./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/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_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/indp1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9d155444443faf1f00dab96cdb68719b0ba1edb1979e11b3fea5d29001e4f12f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:29:49,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:29:49,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:29:49,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:29:49,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:29:49,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:29:49,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:29:49,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:29:49,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:29:49,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:29:49,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:29:49,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:29:49,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:29:49,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:29:49,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:29:49,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:29:49,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:29:49,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:29:49,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:29:49,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:29:49,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:29:49,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:29:49,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:29:49,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:29:49,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:29:49,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:29:49,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:29:49,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:29:49,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:29:49,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:29:49,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:29:49,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:29:49,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:29:49,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:29:49,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:29:49,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:29:49,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:29:49,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:29:49,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:29:49,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:29:49,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:29:49,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:29:49,188 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:29:49,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:29:49,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:29:49,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:29:49,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:29:49,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:29:49,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:29:49,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:29:49,201 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:29:49,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:29:49,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:29:49,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:29:49,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:29:49,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:29:49,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:29:49,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:29:49,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:29:49,205 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:29:49,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:29:49,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:29:49,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:29:49,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:29:49,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:29:49,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:29:49,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:29:49,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:29:49,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:29:49,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:29:49,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:29:49,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:29:49,208 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:29:49,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:29:49,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:29:49,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:29:49,209 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_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d155444443faf1f00dab96cdb68719b0ba1edb1979e11b3fea5d29001e4f12f [2021-11-20 07:29:49,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:29:49,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:29:49,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:29:49,595 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:29:49,596 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:29:49,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-fpi/indp1.c [2021-11-20 07:29:49,724 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/data/5b483f8ac/562b085a2dfc42acb874aa8ed27fa6fc/FLAG6fbbb0118 [2021-11-20 07:29:50,294 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:29:50,295 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/sv-benchmarks/c/array-fpi/indp1.c [2021-11-20 07:29:50,303 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/data/5b483f8ac/562b085a2dfc42acb874aa8ed27fa6fc/FLAG6fbbb0118 [2021-11-20 07:29:50,671 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/data/5b483f8ac/562b085a2dfc42acb874aa8ed27fa6fc [2021-11-20 07:29:50,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:29:50,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:29:50,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:29:50,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:29:50,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:29:50,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:29:50" (1/1) ... [2021-11-20 07:29:50,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44bdd674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:50, skipping insertion in model container [2021-11-20 07:29:50,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:29:50" (1/1) ... [2021-11-20 07:29:50,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:29:50,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:29:50,932 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/sv-benchmarks/c/array-fpi/indp1.c[588,601] [2021-11-20 07:29:50,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:29:50,965 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:29:50,985 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/sv-benchmarks/c/array-fpi/indp1.c[588,601] [2021-11-20 07:29:51,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:29:51,033 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:29:51,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51 WrapperNode [2021-11-20 07:29:51,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:29:51,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:29:51,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:29:51,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:29:51,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51" (1/1) ... [2021-11-20 07:29:51,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51" (1/1) ... [2021-11-20 07:29:51,108 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-20 07:29:51,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:29:51,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:29:51,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:29:51,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:29:51,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51" (1/1) ... [2021-11-20 07:29:51,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51" (1/1) ... [2021-11-20 07:29:51,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51" (1/1) ... [2021-11-20 07:29:51,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51" (1/1) ... [2021-11-20 07:29:51,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51" (1/1) ... [2021-11-20 07:29:51,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51" (1/1) ... [2021-11-20 07:29:51,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51" (1/1) ... [2021-11-20 07:29:51,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:29:51,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:29:51,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:29:51,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:29:51,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51" (1/1) ... [2021-11-20 07:29:51,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:29:51,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:51,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:29:51,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:29:51,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:29:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:29:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:29:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:29:51,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:29:51,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:29:51,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:29:51,370 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:29:51,372 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:29:51,550 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:29:51,558 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:29:51,558 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 07:29:51,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:29:51 BoogieIcfgContainer [2021-11-20 07:29:51,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:29:51,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:29:51,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:29:51,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:29:51,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:29:50" (1/3) ... [2021-11-20 07:29:51,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb45656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:29:51, skipping insertion in model container [2021-11-20 07:29:51,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:51" (2/3) ... [2021-11-20 07:29:51,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb45656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:29:51, skipping insertion in model container [2021-11-20 07:29:51,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:29:51" (3/3) ... [2021-11-20 07:29:51,572 INFO L111 eAbstractionObserver]: Analyzing ICFG indp1.c [2021-11-20 07:29:51,590 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:29:51,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:29:51,647 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:29:51,657 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 07:29:51,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:29:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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 07:29:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 07:29:51,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:51,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:51,686 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:51,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2021-11-20 07:29:51,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:51,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648351156] [2021-11-20 07:29:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:51,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:51,882 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 07:29:51,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:51,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648351156] [2021-11-20 07:29:51,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648351156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:51,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:51,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:29:51,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623896348] [2021-11-20 07:29:51,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:51,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:29:51,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:51,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:29:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:29:51,950 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 07:29:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:51,970 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-11-20 07:29:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:29:51,972 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-11-20 07:29:51,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:51,983 INFO L225 Difference]: With dead ends: 44 [2021-11-20 07:29:51,983 INFO L226 Difference]: Without dead ends: 20 [2021-11-20 07:29:52,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:29:52,009 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:52,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:29:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-20 07:29:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-20 07:29:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 07:29:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-20 07:29:52,114 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2021-11-20 07:29:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:52,115 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-20 07:29:52,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 07:29:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-20 07:29:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 07:29:52,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:52,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:52,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:29:52,132 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:52,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:52,133 INFO L85 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2021-11-20 07:29:52,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:52,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822730222] [2021-11-20 07:29:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:52,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:52,266 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 07:29:52,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:52,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822730222] [2021-11-20 07:29:52,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822730222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:52,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:52,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:29:52,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224403851] [2021-11-20 07:29:52,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:52,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:29:52,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:52,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:29:52,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:52,273 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 07:29:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:52,372 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-11-20 07:29:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:29:52,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-11-20 07:29:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:52,378 INFO L225 Difference]: With dead ends: 45 [2021-11-20 07:29:52,378 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 07:29:52,379 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 07:29:52,382 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:52,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 07:29:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-20 07:29:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 07:29:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-20 07:29:52,400 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-20 07:29:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:52,403 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-20 07:29:52,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 07:29:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-20 07:29:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 07:29:52,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:52,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:52,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:29:52,412 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:52,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash 615941150, now seen corresponding path program 1 times [2021-11-20 07:29:52,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:52,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871343648] [2021-11-20 07:29:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:52,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:52,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:29:52,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285481667] [2021-11-20 07:29:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:52,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:52,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:52,455 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:52,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:29:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:52,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:29:52,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:52,666 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 07:29:52,735 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-20 07:29:52,819 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-20 07:29:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:52,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:53,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:29:53,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 70 [2021-11-20 07:29:53,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-11-20 07:29:53,690 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 21 treesize of output 10 [2021-11-20 07:29:56,980 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-11-20 07:29:56,981 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 62 treesize of output 49 [2021-11-20 07:29:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:57,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:57,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871343648] [2021-11-20 07:29:57,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:29:57,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285481667] [2021-11-20 07:29:57,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285481667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:57,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:57,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2021-11-20 07:29:57,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817628800] [2021-11-20 07:29:57,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:57,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:29:57,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:57,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:29:57,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:29:57,084 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 07:29:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:57,540 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-11-20 07:29:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:29:57,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 20 [2021-11-20 07:29:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:57,543 INFO L225 Difference]: With dead ends: 69 [2021-11-20 07:29:57,544 INFO L226 Difference]: Without dead ends: 67 [2021-11-20 07:29:57,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:29:57,546 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:57,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 77 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:29:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-20 07:29:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 42. [2021-11-20 07:29:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 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 07:29:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-20 07:29:57,560 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 20 [2021-11-20 07:29:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:57,561 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-20 07:29:57,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 07:29:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-20 07:29:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 07:29:57,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:57,563 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:57,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:57,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:57,777 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:57,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:57,778 INFO L85 PathProgramCache]: Analyzing trace with hash 678263444, now seen corresponding path program 1 times [2021-11-20 07:29:57,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:57,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482497688] [2021-11-20 07:29:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:57,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:57,795 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:29:57,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823873121] [2021-11-20 07:29:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:57,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:57,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:57,797 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:57,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:29:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:57,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:29:57,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:29:58,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:29:58,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482497688] [2021-11-20 07:29:58,097 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:29:58,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823873121] [2021-11-20 07:29:58,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823873121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:58,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:58,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 07:29:58,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665324998] [2021-11-20 07:29:58,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:58,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:29:58,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:58,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:29:58,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:29:58,104 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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 07:29:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:58,328 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2021-11-20 07:29:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:29:58,329 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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 24 [2021-11-20 07:29:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:58,333 INFO L225 Difference]: With dead ends: 110 [2021-11-20 07:29:58,333 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 07:29:58,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:29:58,340 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:58,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 44 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 07:29:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-11-20 07:29:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 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 07:29:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-20 07:29:58,374 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 24 [2021-11-20 07:29:58,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:58,375 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-20 07:29:58,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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 07:29:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-20 07:29:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 07:29:58,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:58,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:58,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:58,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:58,599 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash 900948378, now seen corresponding path program 2 times [2021-11-20 07:29:58,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:58,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382986756] [2021-11-20 07:29:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:58,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:58,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:29:58,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057150469] [2021-11-20 07:29:58,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:29:58,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:58,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:58,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:58,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:29:58,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:29:58,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:29:58,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:29:58,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:29:58,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:58,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382986756] [2021-11-20 07:29:58,921 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:29:58,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057150469] [2021-11-20 07:29:58,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057150469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:58,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:58,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 07:29:58,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975160270] [2021-11-20 07:29:58,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:58,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:29:58,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:29:58,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:29:58,929 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 07:29:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:59,105 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-11-20 07:29:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:29:59,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 24 [2021-11-20 07:29:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:59,107 INFO L225 Difference]: With dead ends: 69 [2021-11-20 07:29:59,107 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 07:29:59,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:29:59,109 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:59,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 38 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 07:29:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2021-11-20 07:29:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 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 07:29:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-11-20 07:29:59,118 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2021-11-20 07:29:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:59,119 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-11-20 07:29:59,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 07:29:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-11-20 07:29:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:29:59,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:59,121 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:59,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:59,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:59,347 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:59,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1587482582, now seen corresponding path program 3 times [2021-11-20 07:29:59,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:59,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339516814] [2021-11-20 07:29:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:59,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:59,362 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:29:59,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981724300] [2021-11-20 07:29:59,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:29:59,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:59,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:59,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:59,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:29:59,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 07:29:59,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:29:59,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:29:59,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:29:59,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:59,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339516814] [2021-11-20 07:29:59,855 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:29:59,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981724300] [2021-11-20 07:29:59,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981724300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:59,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:59,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 07:29:59,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931303440] [2021-11-20 07:29:59,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:59,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:29:59,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:59,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:29:59,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:29:59,857 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 07:30:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:00,092 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-11-20 07:30:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:30:00,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 28 [2021-11-20 07:30:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:00,094 INFO L225 Difference]: With dead ends: 107 [2021-11-20 07:30:00,095 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 07:30:00,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:30:00,096 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 107 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:00,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 56 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:30:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 07:30:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-11-20 07:30:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 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 07:30:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-11-20 07:30:00,109 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 28 [2021-11-20 07:30:00,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:00,110 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-11-20 07:30:00,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 07:30:00,110 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-11-20 07:30:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:30:00,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:00,112 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:00,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:00,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:00,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:00,329 INFO L85 PathProgramCache]: Analyzing trace with hash -227434410, now seen corresponding path program 4 times [2021-11-20 07:30:00,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:00,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405391649] [2021-11-20 07:30:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:00,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:00,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:30:00,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505525293] [2021-11-20 07:30:00,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:30:00,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:00,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:00,360 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:00,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:30:00,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:30:00,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:00,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:30:00,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:00,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:00,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:00,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405391649] [2021-11-20 07:30:00,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:30:00,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505525293] [2021-11-20 07:30:00,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505525293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:00,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:30:00,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 07:30:00,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213400646] [2021-11-20 07:30:00,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:00,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:30:00,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:30:00,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:30:00,713 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 07:30:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:01,003 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-11-20 07:30:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:30:01,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 28 [2021-11-20 07:30:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:01,005 INFO L225 Difference]: With dead ends: 91 [2021-11-20 07:30:01,005 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 07:30:01,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:30:01,007 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 88 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:01,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 84 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:30:01,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 07:30:01,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-11-20 07:30:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 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 07:30:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-11-20 07:30:01,017 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 28 [2021-11-20 07:30:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:01,017 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-11-20 07:30:01,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 07:30:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-11-20 07:30:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:30:01,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:01,020 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] [2021-11-20 07:30:01,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:01,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:01,243 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:01,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:01,244 INFO L85 PathProgramCache]: Analyzing trace with hash 341343694, now seen corresponding path program 2 times [2021-11-20 07:30:01,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:01,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750965271] [2021-11-20 07:30:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:01,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:01,255 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:30:01,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613701976] [2021-11-20 07:30:01,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:30:01,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:01,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:01,258 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:01,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:30:01,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:30:01,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:01,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 07:30:01,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:01,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:30:01,476 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 23 treesize of output 19 [2021-11-20 07:30:01,547 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 07:30:01,548 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 21 treesize of output 20 [2021-11-20 07:30:01,708 INFO L354 Elim1Store]: treesize reduction 365, result has 11.8 percent of original size [2021-11-20 07:30:01,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 98 treesize of output 113 [2021-11-20 07:30:01,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:01,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:01,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:01,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 50 [2021-11-20 07:30:01,844 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 07:30:01,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-20 07:30:02,030 INFO L354 Elim1Store]: treesize reduction 353, result has 12.2 percent of original size [2021-11-20 07:30:02,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 94 treesize of output 109 [2021-11-20 07:30:02,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:30:02,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:02,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:30:02,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 32 [2021-11-20 07:30:02,193 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 07:30:02,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-20 07:30:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:02,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:17,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:30:17,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 269 treesize of output 269 [2021-11-20 07:30:17,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-11-20 07:30:17,730 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 21 treesize of output 10 [2021-11-20 07:30:17,794 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 262 treesize of output 242 [2021-11-20 07:30:54,566 WARN L227 SmtUtils]: Spent 36.76s on a formula simplification. DAG size of input: 39 DAG size of output: 20 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 07:30:54,567 INFO L354 Elim1Store]: treesize reduction 69, result has 26.6 percent of original size [2021-11-20 07:30:54,567 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 637 treesize of output 616 [2021-11-20 07:31:00,123 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 7 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 07:31:14,204 WARN L227 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 07:31:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:14,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:14,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750965271] [2021-11-20 07:31:14,515 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:31:14,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613701976] [2021-11-20 07:31:14,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613701976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:14,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:31:14,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 29 [2021-11-20 07:31:14,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099794319] [2021-11-20 07:31:14,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:14,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 07:31:14,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 07:31:14,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=690, Unknown=4, NotChecked=0, Total=812 [2021-11-20 07:31:14,519 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 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 07:31:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:20,122 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2021-11-20 07:31:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 07:31:20,123 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 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 30 [2021-11-20 07:31:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:20,125 INFO L225 Difference]: With dead ends: 166 [2021-11-20 07:31:20,126 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 07:31:20,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=334, Invalid=2314, Unknown=4, NotChecked=0, Total=2652 [2021-11-20 07:31:20,130 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 186 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:20,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 275 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 07:31:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 07:31:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 85. [2021-11-20 07:31:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 84 states have internal predecessors, (97), 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 07:31:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2021-11-20 07:31:20,146 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 30 [2021-11-20 07:31:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:20,146 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2021-11-20 07:31:20,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 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 07:31:20,147 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2021-11-20 07:31:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:31:20,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:20,149 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:20,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:20,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 07:31:20,373 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:31:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:20,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2083150320, now seen corresponding path program 5 times [2021-11-20 07:31:20,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:20,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177349312] [2021-11-20 07:31:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:20,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:20,392 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:31:20,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762256721] [2021-11-20 07:31:20,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:31:20,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:20,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:20,400 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:20,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:34:38,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 07:34:38,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:34:38,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:34:38,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:34:38,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:38,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177349312] [2021-11-20 07:34:38,482 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:34:38,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762256721] [2021-11-20 07:34:38,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762256721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:38,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:34:38,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 07:34:38,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428282278] [2021-11-20 07:34:38,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:38,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:34:38,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:34:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:34:38,486 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 07:34:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:38,771 INFO L93 Difference]: Finished difference Result 196 states and 219 transitions. [2021-11-20 07:34:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:34:38,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 34 [2021-11-20 07:34:38,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:38,773 INFO L225 Difference]: With dead ends: 196 [2021-11-20 07:34:38,773 INFO L226 Difference]: Without dead ends: 157 [2021-11-20 07:34:38,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:34:38,775 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 158 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:38,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 90 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:34:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-20 07:34:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 123. [2021-11-20 07:34:38,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1311475409836065) internal successors, (138), 122 states have internal predecessors, (138), 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 07:34:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 138 transitions. [2021-11-20 07:34:38,798 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 138 transitions. Word has length 34 [2021-11-20 07:34:38,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:38,798 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 138 transitions. [2021-11-20 07:34:38,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 07:34:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 138 transitions. [2021-11-20 07:34:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:34:38,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:38,801 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:38,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:39,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:39,017 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:34:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:39,017 INFO L85 PathProgramCache]: Analyzing trace with hash 526321296, now seen corresponding path program 6 times [2021-11-20 07:34:39,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:39,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939670708] [2021-11-20 07:34:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:39,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:39,029 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:34:39,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767832750] [2021-11-20 07:34:39,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:34:39,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:39,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:39,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:39,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:34:39,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 07:34:39,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:39,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:34:39,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:34:39,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:34:39,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:39,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939670708] [2021-11-20 07:34:39,698 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:34:39,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767832750] [2021-11-20 07:34:39,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767832750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:39,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:34:39,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 07:34:39,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457953763] [2021-11-20 07:34:39,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:39,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:34:39,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:39,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:34:39,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:34:39,701 INFO L87 Difference]: Start difference. First operand 123 states and 138 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 07:34:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:40,090 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2021-11-20 07:34:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:34:40,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 34 [2021-11-20 07:34:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:40,093 INFO L225 Difference]: With dead ends: 161 [2021-11-20 07:34:40,093 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 07:34:40,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:34:40,095 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 130 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:40,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 122 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:34:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 07:34:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2021-11-20 07:34:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.09375) internal successors, (105), 96 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 07:34:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2021-11-20 07:34:40,111 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 34 [2021-11-20 07:34:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:40,112 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2021-11-20 07:34:40,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 07:34:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2021-11-20 07:34:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:34:40,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:40,115 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:40,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:40,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:34:40,336 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:34:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:40,336 INFO L85 PathProgramCache]: Analyzing trace with hash -389301684, now seen corresponding path program 7 times [2021-11-20 07:34:40,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:40,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453285154] [2021-11-20 07:34:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:40,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:40,349 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:34:40,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536212315] [2021-11-20 07:34:40,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:34:40,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:40,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:40,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:40,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:34:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:40,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 07:34:40,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:40,772 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 23 treesize of output 19 [2021-11-20 07:34:40,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:34:40,866 INFO L354 Elim1Store]: treesize reduction 118, result has 20.8 percent of original size [2021-11-20 07:34:40,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 94 [2021-11-20 07:34:40,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:34:40,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:40,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 30 [2021-11-20 07:34:41,041 INFO L354 Elim1Store]: treesize reduction 162, result has 16.9 percent of original size [2021-11-20 07:34:41,042 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 5 case distinctions, treesize of input 77 treesize of output 97 [2021-11-20 07:34:41,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-11-20 07:34:41,226 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-20 07:34:41,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-20 07:34:41,551 INFO L354 Elim1Store]: treesize reduction 651, result has 11.5 percent of original size [2021-11-20 07:34:41,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 116 treesize of output 155 [2021-11-20 07:34:41,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 67 [2021-11-20 07:34:41,885 INFO L354 Elim1Store]: treesize reduction 655, result has 11.0 percent of original size [2021-11-20 07:34:41,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 116 treesize of output 151 [2021-11-20 07:34:41,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:34:41,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:41,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 65 [2021-11-20 07:34:42,267 INFO L354 Elim1Store]: treesize reduction 649, result has 11.8 percent of original size [2021-11-20 07:34:42,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 116 treesize of output 157 [2021-11-20 07:34:42,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:34:42,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:34:42,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 65 [2021-11-20 07:34:42,556 INFO L354 Elim1Store]: treesize reduction 144, result has 15.3 percent of original size [2021-11-20 07:34:42,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 49 [2021-11-20 07:34:42,868 INFO L354 Elim1Store]: treesize reduction 637, result has 11.0 percent of original size [2021-11-20 07:34:42,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 112 treesize of output 145 [2021-11-20 07:34:42,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:42,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 59 [2021-11-20 07:34:43,269 INFO L354 Elim1Store]: treesize reduction 639, result has 10.8 percent of original size [2021-11-20 07:34:43,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 112 treesize of output 143 [2021-11-20 07:34:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 52 [2021-11-20 07:34:43,673 INFO L354 Elim1Store]: treesize reduction 695, result has 12.5 percent of original size [2021-11-20 07:34:43,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 120 treesize of output 167 [2021-11-20 07:34:43,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:34:43,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:43,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 60 [2021-11-20 07:34:43,923 INFO L354 Elim1Store]: treesize reduction 144, result has 15.3 percent of original size [2021-11-20 07:34:43,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 49 [2021-11-20 07:34:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:44,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:59,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:34:59,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 121 [2021-11-20 07:34:59,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-11-20 07:34:59,898 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 21 treesize of output 10 [2021-11-20 07:34:59,970 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 113 treesize of output 107 [2021-11-20 07:35:00,042 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-11-20 07:35:00,042 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 576 treesize of output 567 [2021-11-20 07:35:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:01,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453285154] [2021-11-20 07:35:01,696 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:35:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536212315] [2021-11-20 07:35:01,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536212315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:01,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:35:01,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2021-11-20 07:35:01,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575118022] [2021-11-20 07:35:01,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:01,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 07:35:01,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:01,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 07:35:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1822, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 07:35:01,701 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 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 07:35:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:41,539 INFO L93 Difference]: Finished difference Result 219 states and 238 transitions. [2021-11-20 07:35:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 07:35:41,540 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 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 38 [2021-11-20 07:35:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:41,542 INFO L225 Difference]: With dead ends: 219 [2021-11-20 07:35:41,543 INFO L226 Difference]: Without dead ends: 217 [2021-11-20 07:35:41,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=1071, Invalid=3351, Unknown=0, NotChecked=0, Total=4422 [2021-11-20 07:35:41,546 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 688 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:41,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 445 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 23.5s Time] [2021-11-20 07:35:41,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-20 07:35:41,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 138. [2021-11-20 07:35:41,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.1313868613138687) internal successors, (155), 137 states have internal predecessors, (155), 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 07:35:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 155 transitions. [2021-11-20 07:35:41,565 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 155 transitions. Word has length 38 [2021-11-20 07:35:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:41,566 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 155 transitions. [2021-11-20 07:35:41,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 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 07:35:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 155 transitions. [2021-11-20 07:35:41,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 07:35:41,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:41,568 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:41,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:41,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 07:35:41,782 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:35:41,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:41,783 INFO L85 PathProgramCache]: Analyzing trace with hash -441278722, now seen corresponding path program 3 times [2021-11-20 07:35:41,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:41,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019433547] [2021-11-20 07:35:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:41,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:41,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:35:41,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061647285] [2021-11-20 07:35:41,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:35:41,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:41,797 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:41,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:35:42,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 07:35:42,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:42,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 07:35:42,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:42,238 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 23 treesize of output 19 [2021-11-20 07:35:42,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:35:42,326 INFO L354 Elim1Store]: treesize reduction 118, result has 20.8 percent of original size [2021-11-20 07:35:42,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 94 [2021-11-20 07:35:42,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:35:42,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:42,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 15 [2021-11-20 07:35:42,581 INFO L354 Elim1Store]: treesize reduction 260, result has 19.0 percent of original size [2021-11-20 07:35:42,581 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 5 case distinctions, treesize of input 101 treesize of output 135 [2021-11-20 07:35:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:42,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:42,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:42,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 40 [2021-11-20 07:35:42,983 INFO L354 Elim1Store]: treesize reduction 502, result has 11.8 percent of original size [2021-11-20 07:35:42,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 107 treesize of output 134 [2021-11-20 07:35:43,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 42 [2021-11-20 07:35:43,243 INFO L354 Elim1Store]: treesize reduction 506, result has 11.1 percent of original size [2021-11-20 07:35:43,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 107 treesize of output 130 [2021-11-20 07:35:43,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 42 [2021-11-20 07:35:43,550 INFO L354 Elim1Store]: treesize reduction 560, result has 12.6 percent of original size [2021-11-20 07:35:43,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 121 treesize of output 156 [2021-11-20 07:35:43,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:35:43,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 57 [2021-11-20 07:35:43,927 INFO L354 Elim1Store]: treesize reduction 482, result has 12.8 percent of original size [2021-11-20 07:35:43,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 103 treesize of output 134 [2021-11-20 07:35:43,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:35:43,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:43,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 60 [2021-11-20 07:35:44,226 INFO L354 Elim1Store]: treesize reduction 490, result has 11.4 percent of original size [2021-11-20 07:35:44,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 103 treesize of output 126 [2021-11-20 07:35:44,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 45 [2021-11-20 07:35:44,608 INFO L354 Elim1Store]: treesize reduction 451, result has 18.4 percent of original size [2021-11-20 07:35:44,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 103 treesize of output 165 [2021-11-20 07:35:44,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:35:44,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:44,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 45 [2021-11-20 07:35:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:35:45,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 48 [2021-11-20 07:35:45,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:35:45,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 41 [2021-11-20 07:35:45,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,281 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-11-20 07:35:45,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 72 [2021-11-20 07:35:45,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:35:45,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:35:45,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 48 [2021-11-20 07:35:47,506 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-20 07:35:47,507 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 97 treesize of output 57 [2021-11-20 07:35:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:47,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:36:05,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:05,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019433547] [2021-11-20 07:36:05,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:36:05,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061647285] [2021-11-20 07:36:05,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061647285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:05,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:05,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 57 [2021-11-20 07:36:05,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930249775] [2021-11-20 07:36:05,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:05,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-20 07:36:05,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:05,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-20 07:36:05,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=2463, Unknown=3, NotChecked=0, Total=3192 [2021-11-20 07:36:05,390 INFO L87 Difference]: Start difference. First operand 138 states and 155 transitions. Second operand has 57 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 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 07:36:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:10,207 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2021-11-20 07:36:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 07:36:10,207 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 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 40 [2021-11-20 07:36:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:10,209 INFO L225 Difference]: With dead ends: 148 [2021-11-20 07:36:10,209 INFO L226 Difference]: Without dead ends: 119 [2021-11-20 07:36:10,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=918, Invalid=3369, Unknown=3, NotChecked=0, Total=4290 [2021-11-20 07:36:10,212 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:10,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 188 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 266 Invalid, 0 Unknown, 192 Unchecked, 1.1s Time] [2021-11-20 07:36:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-20 07:36:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-11-20 07:36:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 110 states have internal predecessors, (127), 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 07:36:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2021-11-20 07:36:10,231 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 40 [2021-11-20 07:36:10,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:10,231 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2021-11-20 07:36:10,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 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 07:36:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2021-11-20 07:36:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:36:10,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:10,233 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:10,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:10,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:10,435 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:36:10,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:10,436 INFO L85 PathProgramCache]: Analyzing trace with hash -197809856, now seen corresponding path program 4 times [2021-11-20 07:36:10,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:10,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934188269] [2021-11-20 07:36:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:10,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:10,447 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:36:10,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957101439] [2021-11-20 07:36:10,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:36:10,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:10,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:10,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:10,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:36:10,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:36:10,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:10,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:36:10,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:36:10,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:36:10,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934188269] [2021-11-20 07:36:10,974 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:36:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957101439] [2021-11-20 07:36:10,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957101439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:10,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:10,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-20 07:36:10,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448755118] [2021-11-20 07:36:10,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:10,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:36:10,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:10,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:36:10,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:36:10,977 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 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 07:36:11,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:11,379 INFO L93 Difference]: Finished difference Result 242 states and 270 transitions. [2021-11-20 07:36:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:36:11,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 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 44 [2021-11-20 07:36:11,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:11,383 INFO L225 Difference]: With dead ends: 242 [2021-11-20 07:36:11,383 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 07:36:11,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:36:11,385 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 158 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:11,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 114 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:36:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 07:36:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 155. [2021-11-20 07:36:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.12987012987013) internal successors, (174), 154 states have internal predecessors, (174), 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 07:36:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2021-11-20 07:36:11,416 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 44 [2021-11-20 07:36:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:11,417 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2021-11-20 07:36:11,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 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 07:36:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2021-11-20 07:36:11,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:36:11,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:11,418 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:11,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:11,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:36:11,632 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:36:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash 276666816, now seen corresponding path program 5 times [2021-11-20 07:36:11,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:11,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64833001] [2021-11-20 07:36:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:11,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:11,644 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:36:11,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439088006] [2021-11-20 07:36:11,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:36:11,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:11,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:11,648 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:11,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a3b5af7-e303-4d0b-82b5-0f16a0bab10c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process