./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt --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 ac430eaa5f6b4fef781eabca2fa59ab829e38729 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:18:37,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:18:37,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:18:37,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:18:37,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:18:37,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:18:37,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:18:37,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:18:37,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:18:37,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:18:37,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:18:37,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:18:37,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:18:37,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:18:37,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:18:37,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:18:37,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:18:37,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:18:37,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:18:37,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:18:37,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:18:37,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:18:37,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:18:37,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:18:37,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:18:37,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:18:37,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:18:37,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:18:37,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:18:37,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:18:37,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:18:37,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:18:37,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:18:37,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:18:37,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:18:37,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:18:37,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:18:37,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:18:37,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:18:37,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:18:37,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:18:37,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:18:37,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:18:37,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:18:37,295 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:18:37,295 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:18:37,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:18:37,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:18:37,304 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:18:37,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:18:37,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:18:37,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:18:37,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:18:37,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:18:37,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:18:37,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:18:37,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:18:37,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:18:37,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:18:37,307 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:18:37,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:18:37,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:18:37,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:18:37,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:18:37,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:18:37,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:18:37,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:18:37,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:18:37,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:18:37,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:18:37,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:18:37,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:18:37,308 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_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac430eaa5f6b4fef781eabca2fa59ab829e38729 [2021-10-13 00:18:37,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:18:37,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:18:37,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:18:37,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:18:37,664 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:18:37,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-13 00:18:37,767 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/data/acb12ac88/17b04d3461ce4b05b4317af3828aac3e/FLAG57c6d706b [2021-10-13 00:18:38,269 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:18:38,270 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-13 00:18:38,281 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/data/acb12ac88/17b04d3461ce4b05b4317af3828aac3e/FLAG57c6d706b [2021-10-13 00:18:38,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/data/acb12ac88/17b04d3461ce4b05b4317af3828aac3e [2021-10-13 00:18:38,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:18:38,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:18:38,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:18:38,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:18:38,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:18:38,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:38,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed3c831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38, skipping insertion in model container [2021-10-13 00:18:38,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:38,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:18:38,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:18:38,831 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-13 00:18:38,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:18:38,869 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:18:38,885 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-13 00:18:38,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:18:38,910 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:18:38,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38 WrapperNode [2021-10-13 00:18:38,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:18:38,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:18:38,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:18:38,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:18:38,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:38,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:38,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:18:38,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:18:38,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:18:38,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:18:38,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:38,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:38,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:38,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:38,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:38,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:38,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:38,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:18:39,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:18:39,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:18:39,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:18:39,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38" (1/1) ... [2021-10-13 00:18:39,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:18:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:39,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:18:39,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:18:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:18:39,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:18:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:18:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:18:39,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:18:39,314 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 00:18:39,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:18:39 BoogieIcfgContainer [2021-10-13 00:18:39,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:18:39,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:18:39,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:18:39,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:18:39,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:18:38" (1/3) ... [2021-10-13 00:18:39,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b60b885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:18:39, skipping insertion in model container [2021-10-13 00:18:39,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:18:38" (2/3) ... [2021-10-13 00:18:39,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b60b885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:18:39, skipping insertion in model container [2021-10-13 00:18:39,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:18:39" (3/3) ... [2021-10-13 00:18:39,340 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2021-10-13 00:18:39,345 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:18:39,345 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:18:39,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:18:39,441 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-13 00:18:39,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:18:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 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) [2021-10-13 00:18:39,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:18:39,485 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:39,485 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:39,486 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:39,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash 684167869, now seen corresponding path program 1 times [2021-10-13 00:18:39,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:39,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432711133] [2021-10-13 00:18:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:39,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:39,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:39,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432711133] [2021-10-13 00:18:39,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432711133] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:18:39,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:18:39,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:18:39,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500059456] [2021-10-13 00:18:39,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:18:39,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:39,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:18:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:18:39,821 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-10-13 00:18:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:39,863 INFO L93 Difference]: Finished difference Result 29 states and 49 transitions. [2021-10-13 00:18:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:18:39,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-10-13 00:18:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:39,874 INFO L225 Difference]: With dead ends: 29 [2021-10-13 00:18:39,874 INFO L226 Difference]: Without dead ends: 16 [2021-10-13 00:18:39,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:18:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-13 00:18:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-10-13 00:18:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2021-10-13 00:18:39,910 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2021-10-13 00:18:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:39,911 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-10-13 00:18:39,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-10-13 00:18:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2021-10-13 00:18:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:18:39,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:39,912 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:39,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:18:39,913 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash 68919620, now seen corresponding path program 1 times [2021-10-13 00:18:39,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:39,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609843682] [2021-10-13 00:18:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:39,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:39,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:39,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609843682] [2021-10-13 00:18:39,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609843682] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:39,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386589886] [2021-10-13 00:18:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:39,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:39,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:39,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:40,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:18:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:40,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:18:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:18:40,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386589886] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:18:40,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:18:40,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-13 00:18:40,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82614993] [2021-10-13 00:18:40,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:18:40,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:40,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:18:40,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:18:40,163 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-13 00:18:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:40,201 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-10-13 00:18:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:18:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2021-10-13 00:18:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:40,204 INFO L225 Difference]: With dead ends: 30 [2021-10-13 00:18:40,204 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 00:18:40,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:18:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 00:18:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2021-10-13 00:18:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:40,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-10-13 00:18:40,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 12 [2021-10-13 00:18:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:40,213 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-10-13 00:18:40,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-13 00:18:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-10-13 00:18:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:18:40,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:40,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:40,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:40,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:40,441 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:40,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:40,442 INFO L82 PathProgramCache]: Analyzing trace with hash 68979202, now seen corresponding path program 1 times [2021-10-13 00:18:40,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:40,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256546688] [2021-10-13 00:18:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:40,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:40,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:40,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256546688] [2021-10-13 00:18:40,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256546688] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:40,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040654270] [2021-10-13 00:18:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:40,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:40,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:40,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:40,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:18:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:40,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:18:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:40,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040654270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:40,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:40,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-13 00:18:40,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322207872] [2021-10-13 00:18:40,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:18:40,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:40,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:18:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:18:40,692 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:40,739 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-10-13 00:18:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:18:40,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 00:18:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:40,743 INFO L225 Difference]: With dead ends: 32 [2021-10-13 00:18:40,743 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 00:18:40,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:18:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 00:18:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-13 00:18:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2021-10-13 00:18:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-10-13 00:18:40,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2021-10-13 00:18:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:40,753 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-10-13 00:18:40,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-10-13 00:18:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:18:40,755 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:40,755 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:40,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:40,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:40,977 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:40,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2128812571, now seen corresponding path program 2 times [2021-10-13 00:18:40,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:40,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270293282] [2021-10-13 00:18:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:40,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:41,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:41,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270293282] [2021-10-13 00:18:41,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270293282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:41,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809767737] [2021-10-13 00:18:41,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:18:41,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:41,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:41,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:41,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:18:41,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:18:41,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:41,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:18:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:18:41,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809767737] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:41,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:41,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-13 00:18:41,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294857467] [2021-10-13 00:18:41,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:18:41,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:41,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:18:41,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:18:41,242 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-10-13 00:18:41,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:41,377 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-10-13 00:18:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:18:41,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) Word has length 15 [2021-10-13 00:18:41,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:41,379 INFO L225 Difference]: With dead ends: 59 [2021-10-13 00:18:41,379 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 00:18:41,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:18:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 00:18:41,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-10-13 00:18:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:41,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-10-13 00:18:41,387 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 15 [2021-10-13 00:18:41,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:41,387 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-10-13 00:18:41,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-10-13 00:18:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-10-13 00:18:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:18:41,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:41,389 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:41,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:41,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-13 00:18:41,617 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash 25548196, now seen corresponding path program 1 times [2021-10-13 00:18:41,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:41,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747161588] [2021-10-13 00:18:41,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:41,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:41,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:41,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747161588] [2021-10-13 00:18:41,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747161588] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:41,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568906432] [2021-10-13 00:18:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:41,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:41,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:41,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:41,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:18:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:41,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:18:41,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:41,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568906432] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:41,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:41,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-13 00:18:41,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705474722] [2021-10-13 00:18:41,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:18:41,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:18:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:18:41,868 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-10-13 00:18:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:41,932 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2021-10-13 00:18:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:18:41,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 00:18:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:41,937 INFO L225 Difference]: With dead ends: 94 [2021-10-13 00:18:41,937 INFO L226 Difference]: Without dead ends: 61 [2021-10-13 00:18:41,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:18:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-13 00:18:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2021-10-13 00:18:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 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) [2021-10-13 00:18:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2021-10-13 00:18:41,953 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 18 [2021-10-13 00:18:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:41,954 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2021-10-13 00:18:41,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2021-10-13 00:18:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2021-10-13 00:18:41,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:18:41,956 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:41,956 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:41,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:42,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:42,181 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:42,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2073833213, now seen corresponding path program 2 times [2021-10-13 00:18:42,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:42,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454272075] [2021-10-13 00:18:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:42,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:42,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:42,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454272075] [2021-10-13 00:18:42,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454272075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:42,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581428319] [2021-10-13 00:18:42,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:18:42,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:42,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:42,280 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:42,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:18:42,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:18:42,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:18:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 00:18:42,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581428319] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:18:42,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:18:42,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-10-13 00:18:42,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037604256] [2021-10-13 00:18:42,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:18:42,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:42,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:18:42,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:18:42,415 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:42,468 INFO L93 Difference]: Finished difference Result 119 states and 155 transitions. [2021-10-13 00:18:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:18:42,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 00:18:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:42,473 INFO L225 Difference]: With dead ends: 119 [2021-10-13 00:18:42,473 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 00:18:42,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:18:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 00:18:42,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2021-10-13 00:18:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 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) [2021-10-13 00:18:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2021-10-13 00:18:42,491 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 21 [2021-10-13 00:18:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:42,492 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2021-10-13 00:18:42,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2021-10-13 00:18:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:18:42,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:42,494 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:42,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-13 00:18:42,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:42,709 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:42,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:42,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1062715963, now seen corresponding path program 3 times [2021-10-13 00:18:42,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:42,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448491946] [2021-10-13 00:18:42,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:42,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:42,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:42,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448491946] [2021-10-13 00:18:42,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448491946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:42,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863140293] [2021-10-13 00:18:42,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:18:42,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:42,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:42,805 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:42,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:18:42,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:18:42,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:42,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:18:42,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 00:18:43,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863140293] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:18:43,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:18:43,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-10-13 00:18:43,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458073909] [2021-10-13 00:18:43,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:18:43,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:43,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:18:43,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:18:43,205 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:43,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:43,298 INFO L93 Difference]: Finished difference Result 161 states and 203 transitions. [2021-10-13 00:18:43,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:18:43,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 00:18:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:43,301 INFO L225 Difference]: With dead ends: 161 [2021-10-13 00:18:43,302 INFO L226 Difference]: Without dead ends: 159 [2021-10-13 00:18:43,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:18:43,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-13 00:18:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2021-10-13 00:18:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2621359223300972) internal successors, (130), 103 states have internal predecessors, (130), 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) [2021-10-13 00:18:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-10-13 00:18:43,317 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 21 [2021-10-13 00:18:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:43,317 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-10-13 00:18:43,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:43,318 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-10-13 00:18:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:18:43,319 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:43,319 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:43,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:43,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:43,533 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:43,533 INFO L82 PathProgramCache]: Analyzing trace with hash 483638269, now seen corresponding path program 1 times [2021-10-13 00:18:43,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:43,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110582269] [2021-10-13 00:18:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:43,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:43,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:43,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110582269] [2021-10-13 00:18:43,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110582269] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:43,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674543928] [2021-10-13 00:18:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:43,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:43,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:43,591 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:43,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:18:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:43,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:18:43,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:43,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674543928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:43,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:43,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-13 00:18:43,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149269890] [2021-10-13 00:18:43,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:18:43,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:18:43,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:18:43,736 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2021-10-13 00:18:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:43,789 INFO L93 Difference]: Finished difference Result 223 states and 281 transitions. [2021-10-13 00:18:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:18:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 00:18:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:43,791 INFO L225 Difference]: With dead ends: 223 [2021-10-13 00:18:43,791 INFO L226 Difference]: Without dead ends: 154 [2021-10-13 00:18:43,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:18:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-13 00:18:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2021-10-13 00:18:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.2419354838709677) internal successors, (154), 124 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2021-10-13 00:18:43,819 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 21 [2021-10-13 00:18:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:43,820 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2021-10-13 00:18:43,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2021-10-13 00:18:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2021-10-13 00:18:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:18:43,825 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:43,826 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:43,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:44,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:44,045 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:44,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2101787646, now seen corresponding path program 2 times [2021-10-13 00:18:44,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:44,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589728046] [2021-10-13 00:18:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:44,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:44,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:44,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589728046] [2021-10-13 00:18:44,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589728046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:44,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852421375] [2021-10-13 00:18:44,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:18:44,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:44,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:44,132 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:44,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 00:18:44,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:18:44,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:44,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:18:44,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 00:18:44,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852421375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:44,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:44,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-10-13 00:18:44,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280491854] [2021-10-13 00:18:44,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:18:44,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:44,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:18:44,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:18:44,300 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) [2021-10-13 00:18:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:44,439 INFO L93 Difference]: Finished difference Result 324 states and 408 transitions. [2021-10-13 00:18:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 00:18:44,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 00:18:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:44,442 INFO L225 Difference]: With dead ends: 324 [2021-10-13 00:18:44,442 INFO L226 Difference]: Without dead ends: 243 [2021-10-13 00:18:44,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:18:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-10-13 00:18:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 140. [2021-10-13 00:18:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.2374100719424461) internal successors, (172), 139 states have internal predecessors, (172), 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) [2021-10-13 00:18:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2021-10-13 00:18:44,454 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 24 [2021-10-13 00:18:44,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:44,454 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2021-10-13 00:18:44,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) [2021-10-13 00:18:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2021-10-13 00:18:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 00:18:44,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:44,455 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:44,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:44,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:44,677 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:44,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:44,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1847320295, now seen corresponding path program 3 times [2021-10-13 00:18:44,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:44,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623269876] [2021-10-13 00:18:44,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:44,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:44,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:44,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623269876] [2021-10-13 00:18:44,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623269876] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:44,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733789490] [2021-10-13 00:18:44,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:18:44,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:44,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:44,743 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:44,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 00:18:44,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 00:18:44,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:44,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:18:44,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-13 00:18:44,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733789490] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:18:44,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:18:44,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-10-13 00:18:44,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456232083] [2021-10-13 00:18:44,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:18:44,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:44,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:18:44,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:18:44,926 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-10-13 00:18:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:44,980 INFO L93 Difference]: Finished difference Result 265 states and 321 transitions. [2021-10-13 00:18:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:18:44,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 00:18:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:44,983 INFO L225 Difference]: With dead ends: 265 [2021-10-13 00:18:44,983 INFO L226 Difference]: Without dead ends: 185 [2021-10-13 00:18:44,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:18:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-13 00:18:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 146. [2021-10-13 00:18:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 145 states have internal predecessors, (178), 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) [2021-10-13 00:18:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 178 transitions. [2021-10-13 00:18:44,994 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 178 transitions. Word has length 27 [2021-10-13 00:18:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:44,994 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 178 transitions. [2021-10-13 00:18:44,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-10-13 00:18:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 178 transitions. [2021-10-13 00:18:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 00:18:44,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:44,995 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:45,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:45,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 00:18:45,221 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:45,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1668645725, now seen corresponding path program 4 times [2021-10-13 00:18:45,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:45,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736857546] [2021-10-13 00:18:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:45,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:45,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:45,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736857546] [2021-10-13 00:18:45,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736857546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:45,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916580048] [2021-10-13 00:18:45,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:18:45,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:45,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:45,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:45,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 00:18:45,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:18:45,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:45,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:18:45,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:45,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916580048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:45,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:45,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-13 00:18:45,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211488256] [2021-10-13 00:18:45,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:18:45,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:45,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:18:45,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:18:45,481 INFO L87 Difference]: Start difference. First operand 146 states and 178 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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) [2021-10-13 00:18:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:45,540 INFO L93 Difference]: Finished difference Result 325 states and 394 transitions. [2021-10-13 00:18:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:18:45,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 00:18:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:45,542 INFO L225 Difference]: With dead ends: 325 [2021-10-13 00:18:45,542 INFO L226 Difference]: Without dead ends: 231 [2021-10-13 00:18:45,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:18:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-10-13 00:18:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 167. [2021-10-13 00:18:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.216867469879518) internal successors, (202), 166 states have internal predecessors, (202), 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) [2021-10-13 00:18:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2021-10-13 00:18:45,556 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 27 [2021-10-13 00:18:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:45,556 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2021-10-13 00:18:45,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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) [2021-10-13 00:18:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2021-10-13 00:18:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 00:18:45,558 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:45,558 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:45,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:45,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:45,779 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:45,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:45,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1538147426, now seen corresponding path program 5 times [2021-10-13 00:18:45,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:45,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687708728] [2021-10-13 00:18:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:45,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:45,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:45,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687708728] [2021-10-13 00:18:45,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687708728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:45,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521287122] [2021-10-13 00:18:45,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:18:45,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:45,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:45,887 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:45,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 00:18:46,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-13 00:18:46,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:46,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 00:18:46,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:46,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521287122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:46,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:46,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-13 00:18:46,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950117502] [2021-10-13 00:18:46,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:18:46,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:18:46,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:18:46,121 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) [2021-10-13 00:18:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:46,206 INFO L93 Difference]: Finished difference Result 358 states and 432 transitions. [2021-10-13 00:18:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:18:46,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-13 00:18:46,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:46,209 INFO L225 Difference]: With dead ends: 358 [2021-10-13 00:18:46,209 INFO L226 Difference]: Without dead ends: 252 [2021-10-13 00:18:46,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:18:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-13 00:18:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 188. [2021-10-13 00:18:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.2085561497326203) internal successors, (226), 187 states have internal predecessors, (226), 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) [2021-10-13 00:18:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 226 transitions. [2021-10-13 00:18:46,229 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 226 transitions. Word has length 30 [2021-10-13 00:18:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:46,229 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 226 transitions. [2021-10-13 00:18:46,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) [2021-10-13 00:18:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 226 transitions. [2021-10-13 00:18:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 00:18:46,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:46,230 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:46,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:46,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-13 00:18:46,445 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:46,445 INFO L82 PathProgramCache]: Analyzing trace with hash 808724797, now seen corresponding path program 6 times [2021-10-13 00:18:46,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:46,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106960774] [2021-10-13 00:18:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:46,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:46,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:46,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106960774] [2021-10-13 00:18:46,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106960774] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:46,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851726020] [2021-10-13 00:18:46,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:18:46,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:46,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:46,544 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:46,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 00:18:46,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 00:18:46,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:46,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:18:46,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-13 00:18:47,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851726020] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:18:47,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:18:47,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-10-13 00:18:47,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718510483] [2021-10-13 00:18:47,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:18:47,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:18:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:18:47,007 INFO L87 Difference]: Start difference. First operand 188 states and 226 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2021-10-13 00:18:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:47,108 INFO L93 Difference]: Finished difference Result 270 states and 322 transitions. [2021-10-13 00:18:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:18:47,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 33 [2021-10-13 00:18:47,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:47,112 INFO L225 Difference]: With dead ends: 270 [2021-10-13 00:18:47,112 INFO L226 Difference]: Without dead ends: 268 [2021-10-13 00:18:47,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:18:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-13 00:18:47,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 188. [2021-10-13 00:18:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.2085561497326203) internal successors, (226), 187 states have internal predecessors, (226), 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) [2021-10-13 00:18:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 226 transitions. [2021-10-13 00:18:47,128 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 226 transitions. Word has length 33 [2021-10-13 00:18:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:47,128 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 226 transitions. [2021-10-13 00:18:47,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2021-10-13 00:18:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 226 transitions. [2021-10-13 00:18:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 00:18:47,130 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:47,131 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:47,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:47,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-13 00:18:47,354 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:47,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1165631, now seen corresponding path program 1 times [2021-10-13 00:18:47,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:47,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916286216] [2021-10-13 00:18:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:47,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-13 00:18:47,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:47,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916286216] [2021-10-13 00:18:47,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916286216] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:18:47,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:18:47,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:18:47,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126226297] [2021-10-13 00:18:47,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:18:47,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:47,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:18:47,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:18:47,395 INFO L87 Difference]: Start difference. First operand 188 states and 226 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-13 00:18:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:47,417 INFO L93 Difference]: Finished difference Result 307 states and 370 transitions. [2021-10-13 00:18:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:18:47,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 33 [2021-10-13 00:18:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:47,420 INFO L225 Difference]: With dead ends: 307 [2021-10-13 00:18:47,420 INFO L226 Difference]: Without dead ends: 200 [2021-10-13 00:18:47,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:18:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-13 00:18:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2021-10-13 00:18:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.2021857923497268) internal successors, (220), 183 states have internal predecessors, (220), 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) [2021-10-13 00:18:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2021-10-13 00:18:47,436 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 33 [2021-10-13 00:18:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:47,436 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2021-10-13 00:18:47,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-13 00:18:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2021-10-13 00:18:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-13 00:18:47,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:47,438 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 00:18:47,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-13 00:18:47,439 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1043308475, now seen corresponding path program 1 times [2021-10-13 00:18:47,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:47,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449779727] [2021-10-13 00:18:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:47,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-10-13 00:18:47,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:47,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449779727] [2021-10-13 00:18:47,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449779727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:47,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555297040] [2021-10-13 00:18:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:47,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:47,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:47,568 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:47,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 00:18:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:18:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-10-13 00:18:47,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555297040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:47,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:47,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-13 00:18:47,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701747640] [2021-10-13 00:18:47,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:18:47,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:47,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:18:47,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:18:47,904 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 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) [2021-10-13 00:18:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:47,984 INFO L93 Difference]: Finished difference Result 383 states and 458 transitions. [2021-10-13 00:18:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:18:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 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 63 [2021-10-13 00:18:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:47,987 INFO L225 Difference]: With dead ends: 383 [2021-10-13 00:18:47,987 INFO L226 Difference]: Without dead ends: 269 [2021-10-13 00:18:47,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:18:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-10-13 00:18:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2021-10-13 00:18:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.196078431372549) internal successors, (244), 204 states have internal predecessors, (244), 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) [2021-10-13 00:18:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 244 transitions. [2021-10-13 00:18:48,006 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 244 transitions. Word has length 63 [2021-10-13 00:18:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:48,007 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 244 transitions. [2021-10-13 00:18:48,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 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) [2021-10-13 00:18:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 244 transitions. [2021-10-13 00:18:48,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-13 00:18:48,008 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:48,008 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 00:18:48,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:48,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:48,225 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -305796463, now seen corresponding path program 2 times [2021-10-13 00:18:48,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:48,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816652681] [2021-10-13 00:18:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:48,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 263 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-13 00:18:48,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:48,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816652681] [2021-10-13 00:18:48,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816652681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:48,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989379012] [2021-10-13 00:18:48,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:18:48,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:48,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:48,325 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:48,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 00:18:48,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:18:48,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:48,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:18:48,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 263 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-13 00:18:48,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989379012] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:48,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:48,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-13 00:18:48,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396229363] [2021-10-13 00:18:48,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:18:48,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:18:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:18:48,714 INFO L87 Difference]: Start difference. First operand 205 states and 244 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-10-13 00:18:48,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:48,800 INFO L93 Difference]: Finished difference Result 416 states and 496 transitions. [2021-10-13 00:18:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:18:48,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 69 [2021-10-13 00:18:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:48,803 INFO L225 Difference]: With dead ends: 416 [2021-10-13 00:18:48,803 INFO L226 Difference]: Without dead ends: 290 [2021-10-13 00:18:48,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:18:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-10-13 00:18:48,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-10-13 00:18:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.191111111111111) internal successors, (268), 225 states have internal predecessors, (268), 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) [2021-10-13 00:18:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 268 transitions. [2021-10-13 00:18:48,821 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 268 transitions. Word has length 69 [2021-10-13 00:18:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:48,821 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 268 transitions. [2021-10-13 00:18:48,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-10-13 00:18:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 268 transitions. [2021-10-13 00:18:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-13 00:18:48,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:48,823 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 00:18:48,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:49,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:49,037 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:49,037 INFO L82 PathProgramCache]: Analyzing trace with hash 721559429, now seen corresponding path program 3 times [2021-10-13 00:18:49,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:49,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878220747] [2021-10-13 00:18:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:49,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 322 proven. 145 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-13 00:18:49,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:49,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878220747] [2021-10-13 00:18:49,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878220747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:49,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692212642] [2021-10-13 00:18:49,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:18:49,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:49,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:49,154 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:49,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 00:18:49,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:18:49,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:49,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 00:18:49,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 28 proven. 326 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-10-13 00:18:49,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692212642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:49,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:49,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-10-13 00:18:49,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121992796] [2021-10-13 00:18:49,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 00:18:49,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:49,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:18:49,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:18:49,913 INFO L87 Difference]: Start difference. First operand 226 states and 268 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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) [2021-10-13 00:18:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:50,673 INFO L93 Difference]: Finished difference Result 847 states and 1009 transitions. [2021-10-13 00:18:50,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 00:18:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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 75 [2021-10-13 00:18:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:50,678 INFO L225 Difference]: With dead ends: 847 [2021-10-13 00:18:50,678 INFO L226 Difference]: Without dead ends: 709 [2021-10-13 00:18:50,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=585, Invalid=2277, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 00:18:50,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-10-13 00:18:50,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 398. [2021-10-13 00:18:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.1914357682619647) internal successors, (473), 397 states have internal predecessors, (473), 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) [2021-10-13 00:18:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 473 transitions. [2021-10-13 00:18:50,733 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 473 transitions. Word has length 75 [2021-10-13 00:18:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:50,733 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 473 transitions. [2021-10-13 00:18:50,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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) [2021-10-13 00:18:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 473 transitions. [2021-10-13 00:18:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-13 00:18:50,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:50,735 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:50,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:50,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 00:18:50,953 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1200974189, now seen corresponding path program 1 times [2021-10-13 00:18:50,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:50,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9463210] [2021-10-13 00:18:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:50,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 390 proven. 176 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-13 00:18:51,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:51,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9463210] [2021-10-13 00:18:51,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9463210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:51,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106979659] [2021-10-13 00:18:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:51,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:51,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:51,090 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:51,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 00:18:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 00:18:51,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-13 00:18:51,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106979659] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:51,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:51,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-13 00:18:51,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158427458] [2021-10-13 00:18:51,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 00:18:51,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:51,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 00:18:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:18:51,538 INFO L87 Difference]: Start difference. First operand 398 states and 473 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 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) [2021-10-13 00:18:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:51,636 INFO L93 Difference]: Finished difference Result 826 states and 978 transitions. [2021-10-13 00:18:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 00:18:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 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 81 [2021-10-13 00:18:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:51,640 INFO L225 Difference]: With dead ends: 826 [2021-10-13 00:18:51,640 INFO L226 Difference]: Without dead ends: 525 [2021-10-13 00:18:51,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:18:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-10-13 00:18:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 419. [2021-10-13 00:18:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.1889952153110048) internal successors, (497), 418 states have internal predecessors, (497), 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) [2021-10-13 00:18:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 497 transitions. [2021-10-13 00:18:51,683 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 497 transitions. Word has length 81 [2021-10-13 00:18:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:51,683 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 497 transitions. [2021-10-13 00:18:51,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 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) [2021-10-13 00:18:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 497 transitions. [2021-10-13 00:18:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-13 00:18:51,685 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:51,686 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:51,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:51,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 00:18:51,901 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:51,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:51,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1904992903, now seen corresponding path program 2 times [2021-10-13 00:18:51,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:51,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998687764] [2021-10-13 00:18:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:51,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-10-13 00:18:52,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:52,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998687764] [2021-10-13 00:18:52,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998687764] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:52,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011866531] [2021-10-13 00:18:52,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:18:52,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:52,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:52,035 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:52,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 00:18:52,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:18:52,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:52,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:18:52,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 5 proven. 183 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-10-13 00:18:52,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011866531] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:52,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:52,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 18 [2021-10-13 00:18:52,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511983139] [2021-10-13 00:18:52,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 00:18:52,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:52,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 00:18:52,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:18:52,539 INFO L87 Difference]: Start difference. First operand 419 states and 497 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 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) [2021-10-13 00:18:52,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:52,862 INFO L93 Difference]: Finished difference Result 1441 states and 1671 transitions. [2021-10-13 00:18:52,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 00:18:52,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 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 87 [2021-10-13 00:18:52,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:52,869 INFO L225 Difference]: With dead ends: 1441 [2021-10-13 00:18:52,869 INFO L226 Difference]: Without dead ends: 1128 [2021-10-13 00:18:52,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2021-10-13 00:18:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-10-13 00:18:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 443. [2021-10-13 00:18:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1900452488687783) internal successors, (526), 442 states have internal predecessors, (526), 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) [2021-10-13 00:18:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 526 transitions. [2021-10-13 00:18:52,941 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 526 transitions. Word has length 87 [2021-10-13 00:18:52,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:52,941 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 526 transitions. [2021-10-13 00:18:52,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 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) [2021-10-13 00:18:52,942 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 526 transitions. [2021-10-13 00:18:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-13 00:18:52,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:52,943 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:52,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:53,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:53,157 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash 900910931, now seen corresponding path program 3 times [2021-10-13 00:18:53,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:53,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838664226] [2021-10-13 00:18:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:53,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-10-13 00:18:53,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:53,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838664226] [2021-10-13 00:18:53,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838664226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:53,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994339483] [2021-10-13 00:18:53,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:18:53,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:53,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:53,309 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:53,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 00:18:53,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:18:53,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:18:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 37 proven. 539 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-10-13 00:18:54,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994339483] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:54,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:54,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2021-10-13 00:18:54,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986255400] [2021-10-13 00:18:54,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 00:18:54,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 00:18:54,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:18:54,254 INFO L87 Difference]: Start difference. First operand 443 states and 526 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:55,764 INFO L93 Difference]: Finished difference Result 1399 states and 1602 transitions. [2021-10-13 00:18:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-10-13 00:18:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-10-13 00:18:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:55,770 INFO L225 Difference]: With dead ends: 1399 [2021-10-13 00:18:55,771 INFO L226 Difference]: Without dead ends: 1068 [2021-10-13 00:18:55,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 1131.3ms TimeCoverageRelationStatistics Valid=1260, Invalid=5220, Unknown=0, NotChecked=0, Total=6480 [2021-10-13 00:18:55,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-13 00:18:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 488. [2021-10-13 00:18:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.1868583162217659) internal successors, (578), 487 states have internal predecessors, (578), 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) [2021-10-13 00:18:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 578 transitions. [2021-10-13 00:18:55,839 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 578 transitions. Word has length 93 [2021-10-13 00:18:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:55,840 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 578 transitions. [2021-10-13 00:18:55,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 578 transitions. [2021-10-13 00:18:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-13 00:18:55,842 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:55,842 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:55,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:56,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:56,066 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:56,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1378183737, now seen corresponding path program 4 times [2021-10-13 00:18:56,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:56,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465998564] [2021-10-13 00:18:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:56,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 621 proven. 287 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-13 00:18:56,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:56,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465998564] [2021-10-13 00:18:56,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465998564] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:56,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653450123] [2021-10-13 00:18:56,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:18:56,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:56,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:56,227 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:56,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 00:18:56,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:18:56,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:56,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:18:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 881 proven. 55 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-13 00:18:57,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653450123] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:57,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:57,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-10-13 00:18:57,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636351122] [2021-10-13 00:18:57,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 00:18:57,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 00:18:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 00:18:57,046 INFO L87 Difference]: Start difference. First operand 488 states and 578 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 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) [2021-10-13 00:18:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:57,983 INFO L93 Difference]: Finished difference Result 1518 states and 1756 transitions. [2021-10-13 00:18:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 00:18:57,984 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 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 99 [2021-10-13 00:18:57,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:57,990 INFO L225 Difference]: With dead ends: 1518 [2021-10-13 00:18:57,991 INFO L226 Difference]: Without dead ends: 1151 [2021-10-13 00:18:57,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 567.0ms TimeCoverageRelationStatistics Valid=847, Invalid=3059, Unknown=0, NotChecked=0, Total=3906 [2021-10-13 00:18:57,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-10-13 00:18:58,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 749. [2021-10-13 00:18:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.1470588235294117) internal successors, (858), 748 states have internal predecessors, (858), 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) [2021-10-13 00:18:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 858 transitions. [2021-10-13 00:18:58,098 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 858 transitions. Word has length 99 [2021-10-13 00:18:58,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:58,098 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 858 transitions. [2021-10-13 00:18:58,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 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) [2021-10-13 00:18:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 858 transitions. [2021-10-13 00:18:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-13 00:18:58,100 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:58,101 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 28, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:58,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:58,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:58,324 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash 198529999, now seen corresponding path program 5 times [2021-10-13 00:18:58,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:58,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150174516] [2021-10-13 00:18:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:58,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-10-13 00:18:58,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:58,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150174516] [2021-10-13 00:18:58,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150174516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:58,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761592640] [2021-10-13 00:18:58,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:18:58,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:58,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:58,549 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:58,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 00:18:59,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-10-13 00:18:59,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:59,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:18:59,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-10-13 00:18:59,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761592640] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:59,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:59,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-13 00:18:59,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047226356] [2021-10-13 00:18:59,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 00:18:59,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 00:18:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:18:59,252 INFO L87 Difference]: Start difference. First operand 749 states and 858 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 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) [2021-10-13 00:18:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:59,544 INFO L93 Difference]: Finished difference Result 1843 states and 2077 transitions. [2021-10-13 00:18:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 00:18:59,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 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 105 [2021-10-13 00:18:59,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:59,550 INFO L225 Difference]: With dead ends: 1843 [2021-10-13 00:18:59,551 INFO L226 Difference]: Without dead ends: 1229 [2021-10-13 00:18:59,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:18:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-10-13 00:18:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 800. [2021-10-13 00:18:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.1476846057571966) internal successors, (917), 799 states have internal predecessors, (917), 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) [2021-10-13 00:18:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 917 transitions. [2021-10-13 00:18:59,674 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 917 transitions. Word has length 105 [2021-10-13 00:18:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:59,674 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 917 transitions. [2021-10-13 00:18:59,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 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) [2021-10-13 00:18:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 917 transitions. [2021-10-13 00:18:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-13 00:18:59,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:59,676 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 30, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:59,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:59,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:59,905 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:59,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash 21201355, now seen corresponding path program 6 times [2021-10-13 00:18:59,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:59,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631949580] [2021-10-13 00:18:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:59,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 802 proven. 376 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-10-13 00:19:00,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:00,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631949580] [2021-10-13 00:19:00,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631949580] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:00,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714137640] [2021-10-13 00:19:00,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:19:00,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:00,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:00,109 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:00,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 00:19:00,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 00:19:00,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:00,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 00:19:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 46 proven. 806 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-10-13 00:19:01,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714137640] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:01,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:01,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2021-10-13 00:19:01,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872498720] [2021-10-13 00:19:01,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 00:19:01,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:01,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 00:19:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-10-13 00:19:01,480 INFO L87 Difference]: Start difference. First operand 800 states and 917 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 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) [2021-10-13 00:19:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:02,701 INFO L93 Difference]: Finished difference Result 2088 states and 2365 transitions. [2021-10-13 00:19:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-13 00:19:02,701 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 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 111 [2021-10-13 00:19:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:02,708 INFO L225 Difference]: With dead ends: 2088 [2021-10-13 00:19:02,708 INFO L226 Difference]: Without dead ends: 1435 [2021-10-13 00:19:02,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 911.5ms TimeCoverageRelationStatistics Valid=1248, Invalid=4758, Unknown=0, NotChecked=0, Total=6006 [2021-10-13 00:19:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-10-13 00:19:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 916. [2021-10-13 00:19:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.146448087431694) internal successors, (1049), 915 states have internal predecessors, (1049), 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) [2021-10-13 00:19:02,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1049 transitions. [2021-10-13 00:19:02,829 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1049 transitions. Word has length 111 [2021-10-13 00:19:02,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:02,829 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1049 transitions. [2021-10-13 00:19:02,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 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) [2021-10-13 00:19:02,829 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1049 transitions. [2021-10-13 00:19:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-13 00:19:02,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:02,832 INFO L512 BasicCegarLoop]: trace histogram [35, 35, 33, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 00:19:02,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:03,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-13 00:19:03,045 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:03,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1574829550, now seen corresponding path program 1 times [2021-10-13 00:19:03,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:03,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995972091] [2021-10-13 00:19:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:03,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 955 proven. 425 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-10-13 00:19:03,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:03,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995972091] [2021-10-13 00:19:03,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995972091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:03,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103347633] [2021-10-13 00:19:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:03,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:03,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:03,263 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:03,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 00:19:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:03,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:19:03,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 955 proven. 425 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-10-13 00:19:03,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103347633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:03,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:03,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-13 00:19:03,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164598198] [2021-10-13 00:19:03,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 00:19:03,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 00:19:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:19:03,970 INFO L87 Difference]: Start difference. First operand 916 states and 1049 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:04,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:04,250 INFO L93 Difference]: Finished difference Result 2152 states and 2433 transitions. [2021-10-13 00:19:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 00:19:04,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-10-13 00:19:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:04,256 INFO L225 Difference]: With dead ends: 2152 [2021-10-13 00:19:04,257 INFO L226 Difference]: Without dead ends: 1395 [2021-10-13 00:19:04,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:19:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-10-13 00:19:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 964. [2021-10-13 00:19:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 1.1474558670820354) internal successors, (1105), 963 states have internal predecessors, (1105), 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) [2021-10-13 00:19:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1105 transitions. [2021-10-13 00:19:04,397 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1105 transitions. Word has length 120 [2021-10-13 00:19:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:04,397 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1105 transitions. [2021-10-13 00:19:04,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1105 transitions. [2021-10-13 00:19:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-13 00:19:04,400 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:04,400 INFO L512 BasicCegarLoop]: trace histogram [36, 36, 34, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 00:19:04,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:04,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:04,617 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1504583927, now seen corresponding path program 2 times [2021-10-13 00:19:04,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:04,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911882805] [2021-10-13 00:19:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:04,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 1010 proven. 477 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-10-13 00:19:04,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:04,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911882805] [2021-10-13 00:19:04,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911882805] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:04,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096885267] [2021-10-13 00:19:04,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:19:04,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:04,826 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:04,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 00:19:05,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:19:05,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:05,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 00:19:05,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 5 proven. 1449 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-10-13 00:19:05,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096885267] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:05,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:05,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 24 [2021-10-13 00:19:05,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653412022] [2021-10-13 00:19:05,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 00:19:05,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:05,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 00:19:05,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:19:05,713 INFO L87 Difference]: Start difference. First operand 964 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 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) [2021-10-13 00:19:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:06,456 INFO L93 Difference]: Finished difference Result 2496 states and 2861 transitions. [2021-10-13 00:19:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 00:19:06,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 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 123 [2021-10-13 00:19:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:06,466 INFO L225 Difference]: With dead ends: 2496 [2021-10-13 00:19:06,466 INFO L226 Difference]: Without dead ends: 1703 [2021-10-13 00:19:06,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=655, Invalid=1151, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 00:19:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-10-13 00:19:06,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1287. [2021-10-13 00:19:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 1.1632970451010887) internal successors, (1496), 1286 states have internal predecessors, (1496), 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) [2021-10-13 00:19:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1496 transitions. [2021-10-13 00:19:06,629 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1496 transitions. Word has length 123 [2021-10-13 00:19:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:06,630 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 1496 transitions. [2021-10-13 00:19:06,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 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) [2021-10-13 00:19:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1496 transitions. [2021-10-13 00:19:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-13 00:19:06,633 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:06,633 INFO L512 BasicCegarLoop]: trace histogram [38, 38, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 00:19:06,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:06,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 00:19:06,849 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash -645031407, now seen corresponding path program 3 times [2021-10-13 00:19:06,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:06,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741171480] [2021-10-13 00:19:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:06,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 1123 proven. 532 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2021-10-13 00:19:07,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:07,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741171480] [2021-10-13 00:19:07,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741171480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:07,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446289742] [2021-10-13 00:19:07,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:19:07,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:07,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:07,092 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:07,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 00:19:07,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 00:19:07,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:07,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 00:19:07,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 0 proven. 1127 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2021-10-13 00:19:08,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446289742] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:08,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:08,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2021-10-13 00:19:08,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75928968] [2021-10-13 00:19:08,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 00:19:08,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:08,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 00:19:08,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-10-13 00:19:08,718 INFO L87 Difference]: Start difference. First operand 1287 states and 1496 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 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) [2021-10-13 00:19:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:10,841 INFO L93 Difference]: Finished difference Result 2996 states and 3458 transitions. [2021-10-13 00:19:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-10-13 00:19:10,841 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 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 129 [2021-10-13 00:19:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:10,849 INFO L225 Difference]: With dead ends: 2996 [2021-10-13 00:19:10,849 INFO L226 Difference]: Without dead ends: 1896 [2021-10-13 00:19:10,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 1729.0ms TimeCoverageRelationStatistics Valid=1914, Invalid=6458, Unknown=0, NotChecked=0, Total=8372 [2021-10-13 00:19:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-10-13 00:19:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1354. [2021-10-13 00:19:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 1.1574279379157428) internal successors, (1566), 1353 states have internal predecessors, (1566), 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) [2021-10-13 00:19:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1566 transitions. [2021-10-13 00:19:11,028 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1566 transitions. Word has length 129 [2021-10-13 00:19:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:11,028 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 1566 transitions. [2021-10-13 00:19:11,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 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) [2021-10-13 00:19:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1566 transitions. [2021-10-13 00:19:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-10-13 00:19:11,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:11,034 INFO L512 BasicCegarLoop]: trace histogram [60, 60, 57, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-10-13 00:19:11,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:11,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 00:19:11,249 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:11,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1150791729, now seen corresponding path program 4 times [2021-10-13 00:19:11,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:11,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721855864] [2021-10-13 00:19:11,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:11,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5508 backedges. 2484 proven. 590 refuted. 0 times theorem prover too weak. 2434 trivial. 0 not checked. [2021-10-13 00:19:11,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:11,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721855864] [2021-10-13 00:19:11,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721855864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:11,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804522567] [2021-10-13 00:19:11,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:19:11,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:11,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:11,548 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:11,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 00:19:12,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:19:12,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:12,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 00:19:12,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5508 backedges. 2484 proven. 590 refuted. 0 times theorem prover too weak. 2434 trivial. 0 not checked. [2021-10-13 00:19:12,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804522567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:12,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:12,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-13 00:19:12,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691402368] [2021-10-13 00:19:12,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 00:19:12,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:12,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 00:19:12,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:19:12,788 INFO L87 Difference]: Start difference. First operand 1354 states and 1566 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 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) [2021-10-13 00:19:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:13,196 INFO L93 Difference]: Finished difference Result 3003 states and 3452 transitions. [2021-10-13 00:19:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:19:13,197 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 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 201 [2021-10-13 00:19:13,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:13,204 INFO L225 Difference]: With dead ends: 3003 [2021-10-13 00:19:13,204 INFO L226 Difference]: Without dead ends: 1849 [2021-10-13 00:19:13,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:19:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-10-13 00:19:13,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1426. [2021-10-13 00:19:13,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 1.1578947368421053) internal successors, (1650), 1425 states have internal predecessors, (1650), 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) [2021-10-13 00:19:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 1650 transitions. [2021-10-13 00:19:13,360 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 1650 transitions. Word has length 201 [2021-10-13 00:19:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:13,360 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 1650 transitions. [2021-10-13 00:19:13,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 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) [2021-10-13 00:19:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 1650 transitions. [2021-10-13 00:19:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-10-13 00:19:13,364 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:13,364 INFO L512 BasicCegarLoop]: trace histogram [63, 63, 60, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-10-13 00:19:13,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-13 00:19:13,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 00:19:13,581 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash -335372444, now seen corresponding path program 5 times [2021-10-13 00:19:13,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:13,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36718953] [2021-10-13 00:19:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:13,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6066 backedges. 2734 proven. 651 refuted. 0 times theorem prover too weak. 2681 trivial. 0 not checked. [2021-10-13 00:19:13,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:13,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36718953] [2021-10-13 00:19:13,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36718953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:13,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109877129] [2021-10-13 00:19:13,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:19:13,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:13,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:13,889 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:13,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 00:19:14,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-10-13 00:19:14,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 00:19:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6066 backedges. 2868 proven. 610 refuted. 0 times theorem prover too weak. 2588 trivial. 0 not checked. [2021-10-13 00:19:15,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109877129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:15,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:15,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2021-10-13 00:19:15,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694675341] [2021-10-13 00:19:15,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-13 00:19:15,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-13 00:19:15,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 00:19:15,462 INFO L87 Difference]: Start difference. First operand 1426 states and 1650 transitions. Second operand has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 48 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:24,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:24,098 INFO L93 Difference]: Finished difference Result 8960 states and 10420 transitions. [2021-10-13 00:19:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 343 states. [2021-10-13 00:19:24,099 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 48 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-10-13 00:19:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:24,127 INFO L225 Difference]: With dead ends: 8960 [2021-10-13 00:19:24,127 INFO L226 Difference]: Without dead ends: 7749 [2021-10-13 00:19:24,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59601 ImplicationChecksByTransitivity, 6808.3ms TimeCoverageRelationStatistics Valid=36106, Invalid=82574, Unknown=0, NotChecked=0, Total=118680 [2021-10-13 00:19:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7749 states. [2021-10-13 00:19:25,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7749 to 4912. [2021-10-13 00:19:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 4911 states have (on average 1.093463653023824) internal successors, (5370), 4911 states have internal predecessors, (5370), 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) [2021-10-13 00:19:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 5370 transitions. [2021-10-13 00:19:25,099 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 5370 transitions. Word has length 210 [2021-10-13 00:19:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:25,099 INFO L470 AbstractCegarLoop]: Abstraction has 4912 states and 5370 transitions. [2021-10-13 00:19:25,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 48 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:25,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 5370 transitions. [2021-10-13 00:19:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-10-13 00:19:25,111 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:25,112 INFO L512 BasicCegarLoop]: trace histogram [66, 66, 63, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-10-13 00:19:25,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-13 00:19:25,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 00:19:25,337 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:25,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:25,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1215260527, now seen corresponding path program 6 times [2021-10-13 00:19:25,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:25,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001118329] [2021-10-13 00:19:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:25,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6651 backedges. 2996 proven. 715 refuted. 0 times theorem prover too weak. 2940 trivial. 0 not checked. [2021-10-13 00:19:25,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:25,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001118329] [2021-10-13 00:19:25,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001118329] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:25,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710124555] [2021-10-13 00:19:25,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:19:25,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:25,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:25,634 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:25,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 00:19:26,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-13 00:19:26,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:26,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:19:26,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6651 backedges. 3068 proven. 1 refuted. 0 times theorem prover too weak. 3582 trivial. 0 not checked. [2021-10-13 00:19:26,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710124555] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:26,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:26,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2021-10-13 00:19:26,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891091693] [2021-10-13 00:19:26,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 00:19:26,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:26,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 00:19:26,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=613, Unknown=0, NotChecked=0, Total=930 [2021-10-13 00:19:26,989 INFO L87 Difference]: Start difference. First operand 4912 states and 5370 transitions. Second operand has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:29,193 INFO L93 Difference]: Finished difference Result 9565 states and 10591 transitions. [2021-10-13 00:19:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 00:19:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-10-13 00:19:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:29,194 INFO L225 Difference]: With dead ends: 9565 [2021-10-13 00:19:29,194 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 00:19:29,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 1257.9ms TimeCoverageRelationStatistics Valid=1995, Invalid=4325, Unknown=0, NotChecked=0, Total=6320 [2021-10-13 00:19:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 00:19:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 00:19:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-13 00:19:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:19:29,202 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2021-10-13 00:19:29,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:29,203 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:19:29,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:29,203 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:19:29,203 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 00:19:29,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:19:29,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:29,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 00:19:29,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 00:19:29,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:19:29,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:25:59,930 WARN L207 SmtUtils]: Spent 6.51 m on a formula simplification. DAG size of input: 5334 DAG size of output: 3539 [2021-10-13 00:28:25,029 WARN L207 SmtUtils]: Spent 2.42 m on a formula simplification. DAG size of input: 3421 DAG size of output: 165 [2021-10-13 00:28:25,033 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2021-10-13 00:28:25,034 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 24) the Hoare annotation is: (let ((.cse42 (+ ~last~0 1))) (let ((.cse18 (<= ULTIMATE.start_main_~c~0 (+ 7 ~last~0))) (.cse10 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 12))) (.cse20 (<= ULTIMATE.start_main_~c~0 10)) (.cse16 (= ULTIMATE.start_main_~c~0 0)) (.cse17 (<= 7 ULTIMATE.start_main_~c~0)) (.cse29 (<= ULTIMATE.start_main_~c~0 7)) (.cse30 (<= ULTIMATE.start_main_~c~0 12)) (.cse25 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 11))) (.cse24 (<= ULTIMATE.start_main_~c~0 2)) (.cse6 (<= 2 ULTIMATE.start_main_~c~0)) (.cse13 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 2))) (.cse31 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 5))) (.cse26 (<= 5 ULTIMATE.start_main_~c~0)) (.cse27 (<= ULTIMATE.start_main_~c~0 5)) (.cse22 (<= 12 ULTIMATE.start_main_~c~0)) (.cse35 (<= 11 ULTIMATE.start_main_~c~0)) (.cse38 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 8))) (.cse28 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 4))) (.cse23 (<= 4 ULTIMATE.start_main_~c~0)) (.cse19 (<= 10 ULTIMATE.start_main_~c~0)) (.cse39 (<= ~last~0 17)) (.cse37 (<= ULTIMATE.start_main_~c~0 8)) (.cse21 (<= 8 ULTIMATE.start_main_~c~0)) (.cse3 (= ULTIMATE.start_main_~st~0 1)) (.cse8 (<= 13 ULTIMATE.start_main_~c~0)) (.cse7 (< ULTIMATE.start_main_~c~0 200001)) (.cse14 (<= ULTIMATE.start_main_~c~0 6)) (.cse11 (<= 6 ULTIMATE.start_main_~c~0)) (.cse41 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 6))) (.cse32 (<= 1 ULTIMATE.start_main_~c~0)) (.cse40 (<= ULTIMATE.start_main_~c~0 .cse42)) (.cse33 (<= ULTIMATE.start_main_~c~0 1)) (.cse0 (<= 3 ULTIMATE.start_main_~c~0)) (.cse1 (<= ULTIMATE.start_main_~c~0 3)) (.cse2 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse12 (<= .cse42 ULTIMATE.start_main_~c~0)) (.cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0)) (.cse15 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 3))) (.cse5 (= ULTIMATE.start_main_~b~0 0)) (.cse9 (<= ~last~0 2)) (.cse34 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 9))) (.cse36 (<= 9 ULTIMATE.start_main_~c~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse5 .cse6 .cse7 .cse3 .cse4) (and .cse8 .cse2 .cse7 .cse3 .cse4) (and .cse9 .cse10 .cse2 .cse11 .cse4) (and .cse5 .cse12 .cse6 .cse7 .cse4 .cse13) (and .cse2 .cse14 .cse12 .cse11 .cse4 .cse15) (and .cse2 .cse3 .cse4 .cse16) (and .cse17 .cse9 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 13)) .cse2 .cse4) (and .cse17 .cse5 .cse18 .cse12 .cse7 .cse4) (and .cse18 .cse19 .cse2 .cse12 .cse4 .cse20) (and .cse9 .cse2 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 14)) .cse4 .cse21) (and .cse5 .cse22 .cse9 .cse10 .cse4) (and (<= ULTIMATE.start_main_~c~0 4) .cse2 .cse3 .cse4 .cse23) (and .cse24 .cse2 .cse6 .cse3 .cse4) (and .cse25 .cse26 .cse27 .cse2 .cse12 .cse4) (and .cse19 .cse2 .cse3 .cse4 .cse20) (and .cse17 .cse2 .cse12 .cse28 .cse29 .cse4) (and .cse22 .cse2 .cse30 .cse3 .cse4) (and .cse5 .cse3 .cse4 .cse16) (and .cse26 .cse5 .cse12 .cse7 .cse4 .cse31) (and .cse17 .cse2 .cse29 .cse3 .cse4) (and .cse2 .cse32 .cse33 .cse3 .cse4) (and .cse22 .cse2 .cse12 .cse30 .cse34 .cse4) (and .cse25 .cse5 .cse9 .cse35 .cse4) (and .cse5 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 10)) .cse19 .cse12 .cse7 .cse4) (and .cse9 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 15)) .cse2 .cse4 .cse36) (and .cse24 .cse2 .cse12 .cse6 .cse4 .cse13) (and .cse37 .cse2 .cse12 .cse4 .cse21 .cse31) (and .cse38 .cse39 .cse2 .cse35 .cse12 .cse4) (and .cse26 .cse27 .cse2 .cse3 .cse4) (and (<= ULTIMATE.start_main_~c~0 11) .cse2 .cse35 .cse3 .cse4) (and .cse22 .cse9 .cse2 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 18)) .cse4) (and .cse2 .cse32 .cse12 .cse40 .cse33 .cse4) (and .cse9 .cse2 .cse28 .cse4 .cse23) (and .cse9 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 17)) .cse2 .cse35 .cse4) (and .cse38 .cse5 .cse12 .cse7 .cse4 .cse21) (and .cse39 .cse2 .cse12 .cse40 .cse4 .cse23) (and (<= ULTIMATE.start_main_~c~0 9) .cse2 .cse3 .cse4 .cse36) (and .cse8 .cse2 .cse12 .cse7 .cse4) (and .cse5 .cse12 .cse28 .cse7 .cse4 .cse23) (and (<= ULTIMATE.start_main_~c~0 (+ ~last~0 16)) .cse9 .cse19 .cse2 .cse4) (and .cse39 .cse2 .cse12 .cse4 .cse36 .cse41) (and .cse37 .cse2 .cse3 .cse4 .cse21) (and .cse5 .cse32 .cse33 .cse3 .cse4) (and .cse2 .cse14 .cse11 .cse3 .cse4) (and .cse0 .cse5 .cse12 .cse7 .cse4 .cse15) (and .cse5 .cse8 .cse12 .cse7 .cse4) (and .cse5 .cse14 .cse12 .cse11 .cse4 .cse41) (and .cse5 .cse32 .cse12 .cse40 .cse33 .cse4) (and .cse0 .cse1 .cse2 .cse12 .cse4 .cse15) (and (= ULTIMATE.start_main_~a~0 0) .cse5 .cse9 .cse34 .cse36)))) [2021-10-13 00:28:25,035 INFO L857 garLoopResultBuilder]: For program point L23-4(lines 21 31) no Hoare annotation was computed. [2021-10-13 00:28:25,035 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 00:28:25,035 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 00:28:25,035 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 00:28:25,036 INFO L857 garLoopResultBuilder]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2021-10-13 00:28:25,036 INFO L857 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-10-13 00:28:25,036 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-13 00:28:25,036 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 14) no Hoare annotation was computed. [2021-10-13 00:28:25,036 INFO L853 garLoopResultBuilder]: At program point L12-2(lines 11 31) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and (<= 200000 ULTIMATE.start_main_~c~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< ULTIMATE.start_main_~c~0 200001) .cse0) (and (= ULTIMATE.start_main_~b~0 0) .cse0 (= ULTIMATE.start_main_~c~0 0)))) [2021-10-13 00:28:25,037 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 00:28:25,037 INFO L857 garLoopResultBuilder]: For program point L25-1(lines 21 31) no Hoare annotation was computed. [2021-10-13 00:28:25,037 INFO L857 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2021-10-13 00:28:25,037 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 32) no Hoare annotation was computed. [2021-10-13 00:28:25,043 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:28:25,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:28:25 BoogieIcfgContainer [2021-10-13 00:28:25,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:28:25,094 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:28:25,094 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:28:25,094 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:28:25,095 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:18:39" (3/4) ... [2021-10-13 00:28:25,099 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 00:28:25,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-13 00:28:25,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 00:28:25,112 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:28:25,112 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:28:25,158 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:28:25,158 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:28:25,159 INFO L168 Benchmark]: Toolchain (without parser) took 586516.46 ms. Allocated memory was 90.2 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 57.3 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 2.9 GB. Max. memory is 16.1 GB. [2021-10-13 00:28:25,160 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory is still 45.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:28:25,160 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.41 ms. Allocated memory is still 90.2 MB. Free memory was 57.2 MB in the beginning and 66.4 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:28:25,161 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.98 ms. Allocated memory is still 90.2 MB. Free memory was 66.4 MB in the beginning and 64.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:28:25,161 INFO L168 Benchmark]: Boogie Preprocessor took 43.78 ms. Allocated memory is still 90.2 MB. Free memory was 64.9 MB in the beginning and 63.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:28:25,162 INFO L168 Benchmark]: RCFGBuilder took 315.26 ms. Allocated memory is still 90.2 MB. Free memory was 63.8 MB in the beginning and 54.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:28:25,163 INFO L168 Benchmark]: TraceAbstraction took 585775.81 ms. Allocated memory was 90.2 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 54.2 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.1 GB. [2021-10-13 00:28:25,163 INFO L168 Benchmark]: Witness Printer took 64.77 ms. Allocated memory is still 6.0 GB. Free memory was 3.1 GB in the beginning and 3.1 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:28:25,166 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory is still 45.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.41 ms. Allocated memory is still 90.2 MB. Free memory was 57.2 MB in the beginning and 66.4 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.98 ms. Allocated memory is still 90.2 MB. Free memory was 66.4 MB in the beginning and 64.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.78 ms. Allocated memory is still 90.2 MB. Free memory was 64.9 MB in the beginning and 63.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 315.26 ms. Allocated memory is still 90.2 MB. Free memory was 63.8 MB in the beginning and 54.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 585775.81 ms. Allocated memory was 90.2 MB in the beginning and 6.0 GB in the end (delta: 5.9 GB). Free memory was 54.2 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.1 GB. * Witness Printer took 64.77 ms. Allocated memory is still 6.0 GB. Free memory was 3.1 GB in the beginning and 3.1 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 585609.9ms, OverallIterations: 29, TraceHistogramMax: 66, EmptinessCheckTime: 66.9ms, AutomataDifference: 20946.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 535612.1ms, InitialAbstractionConstructionTime: 34.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 437 SDtfs, 3115 SDslu, 934 SDs, 0 SdLazy, 5681 SolverSat, 675 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3278.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3293 GetRequests, 2245 SyntacticMatches, 0 SemanticMatches, 1048 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68769 ImplicationChecksByTransitivity, 14805.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4912occurred in iteration=28, InterpolantAutomatonStates: 1002, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2379.6ms AutomataMinimizationTime, 29 MinimizatonAttempts, 8318 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 1969 NumberOfFragments, 1008 HoareAnnotationTreeSize, 2 FomulaSimplifications, 82151409592358781 FormulaSimplificationTreeSizeReduction, 390525.5ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 512870058090589 FormulaSimplificationTreeSizeReductionInter, 145037.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 267.4ms SsaConstructionTime, 989.0ms SatisfiabilityAnalysisTime, 12397.0ms InterpolantComputationTime, 4134 NumberOfCodeBlocks, 3536 NumberOfCodeBlocksAsserted, 146 NumberOfCheckSat, 4078 ConstructedInterpolants, 0 QuantifiedInterpolants, 10507 SizeOfPredicates, 57 NumberOfNonLiveVariables, 3487 ConjunctsInSsa, 334 ConjunctsInUnsatCore, 56 InterpolantComputations, 7 PerfectInterpolantSequences, 53187/65946 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (((200000 <= c && 1 == cond) && c < 200001) && b == a) || ((b == 0 && b == a) && c == 0) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((3 <= c && c <= 3) && 1 == cond) && st == 1) && b == a) || ((((b == 0 && 2 <= c) && c < 200001) && st == 1) && b == a)) || ((((13 <= c && 1 == cond) && c < 200001) && st == 1) && b == a)) || ((((last <= 2 && c <= last + 12) && 1 == cond) && 6 <= c) && b == a)) || (((((b == 0 && last + 1 <= c) && 2 <= c) && c < 200001) && b == a) && c <= last + 2)) || (((((1 == cond && c <= 6) && last + 1 <= c) && 6 <= c) && b == a) && c <= last + 3)) || (((1 == cond && st == 1) && b == a) && c == 0)) || ((((7 <= c && last <= 2) && c <= last + 13) && 1 == cond) && b == a)) || (((((7 <= c && b == 0) && c <= 7 + last) && last + 1 <= c) && c < 200001) && b == a)) || (((((c <= 7 + last && 10 <= c) && 1 == cond) && last + 1 <= c) && b == a) && c <= 10)) || ((((last <= 2 && 1 == cond) && c <= last + 14) && b == a) && 8 <= c)) || ((((b == 0 && 12 <= c) && last <= 2) && c <= last + 12) && b == a)) || ((((c <= 4 && 1 == cond) && st == 1) && b == a) && 4 <= c)) || ((((c <= 2 && 1 == cond) && 2 <= c) && st == 1) && b == a)) || (((((c <= last + 11 && 5 <= c) && c <= 5) && 1 == cond) && last + 1 <= c) && b == a)) || ((((10 <= c && 1 == cond) && st == 1) && b == a) && c <= 10)) || (((((7 <= c && 1 == cond) && last + 1 <= c) && c <= last + 4) && c <= 7) && b == a)) || ((((12 <= c && 1 == cond) && c <= 12) && st == 1) && b == a)) || (((b == 0 && st == 1) && b == a) && c == 0)) || (((((5 <= c && b == 0) && last + 1 <= c) && c < 200001) && b == a) && c <= last + 5)) || ((((7 <= c && 1 == cond) && c <= 7) && st == 1) && b == a)) || ((((1 == cond && 1 <= c) && c <= 1) && st == 1) && b == a)) || (((((12 <= c && 1 == cond) && last + 1 <= c) && c <= 12) && c <= last + 9) && b == a)) || ((((c <= last + 11 && b == 0) && last <= 2) && 11 <= c) && b == a)) || (((((b == 0 && c <= last + 10) && 10 <= c) && last + 1 <= c) && c < 200001) && b == a)) || ((((last <= 2 && c <= last + 15) && 1 == cond) && b == a) && 9 <= c)) || (((((c <= 2 && 1 == cond) && last + 1 <= c) && 2 <= c) && b == a) && c <= last + 2)) || (((((c <= 8 && 1 == cond) && last + 1 <= c) && b == a) && 8 <= c) && c <= last + 5)) || (((((c <= last + 8 && last <= 17) && 1 == cond) && 11 <= c) && last + 1 <= c) && b == a)) || ((((5 <= c && c <= 5) && 1 == cond) && st == 1) && b == a)) || ((((c <= 11 && 1 == cond) && 11 <= c) && st == 1) && b == a)) || ((((12 <= c && last <= 2) && 1 == cond) && c <= last + 18) && b == a)) || (((((1 == cond && 1 <= c) && last + 1 <= c) && c <= last + 1) && c <= 1) && b == a)) || ((((last <= 2 && 1 == cond) && c <= last + 4) && b == a) && 4 <= c)) || ((((last <= 2 && c <= last + 17) && 1 == cond) && 11 <= c) && b == a)) || (((((c <= last + 8 && b == 0) && last + 1 <= c) && c < 200001) && b == a) && 8 <= c)) || (((((last <= 17 && 1 == cond) && last + 1 <= c) && c <= last + 1) && b == a) && 4 <= c)) || ((((c <= 9 && 1 == cond) && st == 1) && b == a) && 9 <= c)) || ((((13 <= c && 1 == cond) && last + 1 <= c) && c < 200001) && b == a)) || (((((b == 0 && last + 1 <= c) && c <= last + 4) && c < 200001) && b == a) && 4 <= c)) || ((((c <= last + 16 && last <= 2) && 10 <= c) && 1 == cond) && b == a)) || (((((last <= 17 && 1 == cond) && last + 1 <= c) && b == a) && 9 <= c) && c <= last + 6)) || ((((c <= 8 && 1 == cond) && st == 1) && b == a) && 8 <= c)) || ((((b == 0 && 1 <= c) && c <= 1) && st == 1) && b == a)) || ((((1 == cond && c <= 6) && 6 <= c) && st == 1) && b == a)) || (((((3 <= c && b == 0) && last + 1 <= c) && c < 200001) && b == a) && c <= last + 3)) || ((((b == 0 && 13 <= c) && last + 1 <= c) && c < 200001) && b == a)) || (((((b == 0 && c <= 6) && last + 1 <= c) && 6 <= c) && b == a) && c <= last + 6)) || (((((b == 0 && 1 <= c) && last + 1 <= c) && c <= last + 1) && c <= 1) && b == a)) || (((((3 <= c && c <= 3) && 1 == cond) && last + 1 <= c) && b == a) && c <= last + 3)) || ((((a == 0 && b == 0) && last <= 2) && c <= last + 9) && 9 <= c) RESULT: Ultimate proved your program to be correct! [2021-10-13 00:28:25,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfdd208-0f06-436b-bb4e-23a06b91adb0/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...