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:35,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:35,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:16:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:35,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:16:35,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:36,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:36,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025208629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:36,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:16:36,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-20 06:16:36,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623056954] [2021-11-20 06:16:36,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:36,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:16:36,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:36,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:16:36,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:16:36,093 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:36,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:36,206 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2021-11-20 06:16:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:16:36,207 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 06:16:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:36,208 INFO L225 Difference]: With dead ends: 101 [2021-11-20 06:16:36,208 INFO L226 Difference]: Without dead ends: 101 [2021-11-20 06:16:36,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:16:36,209 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 194 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:36,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 94 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:16:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-20 06:16:36,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-11-20 06:16:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.2795698924731183) internal successors, (119), 98 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 119 transitions. [2021-11-20 06:16:36,213 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 119 transitions. Word has length 21 [2021-11-20 06:16:36,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:36,214 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 119 transitions. [2021-11-20 06:16:36,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 119 transitions. [2021-11-20 06:16:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 06:16:36,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:36,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:36,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 06:16:36,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:16:36,429 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:36,429 INFO L85 PathProgramCache]: Analyzing trace with hash -93493367, now seen corresponding path program 1 times [2021-11-20 06:16:36,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:36,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777974182] [2021-11-20 06:16:36,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:36,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:16:36,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777974182] [2021-11-20 06:16:36,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777974182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:36,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255886713] [2021-11-20 06:16:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:36,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:36,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:36,505 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:36,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:16:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:36,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:16:36,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:16:36,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:36,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-20 06:16:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:16:36,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255886713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:36,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:16:36,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-20 06:16:36,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297927118] [2021-11-20 06:16:36,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:36,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:16:36,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:36,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:16:36,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:16:36,827 INFO L87 Difference]: Start difference. First operand 99 states and 119 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:36,993 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2021-11-20 06:16:36,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:16:36,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-20 06:16:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:36,994 INFO L225 Difference]: With dead ends: 137 [2021-11-20 06:16:36,994 INFO L226 Difference]: Without dead ends: 137 [2021-11-20 06:16:36,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:16:36,995 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 114 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:36,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 102 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:16:36,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-20 06:16:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 102. [2021-11-20 06:16:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 101 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2021-11-20 06:16:36,999 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 23 [2021-11-20 06:16:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:37,000 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2021-11-20 06:16:37,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:37,000 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2021-11-20 06:16:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:16:37,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:37,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:37,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:37,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:16:37,202 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:37,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1409452358, now seen corresponding path program 1 times [2021-11-20 06:16:37,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834814702] [2021-11-20 06:16:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:37,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:16:37,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:37,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834814702] [2021-11-20 06:16:37,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834814702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:37,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201516283] [2021-11-20 06:16:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:37,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:37,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:37,252 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:37,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:16:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:37,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:16:37,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:16:37,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:16:37,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201516283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:37,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:16:37,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2021-11-20 06:16:37,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566205526] [2021-11-20 06:16:37,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:37,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:16:37,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:37,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:16:37,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:16:37,514 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:37,609 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2021-11-20 06:16:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:16:37,610 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-20 06:16:37,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:37,611 INFO L225 Difference]: With dead ends: 99 [2021-11-20 06:16:37,611 INFO L226 Difference]: Without dead ends: 99 [2021-11-20 06:16:37,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:16:37,612 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 78 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:37,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 83 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:16:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-20 06:16:37,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2021-11-20 06:16:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 87 states have (on average 1.264367816091954) internal successors, (110), 92 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2021-11-20 06:16:37,616 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 27 [2021-11-20 06:16:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:37,617 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2021-11-20 06:16:37,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2021-11-20 06:16:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:16:37,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:37,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:37,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:37,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:16:37,833 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:37,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1360755252, now seen corresponding path program 1 times [2021-11-20 06:16:37,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:37,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084696975] [2021-11-20 06:16:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:37,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:16:37,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:37,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084696975] [2021-11-20 06:16:37,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084696975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:37,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512341560] [2021-11-20 06:16:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:37,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:37,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:37,892 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:37,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:16:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:37,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:16:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:16:38,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:16:38,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512341560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:16:38,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:16:38,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-20 06:16:38,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13420468] [2021-11-20 06:16:38,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:38,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:16:38,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:38,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:16:38,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:16:38,161 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:16:38,310 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2021-11-20 06:16:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:16:38,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-20 06:16:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:16:38,311 INFO L225 Difference]: With dead ends: 95 [2021-11-20 06:16:38,311 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 06:16:38,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:16:38,312 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 157 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:16:38,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 156 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:16:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 06:16:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-11-20 06:16:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.244186046511628) internal successors, (107), 91 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2021-11-20 06:16:38,315 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 27 [2021-11-20 06:16:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:16:38,316 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2021-11-20 06:16:38,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2021-11-20 06:16:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 06:16:38,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:16:38,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:38,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:16:38,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:16:38,517 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:16:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:38,518 INFO L85 PathProgramCache]: Analyzing trace with hash -144329733, now seen corresponding path program 1 times [2021-11-20 06:16:38,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:38,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040711641] [2021-11-20 06:16:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:38,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:16:38,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:38,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040711641] [2021-11-20 06:16:38,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040711641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:38,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270603798] [2021-11-20 06:16:38,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:38,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:38,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:38,717 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:38,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:16:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 06:16:38,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:38,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:16:39,019 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 06:16:39,020 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 23 treesize of output 18 [2021-11-20 06:16:39,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:16:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:39,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:00,055 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 14 treesize of output 12 [2021-11-20 06:17:00,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-20 06:17:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:17:00,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270603798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:00,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:00,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 32 [2021-11-20 06:17:00,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644463753] [2021-11-20 06:17:00,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:00,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:17:00,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:00,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:17:00,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=890, Unknown=5, NotChecked=0, Total=992 [2021-11-20 06:17:00,205 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:01,037 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2021-11-20 06:17:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:17:01,038 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-20 06:17:01,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:01,038 INFO L225 Difference]: With dead ends: 95 [2021-11-20 06:17:01,038 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 06:17:01,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=355, Invalid=2292, Unknown=5, NotChecked=0, Total=2652 [2021-11-20 06:17:01,040 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 90 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:01,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 302 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 422 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2021-11-20 06:17:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 06:17:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-11-20 06:17:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 91 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2021-11-20 06:17:01,044 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 31 [2021-11-20 06:17:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:01,045 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2021-11-20 06:17:01,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2021-11-20 06:17:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 06:17:01,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:01,051 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:17:01,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:01,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:17:01,265 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash -815650256, now seen corresponding path program 1 times [2021-11-20 06:17:01,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:01,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501995180] [2021-11-20 06:17:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:01,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:17:01,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:01,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501995180] [2021-11-20 06:17:01,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501995180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:01,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722166827] [2021-11-20 06:17:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:01,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:01,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:01,428 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:01,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:17:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 06:17:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:01,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:17:01,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:17:01,558 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 06:17:01,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-20 06:17:01,568 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:17:01,569 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 23 treesize of output 23 [2021-11-20 06:17:01,925 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:17:01,925 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 11 treesize of output 11 [2021-11-20 06:17:01,942 INFO L354 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2021-11-20 06:17:01,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 34 [2021-11-20 06:17:02,437 INFO L354 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2021-11-20 06:17:02,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 41 [2021-11-20 06:17:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:17:02,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:05,805 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:17:05,806 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 39 treesize of output 38 [2021-11-20 06:17:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:17:11,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722166827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:11,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:11,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 22 [2021-11-20 06:17:11,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219257184] [2021-11-20 06:17:11,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:11,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:17:11,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:11,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:17:11,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=391, Unknown=3, NotChecked=0, Total=506 [2021-11-20 06:17:11,066 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:11,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:11,543 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2021-11-20 06:17:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:17:11,554 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 06:17:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:11,555 INFO L225 Difference]: With dead ends: 167 [2021-11-20 06:17:11,555 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 06:17:11,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=249, Invalid=678, Unknown=3, NotChecked=0, Total=930 [2021-11-20 06:17:11,557 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 270 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:11,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 203 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 105 Invalid, 0 Unknown, 169 Unchecked, 0.1s Time] [2021-11-20 06:17:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 06:17:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2021-11-20 06:17:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.2295081967213115) internal successors, (150), 127 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2021-11-20 06:17:11,562 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 36 [2021-11-20 06:17:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:11,563 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2021-11-20 06:17:11,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 23 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2021-11-20 06:17:11,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:17:11,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:11,564 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:17:11,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:11,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:17:11,781 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:11,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1410284307, now seen corresponding path program 1 times [2021-11-20 06:17:11,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:11,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491533878] [2021-11-20 06:17:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:11,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:17:11,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:11,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491533878] [2021-11-20 06:17:11,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491533878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:11,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890129653] [2021-11-20 06:17:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:11,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:11,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:11,893 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:11,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:17:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:17:11,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:12,046 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 12 treesize of output 11 [2021-11-20 06:17:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:17:12,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:17:12,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890129653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:12,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:12,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-20 06:17:12,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183314105] [2021-11-20 06:17:12,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:12,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:17:12,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:12,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:17:12,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:17:12,351 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 12 states, 11 states have (on average 6.545454545454546) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:12,593 INFO L93 Difference]: Finished difference Result 173 states and 204 transitions. [2021-11-20 06:17:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:17:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.545454545454546) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-20 06:17:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:12,594 INFO L225 Difference]: With dead ends: 173 [2021-11-20 06:17:12,595 INFO L226 Difference]: Without dead ends: 173 [2021-11-20 06:17:12,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:17:12,595 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 86 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:12,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 194 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:17:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-20 06:17:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 135. [2021-11-20 06:17:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.2325581395348837) internal successors, (159), 134 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2021-11-20 06:17:12,600 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 42 [2021-11-20 06:17:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:12,600 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2021-11-20 06:17:12,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.545454545454546) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2021-11-20 06:17:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 06:17:12,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:12,601 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:17:12,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:12,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:12,817 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash 183114832, now seen corresponding path program 2 times [2021-11-20 06:17:12,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:12,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994888733] [2021-11-20 06:17:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:12,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:17:12,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:12,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994888733] [2021-11-20 06:17:12,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994888733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:12,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236326966] [2021-11-20 06:17:12,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:17:12,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:12,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:12,921 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:12,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:17:12,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:17:12,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:12,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:17:12,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:17:13,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:17:13,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236326966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:13,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:13,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-20 06:17:13,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208475201] [2021-11-20 06:17:13,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:13,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:17:13,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:13,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:17:13,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:17:13,277 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:13,517 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2021-11-20 06:17:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:17:13,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 06:17:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:13,519 INFO L225 Difference]: With dead ends: 157 [2021-11-20 06:17:13,519 INFO L226 Difference]: Without dead ends: 157 [2021-11-20 06:17:13,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:17:13,520 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 260 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:13,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 171 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:17:13,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-20 06:17:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 133. [2021-11-20 06:17:13,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 127 states have (on average 1.2125984251968505) internal successors, (154), 132 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:13,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2021-11-20 06:17:13,526 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 46 [2021-11-20 06:17:13,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:13,526 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2021-11-20 06:17:13,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2021-11-20 06:17:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 06:17:13,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:13,527 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-20 06:17:13,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:13,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:13,753 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:13,753 INFO L85 PathProgramCache]: Analyzing trace with hash 457132991, now seen corresponding path program 2 times [2021-11-20 06:17:13,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:13,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62596520] [2021-11-20 06:17:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:13,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:17:13,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:13,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62596520] [2021-11-20 06:17:13,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62596520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:13,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909596764] [2021-11-20 06:17:13,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:17:13,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:13,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:13,842 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:13,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:17:13,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:17:13,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:17:13,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:17:14,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:17:14,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909596764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:14,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:14,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-20 06:17:14,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414854352] [2021-11-20 06:17:14,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:14,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:17:14,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:14,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:17:14,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:17:14,182 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:14,351 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2021-11-20 06:17:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:17:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-20 06:17:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:14,353 INFO L225 Difference]: With dead ends: 138 [2021-11-20 06:17:14,353 INFO L226 Difference]: Without dead ends: 138 [2021-11-20 06:17:14,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:17:14,354 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 63 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:14,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 229 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:17:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-20 06:17:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2021-11-20 06:17:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 127 states have (on average 1.188976377952756) internal successors, (151), 132 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2021-11-20 06:17:14,359 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 47 [2021-11-20 06:17:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:14,359 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2021-11-20 06:17:14,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2021-11-20 06:17:14,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 06:17:14,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:14,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-20 06:17:14,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:14,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 06:17:14,560 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash -269976254, now seen corresponding path program 3 times [2021-11-20 06:17:14,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:14,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841989788] [2021-11-20 06:17:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:14,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:17:14,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:14,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841989788] [2021-11-20 06:17:14,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841989788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:14,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186662396] [2021-11-20 06:17:14,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:17:14,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:14,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:14,722 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:14,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:17:14,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:17:14,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:14,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:17:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:17:15,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:15,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-20 06:17:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 06:17:15,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186662396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:15,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:15,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2021-11-20 06:17:15,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468391320] [2021-11-20 06:17:15,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:15,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:17:15,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:15,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:17:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:17:15,649 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:16,664 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2021-11-20 06:17:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:17:16,666 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-20 06:17:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:16,668 INFO L225 Difference]: With dead ends: 188 [2021-11-20 06:17:16,668 INFO L226 Difference]: Without dead ends: 188 [2021-11-20 06:17:16,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 06:17:16,672 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 254 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:16,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 247 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:17:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-20 06:17:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 129. [2021-11-20 06:17:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 128 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 145 transitions. [2021-11-20 06:17:16,678 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 145 transitions. Word has length 52 [2021-11-20 06:17:16,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:16,678 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 145 transitions. [2021-11-20 06:17:16,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:16,679 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 145 transitions. [2021-11-20 06:17:16,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:17:16,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:16,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-20 06:17:16,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:16,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 06:17:16,905 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:16,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1642790799, now seen corresponding path program 2 times [2021-11-20 06:17:16,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:16,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446816890] [2021-11-20 06:17:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:16,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:17:17,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:17,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446816890] [2021-11-20 06:17:17,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446816890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:17,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735283782] [2021-11-20 06:17:17,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:17:17,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:17,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:17,025 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:17,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:17:17,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:17:17,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:17,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:17:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:17:17,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:17:17,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735283782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:17,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:17,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-20 06:17:17,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954828864] [2021-11-20 06:17:17,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:17,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:17:17,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:17,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:17:17,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:17:17,454 INFO L87 Difference]: Start difference. First operand 129 states and 145 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:17,667 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2021-11-20 06:17:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:17:17,668 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 06:17:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:17,669 INFO L225 Difference]: With dead ends: 150 [2021-11-20 06:17:17,669 INFO L226 Difference]: Without dead ends: 150 [2021-11-20 06:17:17,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:17:17,670 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 93 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:17,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 286 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:17:17,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-20 06:17:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 141. [2021-11-20 06:17:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.1544117647058822) internal successors, (157), 140 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 157 transitions. [2021-11-20 06:17:17,675 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 157 transitions. Word has length 56 [2021-11-20 06:17:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:17,675 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 157 transitions. [2021-11-20 06:17:17,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 157 transitions. [2021-11-20 06:17:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:17:17,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:17,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-20 06:17:17,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:17,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:17:17,897 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:17,898 INFO L85 PathProgramCache]: Analyzing trace with hash 74449076, now seen corresponding path program 3 times [2021-11-20 06:17:17,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:17,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570629881] [2021-11-20 06:17:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:17,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:17:18,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:18,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570629881] [2021-11-20 06:17:18,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570629881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:18,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226532954] [2021-11-20 06:17:18,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:17:18,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:18,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:18,248 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:18,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:17:18,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:17:18,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:18,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 06:17:18,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:18,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:17:18,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:17:18,404 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 06:17:18,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-20 06:17:18,413 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:17:18,414 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 23 treesize of output 23 [2021-11-20 06:17:18,738 INFO L354 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2021-11-20 06:17:18,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 38 [2021-11-20 06:17:19,429 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 38 treesize of output 37 [2021-11-20 06:17:19,844 INFO L354 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2021-11-20 06:17:19,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 45 [2021-11-20 06:17:19,860 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 06:17:19,861 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 39 treesize of output 41 [2021-11-20 06:17:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:17:20,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:21,510 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:17:21,511 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 56 treesize of output 55 [2021-11-20 06:17:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:17:25,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226532954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:25,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:25,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2021-11-20 06:17:25,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139512672] [2021-11-20 06:17:25,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:25,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:17:25,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:17:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-11-20 06:17:25,394 INFO L87 Difference]: Start difference. First operand 141 states and 157 transitions. Second operand has 32 states, 31 states have (on average 5.064516129032258) internal successors, (157), 32 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:26,569 INFO L93 Difference]: Finished difference Result 262 states and 301 transitions. [2021-11-20 06:17:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:17:26,574 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.064516129032258) internal successors, (157), 32 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-20 06:17:26,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:26,576 INFO L225 Difference]: With dead ends: 262 [2021-11-20 06:17:26,576 INFO L226 Difference]: Without dead ends: 262 [2021-11-20 06:17:26,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 106 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=443, Invalid=1627, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 06:17:26,577 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 256 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:26,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 372 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 229 Invalid, 0 Unknown, 467 Unchecked, 0.2s Time] [2021-11-20 06:17:26,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-20 06:17:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-11-20 06:17:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.17578125) internal successors, (301), 260 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 301 transitions. [2021-11-20 06:17:26,585 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 301 transitions. Word has length 60 [2021-11-20 06:17:26,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:26,585 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 301 transitions. [2021-11-20 06:17:26,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.064516129032258) internal successors, (157), 32 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 301 transitions. [2021-11-20 06:17:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 06:17:26,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:26,587 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-11-20 06:17:26,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:26,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:17:26,805 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:26,805 INFO L85 PathProgramCache]: Analyzing trace with hash -486328060, now seen corresponding path program 1 times [2021-11-20 06:17:26,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:26,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085884366] [2021-11-20 06:17:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:26,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 33 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:17:26,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:26,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085884366] [2021-11-20 06:17:26,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085884366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:26,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623422452] [2021-11-20 06:17:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:26,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:26,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:26,981 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:26,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:17:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:27,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:17:27,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:27,519 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-20 06:17:27,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-20 06:17:27,529 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:17:27,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-20 06:17:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:17:27,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:27,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-11-20 06:17:27,952 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:17:27,953 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 49 treesize of output 48 [2021-11-20 06:17:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:17:28,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623422452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:28,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:28,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2021-11-20 06:17:28,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632338373] [2021-11-20 06:17:28,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:28,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:17:28,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:28,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:17:28,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:17:28,377 INFO L87 Difference]: Start difference. First operand 261 states and 301 transitions. Second operand has 21 states, 20 states have (on average 9.25) internal successors, (185), 21 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:29,110 INFO L93 Difference]: Finished difference Result 383 states and 441 transitions. [2021-11-20 06:17:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:17:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 9.25) internal successors, (185), 21 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-20 06:17:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:29,113 INFO L225 Difference]: With dead ends: 383 [2021-11-20 06:17:29,113 INFO L226 Difference]: Without dead ends: 383 [2021-11-20 06:17:29,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:17:29,115 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 98 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:29,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 400 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 232 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2021-11-20 06:17:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-20 06:17:29,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 175. [2021-11-20 06:17:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.1461988304093567) internal successors, (196), 174 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2021-11-20 06:17:29,130 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 70 [2021-11-20 06:17:29,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:29,130 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2021-11-20 06:17:29,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 9.25) internal successors, (185), 21 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2021-11-20 06:17:29,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 06:17:29,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:29,132 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-11-20 06:17:29,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:29,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:29,355 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:29,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:29,355 INFO L85 PathProgramCache]: Analyzing trace with hash 683173057, now seen corresponding path program 1 times [2021-11-20 06:17:29,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:29,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695726928] [2021-11-20 06:17:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:29,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 88 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:17:29,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:29,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695726928] [2021-11-20 06:17:29,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695726928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:29,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139801463] [2021-11-20 06:17:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:29,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:29,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:29,501 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:29,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:17:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:29,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:17:29,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:29,765 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 12 treesize of output 11 [2021-11-20 06:17:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:17:29,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:17:30,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139801463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:30,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:30,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-20 06:17:30,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056815213] [2021-11-20 06:17:30,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:30,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:17:30,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:30,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:17:30,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:17:30,266 INFO L87 Difference]: Start difference. First operand 175 states and 196 transitions. Second operand has 16 states, 15 states have (on average 7.133333333333334) internal successors, (107), 16 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:30,548 INFO L93 Difference]: Finished difference Result 223 states and 250 transitions. [2021-11-20 06:17:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:17:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 7.133333333333334) internal successors, (107), 16 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 06:17:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:30,549 INFO L225 Difference]: With dead ends: 223 [2021-11-20 06:17:30,550 INFO L226 Difference]: Without dead ends: 223 [2021-11-20 06:17:30,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:17:30,551 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 93 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:30,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 287 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:17:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-20 06:17:30,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 178. [2021-11-20 06:17:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.1436781609195403) internal successors, (199), 177 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 199 transitions. [2021-11-20 06:17:30,557 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 199 transitions. Word has length 76 [2021-11-20 06:17:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:30,557 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 199 transitions. [2021-11-20 06:17:30,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 7.133333333333334) internal successors, (107), 16 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 199 transitions. [2021-11-20 06:17:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 06:17:30,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:30,559 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-11-20 06:17:30,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:30,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 06:17:30,776 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:30,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117148, now seen corresponding path program 2 times [2021-11-20 06:17:30,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:30,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896371664] [2021-11-20 06:17:30,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:30,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 13 proven. 137 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:17:30,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:30,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896371664] [2021-11-20 06:17:30,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896371664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:30,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722815789] [2021-11-20 06:17:30,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:17:30,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:30,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:30,891 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:30,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:17:30,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:17:30,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:30,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:17:30,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:17:31,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:17:31,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722815789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:31,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:31,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-11-20 06:17:31,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713069166] [2021-11-20 06:17:31,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:31,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:17:31,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:31,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:17:31,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:17:31,425 INFO L87 Difference]: Start difference. First operand 178 states and 199 transitions. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:31,788 INFO L93 Difference]: Finished difference Result 220 states and 242 transitions. [2021-11-20 06:17:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:17:31,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-20 06:17:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:31,790 INFO L225 Difference]: With dead ends: 220 [2021-11-20 06:17:31,790 INFO L226 Difference]: Without dead ends: 220 [2021-11-20 06:17:31,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:17:31,791 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 293 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:31,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 227 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:17:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-20 06:17:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 176. [2021-11-20 06:17:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.127906976744186) internal successors, (194), 175 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 194 transitions. [2021-11-20 06:17:31,797 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 194 transitions. Word has length 80 [2021-11-20 06:17:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:31,798 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 194 transitions. [2021-11-20 06:17:31,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:31,798 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 194 transitions. [2021-11-20 06:17:31,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 06:17:31,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:31,799 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-11-20 06:17:31,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:32,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:32,019 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:32,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:32,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2063647327, now seen corresponding path program 4 times [2021-11-20 06:17:32,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:32,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173817966] [2021-11-20 06:17:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:32,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:17:32,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:32,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173817966] [2021-11-20 06:17:32,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173817966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:32,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963170673] [2021-11-20 06:17:32,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:17:32,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:32,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:32,153 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:32,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:17:32,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:17:32,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:32,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:17:32,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 120 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:17:32,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 120 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:17:32,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963170673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:32,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:32,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-20 06:17:32,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227146872] [2021-11-20 06:17:32,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:32,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:17:32,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:17:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:17:32,709 INFO L87 Difference]: Start difference. First operand 176 states and 194 transitions. Second operand has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:32,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:32,921 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2021-11-20 06:17:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:17:32,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-20 06:17:32,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:32,926 INFO L225 Difference]: With dead ends: 180 [2021-11-20 06:17:32,926 INFO L226 Difference]: Without dead ends: 180 [2021-11-20 06:17:32,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:17:32,928 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 85 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:32,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 307 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:17:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-20 06:17:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2021-11-20 06:17:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.1104651162790697) internal successors, (191), 175 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 191 transitions. [2021-11-20 06:17:32,943 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 191 transitions. Word has length 89 [2021-11-20 06:17:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:32,943 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 191 transitions. [2021-11-20 06:17:32,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:32,944 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 191 transitions. [2021-11-20 06:17:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 06:17:32,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:32,945 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-11-20 06:17:32,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:33,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 06:17:33,173 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1589191926, now seen corresponding path program 5 times [2021-11-20 06:17:33,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:33,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118902808] [2021-11-20 06:17:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:33,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 52 proven. 134 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 06:17:33,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:33,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118902808] [2021-11-20 06:17:33,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118902808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:33,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021758664] [2021-11-20 06:17:33,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:17:33,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:33,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:33,293 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:33,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:17:33,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 06:17:33,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:33,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:17:33,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 121 proven. 17 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:17:33,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 121 proven. 17 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:17:33,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021758664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:17:33,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:17:33,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2021-11-20 06:17:33,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201748515] [2021-11-20 06:17:33,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:33,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:17:33,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:33,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:17:33,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:17:33,903 INFO L87 Difference]: Start difference. First operand 176 states and 191 transitions. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:17:34,308 INFO L93 Difference]: Finished difference Result 197 states and 212 transitions. [2021-11-20 06:17:34,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:17:34,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-20 06:17:34,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:17:34,310 INFO L225 Difference]: With dead ends: 197 [2021-11-20 06:17:34,310 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 06:17:34,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=277, Invalid=845, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:17:34,311 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 170 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:17:34,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 195 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:17:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 06:17:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 188. [2021-11-20 06:17:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.1032608695652173) internal successors, (203), 187 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2021-11-20 06:17:34,322 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 94 [2021-11-20 06:17:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:17:34,322 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2021-11-20 06:17:34,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:34,323 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2021-11-20 06:17:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:17:34,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:17:34,325 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-11-20 06:17:34,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:17:34,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:17:34,537 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-20 06:17:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:34,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1513850931, now seen corresponding path program 6 times [2021-11-20 06:17:34,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:34,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864747979] [2021-11-20 06:17:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:34,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 06:17:35,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:35,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864747979] [2021-11-20 06:17:35,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864747979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:35,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529125785] [2021-11-20 06:17:35,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:17:35,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:35,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:35,069 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:35,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89ffbb64-f776-4ca5-a30c-11eb635df391/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:17:35,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 06:17:35,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:35,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-20 06:17:35,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:35,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 06:17:35,497 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:17:35,497 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 11 treesize of output 11 [2021-11-20 06:17:35,609 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 26 treesize of output 25 [2021-11-20 06:17:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:35,901 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 24 treesize of output 23 [2021-11-20 06:17:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:36,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:17:36,037 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 06:17:36,037 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2021-11-20 06:17:36,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:17:36,211 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 06:17:36,211 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2021-11-20 06:17:36,661 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 31 treesize of output 30 [2021-11-20 06:17:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:36,862 INFO L354 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2021-11-20 06:17:36,862 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 62 [2021-11-20 06:17:37,097 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 06:17:37,098 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 16 treesize of output 18 [2021-11-20 06:17:37,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-20 06:17:37,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:17:37,339 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-20 06:17:37,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 53 [2021-11-20 06:17:37,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:37,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:17:37,738 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-20 06:17:37,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 63 [2021-11-20 06:17:38,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:38,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:38,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:17:38,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:38,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:38,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:38,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:17:38,389 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-11-20 06:17:38,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 78 treesize of output 84 [2021-11-20 06:17:41,208 INFO L354 Elim1Store]: treesize reduction 267, result has 11.9 percent of original size [2021-11-20 06:17:41,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 126 treesize of output 103 [2021-11-20 06:17:41,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 80 [2021-11-20 06:17:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 10 proven. 232 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:17:42,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:18:28,515 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:18:28,515 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 235 treesize of output 234 [2021-11-20 06:19:20,719 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_107| Int) (|ULTIMATE.start_foo_#t~mem3#1| Int) (|ULTIMATE.start_foo_~#a~0#1.base| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_153| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_151| Int) (|v_ULTIMATE.start_foo_~i~1#1_131| Int) (|v_ULTIMATE.start_bar_~i~0#1_92| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_149| Int) (|v_ULTIMATE.start_main_#t~ret6#1_95| Int) (|ULTIMATE.start_main_~i~2#1| Int)) (let ((.cse6 (store |c_#memory_int| |ULTIMATE.start_foo_~#a~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_foo_~#a~0#1.base|) 0 |ULTIMATE.start_foo_#t~mem3#1|)))) (let ((.cse3 (store (select .cse6 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~i~2#1| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_95|))) (let ((.cse0 (store .cse6 |c_ULTIMATE.start_main_~#b~0#1.base| .cse3))) (let ((.cse4 (store (select .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107|) 0 |v_ULTIMATE.start_foo_#t~mem3#1_153|))) (let ((.cse1 (store .cse4 4 |v_ULTIMATE.start_foo_#t~mem3#1_151|)) (.cse2 (* |v_ULTIMATE.start_foo_~i~1#1_131| 4))) (or (< |v_ULTIMATE.start_bar_~i~0#1_92| |ULTIMATE.start_main_~i~2#1|) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_107|) (< |v_ULTIMATE.start_foo_~i~1#1_131| 2) (< |ULTIMATE.start_main_~i~2#1| |v_ULTIMATE.start_bar_~i~0#1_92|) (< |v_ULTIMATE.start_foo_~i~1#1_131| |ULTIMATE.start_main_~i~2#1|) (< |v_ULTIMATE.start_foo_#t~mem3#1_149| (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse1) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2))) (< |v_ULTIMATE.start_foo_#t~mem3#1_153| (select .cse3 |c_ULTIMATE.start_main_~#b~0#1.offset|)) (<= (+ |ULTIMATE.start_main_~i~2#1| 1) |v_ULTIMATE.start_foo_~i~1#1_131|) (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (< |v_ULTIMATE.start_foo_#t~mem3#1_151| (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse4) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4))) (<= |v_ULTIMATE.start_main_#t~ret6#1_95| 1) (< 0 (let ((.cse5 (store .cse1 .cse2 |v_ULTIMATE.start_foo_#t~mem3#1_149|))) (+ (select .cse5 (* |v_ULTIMATE.start_bar_~i~0#1_92| 4)) (select .cse5 0) (select .cse5 4))))))))))) is different from false [2021-11-20 06:19:25,474 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_107| Int) (|ULTIMATE.start_foo_#t~mem3#1| Int) (|ULTIMATE.start_foo_~#a~0#1.base| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_153| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_151| Int) (|v_ULTIMATE.start_foo_~i~1#1_131| Int) (|v_ULTIMATE.start_bar_~i~0#1_92| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_149| Int) (|v_ULTIMATE.start_main_#t~ret6#1_95| Int) (|v_ULTIMATE.start_main_~i~2#1_102| Int)) (let ((.cse6 (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~2#1| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |c_ULTIMATE.start_main_#t~ret6#1|)))) (store .cse7 |ULTIMATE.start_foo_~#a~0#1.base| (store (select .cse7 |ULTIMATE.start_foo_~#a~0#1.base|) 0 |ULTIMATE.start_foo_#t~mem3#1|))))) (let ((.cse4 (store (select .cse6 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_102| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_95|))) (let ((.cse0 (store .cse6 |c_ULTIMATE.start_main_~#b~0#1.base| .cse4))) (let ((.cse3 (store (select .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107|) 0 |v_ULTIMATE.start_foo_#t~mem3#1_153|))) (let ((.cse1 (store .cse3 4 |v_ULTIMATE.start_foo_#t~mem3#1_151|)) (.cse2 (* |v_ULTIMATE.start_foo_~i~1#1_131| 4))) (or (< |v_ULTIMATE.start_foo_~i~1#1_131| |v_ULTIMATE.start_main_~i~2#1_102|) (<= (+ |v_ULTIMATE.start_main_~i~2#1_102| 1) |v_ULTIMATE.start_foo_~i~1#1_131|) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_107|) (< |v_ULTIMATE.start_foo_#t~mem3#1_149| (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse1) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2))) (< |v_ULTIMATE.start_foo_~i~1#1_131| 2) (< |v_ULTIMATE.start_foo_#t~mem3#1_151| (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse3) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4))) (< |v_ULTIMATE.start_bar_~i~0#1_92| |v_ULTIMATE.start_main_~i~2#1_102|) (< |v_ULTIMATE.start_foo_#t~mem3#1_153| (select .cse4 |c_ULTIMATE.start_main_~#b~0#1.offset|)) (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (< 0 (let ((.cse5 (store .cse1 .cse2 |v_ULTIMATE.start_foo_#t~mem3#1_149|))) (+ (select .cse5 (* |v_ULTIMATE.start_bar_~i~0#1_92| 4)) (select .cse5 0) (select .cse5 4)))) (< |v_ULTIMATE.start_main_~i~2#1_102| |v_ULTIMATE.start_bar_~i~0#1_92|) (<= |v_ULTIMATE.start_main_#t~ret6#1_95| 1)))))))) is different from false [2021-11-20 06:19:29,970 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~ret6#1_97| Int)) (or (< |v_ULTIMATE.start_main_#t~ret6#1_97| |c_ULTIMATE.start_foo_#res#1|) (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_107| Int) (|ULTIMATE.start_foo_#t~mem3#1| Int) (|ULTIMATE.start_foo_~#a~0#1.base| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_153| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_151| Int) (|v_ULTIMATE.start_foo_~i~1#1_131| Int) (|v_ULTIMATE.start_bar_~i~0#1_92| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_149| Int) (|v_ULTIMATE.start_main_#t~ret6#1_95| Int) (|v_ULTIMATE.start_main_~i~2#1_102| Int)) (let ((.cse6 (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~2#1| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_97|)))) (store .cse7 |ULTIMATE.start_foo_~#a~0#1.base| (store (select .cse7 |ULTIMATE.start_foo_~#a~0#1.base|) 0 |ULTIMATE.start_foo_#t~mem3#1|))))) (let ((.cse3 (store (select .cse6 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_102| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_95|))) (let ((.cse4 (store .cse6 |c_ULTIMATE.start_main_~#b~0#1.base| .cse3))) (let ((.cse5 (store (select .cse4 |v_ULTIMATE.start_foo_~#a~0#1.base_107|) 0 |v_ULTIMATE.start_foo_#t~mem3#1_153|))) (let ((.cse1 (store .cse5 4 |v_ULTIMATE.start_foo_#t~mem3#1_151|)) (.cse2 (* |v_ULTIMATE.start_foo_~i~1#1_131| 4))) (or (< |v_ULTIMATE.start_foo_~i~1#1_131| |v_ULTIMATE.start_main_~i~2#1_102|) (<= (+ |v_ULTIMATE.start_main_~i~2#1_102| 1) |v_ULTIMATE.start_foo_~i~1#1_131|) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_107|) (< 0 (let ((.cse0 (store .cse1 .cse2 |v_ULTIMATE.start_foo_#t~mem3#1_149|))) (+ (select .cse0 (* |v_ULTIMATE.start_bar_~i~0#1_92| 4)) (select .cse0 4) (select .cse0 0)))) (< |v_ULTIMATE.start_foo_~i~1#1_131| 2) (< |v_ULTIMATE.start_bar_~i~0#1_92| |v_ULTIMATE.start_main_~i~2#1_102|) (< |v_ULTIMATE.start_foo_#t~mem3#1_153| (select .cse3 |c_ULTIMATE.start_main_~#b~0#1.offset|)) (< |v_ULTIMATE.start_foo_#t~mem3#1_149| (select (select (store .cse4 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse1) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2))) (< |v_ULTIMATE.start_foo_#t~mem3#1_151| (select (select (store .cse4 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse5) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (< |v_ULTIMATE.start_main_~i~2#1_102| |v_ULTIMATE.start_bar_~i~0#1_92|) (<= |v_ULTIMATE.start_main_#t~ret6#1_95| 1)))))))))) is different from false [2021-11-20 06:19:33,587 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_107| Int) (|ULTIMATE.start_foo_#t~mem3#1| Int) (|ULTIMATE.start_foo_~#a~0#1.base| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_153| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_151| Int) (|v_ULTIMATE.start_foo_~i~1#1_131| Int) (|v_ULTIMATE.start_bar_~i~0#1_92| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_149| Int) (|v_ULTIMATE.start_main_#t~ret6#1_95| Int) (|v_ULTIMATE.start_main_#t~ret6#1_97| Int) (|v_ULTIMATE.start_main_~i~2#1_102| Int)) (let ((.cse6 (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~2#1| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_97|)))) (store .cse7 |ULTIMATE.start_foo_~#a~0#1.base| (store (select .cse7 |ULTIMATE.start_foo_~#a~0#1.base|) 0 |ULTIMATE.start_foo_#t~mem3#1|))))) (let ((.cse3 (store (select .cse6 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_102| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_95|))) (let ((.cse4 (store .cse6 |c_ULTIMATE.start_main_~#b~0#1.base| .cse3))) (let ((.cse5 (store (select .cse4 |v_ULTIMATE.start_foo_~#a~0#1.base_107|) 0 |v_ULTIMATE.start_foo_#t~mem3#1_153|))) (let ((.cse1 (store .cse5 4 |v_ULTIMATE.start_foo_#t~mem3#1_151|)) (.cse2 (* |v_ULTIMATE.start_foo_~i~1#1_131| 4))) (or (< |v_ULTIMATE.start_foo_~i~1#1_131| |v_ULTIMATE.start_main_~i~2#1_102|) (<= (+ |v_ULTIMATE.start_main_~i~2#1_102| 1) |v_ULTIMATE.start_foo_~i~1#1_131|) (< |v_ULTIMATE.start_main_#t~ret6#1_97| |c_ULTIMATE.start_foo_~i~1#1|) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_107|) (< 0 (let ((.cse0 (store .cse1 .cse2 |v_ULTIMATE.start_foo_#t~mem3#1_149|))) (+ (select .cse0 (* |v_ULTIMATE.start_bar_~i~0#1_92| 4)) (select .cse0 4) (select .cse0 0)))) (< |v_ULTIMATE.start_foo_~i~1#1_131| 2) (< |v_ULTIMATE.start_bar_~i~0#1_92| |v_ULTIMATE.start_main_~i~2#1_102|) (< |v_ULTIMATE.start_foo_#t~mem3#1_153| (select .cse3 |c_ULTIMATE.start_main_~#b~0#1.offset|)) (< |v_ULTIMATE.start_foo_#t~mem3#1_149| (select (select (store .cse4 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse1) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2))) (< |v_ULTIMATE.start_foo_#t~mem3#1_151| (select (select (store .cse4 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse5) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |ULTIMATE.start_foo_~#a~0#1.base|) (< |v_ULTIMATE.start_main_~i~2#1_102| |v_ULTIMATE.start_bar_~i~0#1_92|) (<= |v_ULTIMATE.start_main_#t~ret6#1_95| 1)))))))) is different from false [2021-11-20 06:19:47,146 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_107| Int) (|ULTIMATE.start_foo_#t~mem3#1| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_153| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_151| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_111| Int) (|v_ULTIMATE.start_foo_~i~1#1_131| Int) (|v_ULTIMATE.start_bar_~i~0#1_92| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_149| Int) (|v_ULTIMATE.start_main_#t~ret6#1_95| Int) (|v_ULTIMATE.start_main_#t~ret6#1_97| Int) (|v_ULTIMATE.start_main_~i~2#1_102| Int)) (let ((.cse6 (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~2#1| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_97|)))) (store .cse7 |v_ULTIMATE.start_foo_~#a~0#1.base_111| (store (select .cse7 |v_ULTIMATE.start_foo_~#a~0#1.base_111|) 0 |ULTIMATE.start_foo_#t~mem3#1|))))) (let ((.cse5 (store (select .cse6 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_102| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_95|))) (let ((.cse0 (store .cse6 |c_ULTIMATE.start_main_~#b~0#1.base| .cse5))) (let ((.cse1 (store (select .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107|) 0 |v_ULTIMATE.start_foo_#t~mem3#1_153|))) (let ((.cse3 (store .cse1 4 |v_ULTIMATE.start_foo_#t~mem3#1_151|)) (.cse4 (* |v_ULTIMATE.start_foo_~i~1#1_131| 4))) (or (< |v_ULTIMATE.start_foo_~i~1#1_131| |v_ULTIMATE.start_main_~i~2#1_102|) (<= (+ |v_ULTIMATE.start_main_~i~2#1_102| 1) |v_ULTIMATE.start_foo_~i~1#1_131|) (< |v_ULTIMATE.start_main_#t~ret6#1_97| |c_ULTIMATE.start_foo_~i~1#1|) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_107|) (< |v_ULTIMATE.start_foo_#t~mem3#1_151| (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse1) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_111|) (< |v_ULTIMATE.start_foo_~i~1#1_131| 2) (< |v_ULTIMATE.start_bar_~i~0#1_92| |v_ULTIMATE.start_main_~i~2#1_102|) (< 0 (let ((.cse2 (store .cse3 .cse4 |v_ULTIMATE.start_foo_#t~mem3#1_149|))) (+ (select .cse2 (* |v_ULTIMATE.start_bar_~i~0#1_92| 4)) (select .cse2 4) (select .cse2 0)))) (< |v_ULTIMATE.start_foo_#t~mem3#1_149| (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse3) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse4))) (< |v_ULTIMATE.start_foo_#t~mem3#1_153| (select .cse5 |c_ULTIMATE.start_main_~#b~0#1.offset|)) (< |v_ULTIMATE.start_main_~i~2#1_102| |v_ULTIMATE.start_bar_~i~0#1_92|) (<= |v_ULTIMATE.start_main_#t~ret6#1_95| 1)))))))) is different from false [2021-11-20 06:19:52,003 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_107| Int) (|ULTIMATE.start_foo_#t~mem3#1| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_153| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_151| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_111| Int) (|v_ULTIMATE.start_foo_~i~1#1_131| Int) (|v_ULTIMATE.start_bar_~i~0#1_92| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_149| Int) (|v_ULTIMATE.start_main_#t~ret6#1_95| Int) (|v_ULTIMATE.start_main_#t~ret6#1_97| Int) (|v_ULTIMATE.start_main_~i~2#1_102| Int)) (let ((.cse6 (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~2#1| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_97|)))) (store .cse7 |v_ULTIMATE.start_foo_~#a~0#1.base_111| (store (select .cse7 |v_ULTIMATE.start_foo_~#a~0#1.base_111|) 0 |ULTIMATE.start_foo_#t~mem3#1|))))) (let ((.cse5 (store (select .cse6 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_102| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_95|))) (let ((.cse0 (store .cse6 |c_ULTIMATE.start_main_~#b~0#1.base| .cse5))) (let ((.cse1 (store (select .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107|) 0 |v_ULTIMATE.start_foo_#t~mem3#1_153|))) (let ((.cse3 (store .cse1 4 |v_ULTIMATE.start_foo_#t~mem3#1_151|)) (.cse4 (* |v_ULTIMATE.start_foo_~i~1#1_131| 4))) (or (< |v_ULTIMATE.start_foo_~i~1#1_131| |v_ULTIMATE.start_main_~i~2#1_102|) (<= (+ |v_ULTIMATE.start_main_~i~2#1_102| 1) |v_ULTIMATE.start_foo_~i~1#1_131|) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_107|) (< |v_ULTIMATE.start_main_#t~ret6#1_97| (+ |c_ULTIMATE.start_foo_~i~1#1| 1)) (< |v_ULTIMATE.start_foo_#t~mem3#1_151| (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse1) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_111|) (< |v_ULTIMATE.start_foo_~i~1#1_131| 2) (< |v_ULTIMATE.start_bar_~i~0#1_92| |v_ULTIMATE.start_main_~i~2#1_102|) (< 0 (let ((.cse2 (store .cse3 .cse4 |v_ULTIMATE.start_foo_#t~mem3#1_149|))) (+ (select .cse2 (* |v_ULTIMATE.start_bar_~i~0#1_92| 4)) (select .cse2 4) (select .cse2 0)))) (< |v_ULTIMATE.start_foo_#t~mem3#1_149| (select (select (store .cse0 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse3) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse4))) (< |v_ULTIMATE.start_foo_#t~mem3#1_153| (select .cse5 |c_ULTIMATE.start_main_~#b~0#1.offset|)) (< |v_ULTIMATE.start_main_~i~2#1_102| |v_ULTIMATE.start_bar_~i~0#1_92|) (<= |v_ULTIMATE.start_main_#t~ret6#1_95| 1)))))))) is different from false [2021-11-20 06:19:57,562 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_foo_~#a~0#1.base_111| Int) (|v_ULTIMATE.start_foo_~i~1#1_131| Int) (|v_ULTIMATE.start_bar_~i~0#1_92| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_149| Int) (|v_ULTIMATE.start_main_~i~2#1_102| Int) (|v_ULTIMATE.start_foo_~#a~0#1.base_107| Int) (|ULTIMATE.start_foo_#t~mem3#1| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_153| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_161| Int) (|v_ULTIMATE.start_foo_#t~mem3#1_151| Int) (|v_ULTIMATE.start_main_#t~ret6#1_95| Int) (|v_ULTIMATE.start_main_#t~ret6#1_97| Int)) (let ((.cse6 (let ((.cse7 (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_foo_~#a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_foo_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_foo_~i~1#1| 4) |c_ULTIMATE.start_foo_~#a~0#1.offset|) |ULTIMATE.start_foo_#t~mem3#1|)))) (store .cse8 |c_ULTIMATE.start_main_~#b~0#1.base| (store (select .cse8 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~2#1| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_97|))))) (store .cse7 |v_ULTIMATE.start_foo_~#a~0#1.base_111| (store (select .cse7 |v_ULTIMATE.start_foo_~#a~0#1.base_111|) 0 |v_ULTIMATE.start_foo_#t~mem3#1_161|))))) (let ((.cse0 (store (select .cse6 |c_ULTIMATE.start_main_~#b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_102| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|) |v_ULTIMATE.start_main_#t~ret6#1_95|))) (let ((.cse1 (store .cse6 |c_ULTIMATE.start_main_~#b~0#1.base| .cse0))) (let ((.cse2 (store (select .cse1 |v_ULTIMATE.start_foo_~#a~0#1.base_107|) 0 |v_ULTIMATE.start_foo_#t~mem3#1_153|))) (let ((.cse4 (store .cse2 4 |v_ULTIMATE.start_foo_#t~mem3#1_151|)) (.cse5 (* |v_ULTIMATE.start_foo_~i~1#1_131| 4))) (or (< |v_ULTIMATE.start_foo_~i~1#1_131| |v_ULTIMATE.start_main_~i~2#1_102|) (< |v_ULTIMATE.start_foo_#t~mem3#1_153| (select .cse0 |c_ULTIMATE.start_main_~#b~0#1.offset|)) (<= (+ |v_ULTIMATE.start_main_~i~2#1_102| 1) |v_ULTIMATE.start_foo_~i~1#1_131|) (< |v_ULTIMATE.start_foo_#t~mem3#1_151| (select (select (store .cse1 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse2) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4))) (< 0 (let ((.cse3 (store .cse4 .cse5 |v_ULTIMATE.start_foo_#t~mem3#1_149|))) (+ (select .cse3 (* |v_ULTIMATE.start_bar_~i~0#1_92| 4)) (select .cse3 4) (select .cse3 0)))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_107|) (< |v_ULTIMATE.start_main_#t~ret6#1_97| (+ |c_ULTIMATE.start_foo_~i~1#1| 1)) (= |c_ULTIMATE.start_main_~#b~0#1.base| |v_ULTIMATE.start_foo_~#a~0#1.base_111|) (< |v_ULTIMATE.start_foo_~i~1#1_131| 2) (< |v_ULTIMATE.start_foo_#t~mem3#1_149| (select (select (store .cse1 |v_ULTIMATE.start_foo_~#a~0#1.base_107| .cse4) |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse5))) (< |v_ULTIMATE.start_bar_~i~0#1_92| |v_ULTIMATE.start_main_~i~2#1_102|) (< |v_ULTIMATE.start_main_~i~2#1_102| |v_ULTIMATE.start_bar_~i~0#1_92|) (<= |v_ULTIMATE.start_main_#t~ret6#1_95| 1)))))))) is different from false [2021-11-20 06:20:28,213 INFO L354 Elim1Store]: treesize reduction 1638, result has 11.0 percent of original size [2021-11-20 06:20:28,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 14 case distinctions, treesize of input 44157269 treesize of output 44041612 [2021-11-20 06:24:30,581 WARN L227 SmtUtils]: Spent 4.04m on a formula simplification. DAG size of input: 9633 DAG size of output: 8185 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:26:04,624 WARN L227 SmtUtils]: Spent 1.57m on a formula simplification that was a NOOP. DAG size: 8169 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:26:05,299 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-11-20 06:26:05,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27798920 treesize of output 27700608 [2021-11-20 06:27:37,935 WARN L227 SmtUtils]: Spent 1.54m on a formula simplification that was a NOOP. DAG size: 8171 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:27:38,615 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-11-20 06:27:38,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27700608 treesize of output 27045252 [2021-11-20 06:29:11,462 WARN L227 SmtUtils]: Spent 1.55m on a formula simplification that was a NOOP. DAG size: 8181 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:29:12,046 INFO L354 Elim1Store]: treesize reduction 47, result has 50.0 percent of original size [2021-11-20 06:29:12,055 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 27045252 treesize of output 25669013