./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD --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 7f0424dbafec10d34a77570c428224cb0ba56b8b9f5906b463f2dcbc550354ee ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:48:03,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:48:03,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:48:03,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:48:03,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:48:03,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:48:03,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:48:03,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:48:03,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:48:03,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:48:03,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:48:03,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:48:03,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:48:03,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:48:03,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:48:03,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:48:03,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:48:03,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:48:03,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:48:03,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:48:03,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:48:03,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:48:03,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:48:03,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:48:03,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:48:03,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:48:03,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:48:03,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:48:03,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:48:03,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:48:03,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:48:03,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:48:03,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:48:03,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:48:03,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:48:03,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:48:03,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:48:03,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:48:03,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:48:03,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:48:03,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:48:03,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 22:48:03,266 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:48:03,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:48:03,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:48:03,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:48:03,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:48:03,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:48:03,276 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:48:03,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:48:03,276 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:48:03,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:48:03,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:48:03,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:48:03,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 22:48:03,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:48:03,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 22:48:03,279 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:48:03,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 22:48:03,279 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:48:03,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 22:48:03,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:48:03,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:48:03,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:48:03,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:48:03,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:48:03,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:48:03,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 22:48:03,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:48:03,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:48:03,282 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 22:48:03,284 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 22:48:03,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 22:48:03,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:48:03,285 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_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f0424dbafec10d34a77570c428224cb0ba56b8b9f5906b463f2dcbc550354ee [2021-10-28 22:48:03,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:48:03,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:48:03,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:48:03,582 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:48:03,583 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:48:03,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2021-10-28 22:48:03,661 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/data/3e805574d/b288ca1d9d6a433db866bd7c7862cb5b/FLAG8cedf60f4 [2021-10-28 22:48:04,123 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:48:04,126 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2021-10-28 22:48:04,138 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/data/3e805574d/b288ca1d9d6a433db866bd7c7862cb5b/FLAG8cedf60f4 [2021-10-28 22:48:04,475 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/data/3e805574d/b288ca1d9d6a433db866bd7c7862cb5b [2021-10-28 22:48:04,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:48:04,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 22:48:04,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:48:04,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:48:04,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:48:04,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622d9a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04, skipping insertion in model container [2021-10-28 22:48:04,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:48:04,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:48:04,716 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_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2021-10-28 22:48:04,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:48:04,768 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:48:04,783 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_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2021-10-28 22:48:04,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:48:04,833 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:48:04,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04 WrapperNode [2021-10-28 22:48:04,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:48:04,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 22:48:04,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 22:48:04,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 22:48:04,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 22:48:04,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:48:04,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:48:04,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:48:04,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:48:04,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:48:04,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:48:04,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:48:04,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04" (1/1) ... [2021-10-28 22:48:04,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:48:04,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:04,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:48:05,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:48:05,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 22:48:05,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:48:05,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:48:05,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:48:05,330 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:48:05,346 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-28 22:48:05,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:48:05 BoogieIcfgContainer [2021-10-28 22:48:05,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:48:05,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:48:05,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:48:05,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:48:05,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:48:04" (1/3) ... [2021-10-28 22:48:05,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45cd2c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:48:05, skipping insertion in model container [2021-10-28 22:48:05,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:48:04" (2/3) ... [2021-10-28 22:48:05,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45cd2c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:48:05, skipping insertion in model container [2021-10-28 22:48:05,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:48:05" (3/3) ... [2021-10-28 22:48:05,356 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.c [2021-10-28 22:48:05,376 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:48:05,376 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-28 22:48:05,454 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:48:05,460 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 22:48:05,460 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-28 22:48:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 21 states have (on average 1.619047619047619) internal successors, (34), 24 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) [2021-10-28 22:48:05,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 22:48:05,478 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:05,479 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:05,479 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:05,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:05,485 INFO L85 PathProgramCache]: Analyzing trace with hash 120613195, now seen corresponding path program 1 times [2021-10-28 22:48:05,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:05,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118076048] [2021-10-28 22:48:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:05,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:05,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:05,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118076048] [2021-10-28 22:48:05,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118076048] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:48:05,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:48:05,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 22:48:05,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752221938] [2021-10-28 22:48:05,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 22:48:05,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:05,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 22:48:05,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 22:48:05,679 INFO L87 Difference]: Start difference. First operand has 25 states, 21 states have (on average 1.619047619047619) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:05,694 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-10-28 22:48:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 22:48:05,696 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-10-28 22:48:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:05,704 INFO L225 Difference]: With dead ends: 47 [2021-10-28 22:48:05,705 INFO L226 Difference]: Without dead ends: 21 [2021-10-28 22:48:05,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 22:48:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-28 22:48:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-28 22:48:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 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) [2021-10-28 22:48:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-10-28 22:48:05,738 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2021-10-28 22:48:05,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:05,738 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-10-28 22:48:05,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-10-28 22:48:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 22:48:05,740 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:05,740 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:05,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:48:05,741 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-28 22:48:05,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:05,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497334045] [2021-10-28 22:48:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:05,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:05,760 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:05,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954154622] [2021-10-28 22:48:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:05,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:05,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:05,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:05,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:48:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:05,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 22:48:05,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:06,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:06,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497334045] [2021-10-28 22:48:06,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:06,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954154622] [2021-10-28 22:48:06,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954154622] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:48:06,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:48:06,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:48:06,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725368380] [2021-10-28 22:48:06,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:48:06,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:48:06,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:48:06,017 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:06,165 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-10-28 22:48:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:48:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-10-28 22:48:06,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:06,167 INFO L225 Difference]: With dead ends: 42 [2021-10-28 22:48:06,167 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 22:48:06,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:48:06,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 22:48:06,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2021-10-28 22:48:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-28 22:48:06,174 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2021-10-28 22:48:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:06,177 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-28 22:48:06,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:06,177 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-28 22:48:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 22:48:06,178 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:06,178 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:06,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-28 22:48:06,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:06,399 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:06,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:06,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1182850160, now seen corresponding path program 1 times [2021-10-28 22:48:06,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:06,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310792231] [2021-10-28 22:48:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:06,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:06,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:06,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393811323] [2021-10-28 22:48:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:06,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:06,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:06,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:06,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 22:48:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:06,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 22:48:06,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:06,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:06,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310792231] [2021-10-28 22:48:06,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:06,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393811323] [2021-10-28 22:48:06,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393811323] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:48:06,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:48:06,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:48:06,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676940433] [2021-10-28 22:48:06,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:48:06,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:06,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:48:06,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:48:06,556 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.25) 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) [2021-10-28 22:48:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:06,568 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-10-28 22:48:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:48:06,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) 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 [2021-10-28 22:48:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:06,570 INFO L225 Difference]: With dead ends: 32 [2021-10-28 22:48:06,570 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 22:48:06,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:48:06,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 22:48:06,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 22:48:06,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-28 22:48:06,575 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2021-10-28 22:48:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:06,575 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-28 22:48:06,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) 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) [2021-10-28 22:48:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-28 22:48:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:48:06,576 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:06,576 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:06,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:06,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:06,790 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:06,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1415754199, now seen corresponding path program 1 times [2021-10-28 22:48:06,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:06,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628540280] [2021-10-28 22:48:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:06,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:06,808 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:06,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344265193] [2021-10-28 22:48:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:06,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:06,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:06,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:06,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 22:48:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:06,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 22:48:06,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:07,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:07,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628540280] [2021-10-28 22:48:07,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:07,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344265193] [2021-10-28 22:48:07,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344265193] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:48:07,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:48:07,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 22:48:07,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820883675] [2021-10-28 22:48:07,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:48:07,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:48:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:48:07,531 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:09,180 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-10-28 22:48:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:48:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-28 22:48:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:09,182 INFO L225 Difference]: With dead ends: 52 [2021-10-28 22:48:09,182 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 22:48:09,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:48:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 22:48:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2021-10-28 22:48:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-10-28 22:48:09,190 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 11 [2021-10-28 22:48:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:09,190 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-10-28 22:48:09,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-10-28 22:48:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 22:48:09,191 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:09,191 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:09,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:09,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:09,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:09,407 INFO L85 PathProgramCache]: Analyzing trace with hash 965004492, now seen corresponding path program 1 times [2021-10-28 22:48:09,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:09,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509322941] [2021-10-28 22:48:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:09,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:09,436 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:09,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764348490] [2021-10-28 22:48:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:09,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:09,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:09,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:09,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 22:48:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:09,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 22:48:09,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:09,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:09,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509322941] [2021-10-28 22:48:09,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:09,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764348490] [2021-10-28 22:48:09,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764348490] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:48:09,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:48:09,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:48:09,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986834629] [2021-10-28 22:48:09,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:48:09,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:48:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:48:09,638 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:09,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:09,784 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-10-28 22:48:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:48:09,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-10-28 22:48:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:09,786 INFO L225 Difference]: With dead ends: 57 [2021-10-28 22:48:09,786 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 22:48:09,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:48:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 22:48:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-10-28 22:48:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.457142857142857) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2021-10-28 22:48:09,793 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 13 [2021-10-28 22:48:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:09,793 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2021-10-28 22:48:09,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2021-10-28 22:48:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 22:48:09,794 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:09,795 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:09,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:10,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:10,014 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:10,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1005087291, now seen corresponding path program 1 times [2021-10-28 22:48:10,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:10,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503310731] [2021-10-28 22:48:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:10,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:10,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:10,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095748614] [2021-10-28 22:48:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:10,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:10,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:10,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:10,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 22:48:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:10,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 22:48:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:13,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:13,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503310731] [2021-10-28 22:48:13,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:13,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095748614] [2021-10-28 22:48:13,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095748614] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:48:13,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:48:13,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 22:48:13,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379137659] [2021-10-28 22:48:13,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:48:13,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:13,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:48:13,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:48:13,089 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:13,711 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2021-10-28 22:48:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:48:13,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-10-28 22:48:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:13,713 INFO L225 Difference]: With dead ends: 68 [2021-10-28 22:48:13,713 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 22:48:13,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:48:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 22:48:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 43. [2021-10-28 22:48:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.45) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-10-28 22:48:13,721 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 13 [2021-10-28 22:48:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:13,721 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-10-28 22:48:13,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-10-28 22:48:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 22:48:13,722 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:13,722 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:13,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:13,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:13,923 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1092907201, now seen corresponding path program 1 times [2021-10-28 22:48:13,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:13,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135328618] [2021-10-28 22:48:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:13,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:13,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:13,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795566275] [2021-10-28 22:48:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:13,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:13,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:13,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:13,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 22:48:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:14,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:48:14,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:14,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:14,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135328618] [2021-10-28 22:48:14,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:14,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795566275] [2021-10-28 22:48:14,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795566275] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:48:14,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:48:14,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-28 22:48:14,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307823696] [2021-10-28 22:48:14,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:48:14,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:14,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:48:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:48:14,107 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:14,133 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-10-28 22:48:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:48:14,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 22:48:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:14,136 INFO L225 Difference]: With dead ends: 57 [2021-10-28 22:48:14,136 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 22:48:14,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:48:14,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 22:48:14,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-28 22:48:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 48 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) [2021-10-28 22:48:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2021-10-28 22:48:14,154 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 14 [2021-10-28 22:48:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:14,155 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2021-10-28 22:48:14,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2021-10-28 22:48:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 22:48:14,156 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:14,156 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:14,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:14,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:14,381 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1175899963, now seen corresponding path program 1 times [2021-10-28 22:48:14,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:14,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605446302] [2021-10-28 22:48:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:14,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:14,396 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:14,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223250357] [2021-10-28 22:48:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:14,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:14,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:14,399 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:14,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 22:48:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:14,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 22:48:14,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:14,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:14,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605446302] [2021-10-28 22:48:14,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:14,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223250357] [2021-10-28 22:48:14,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223250357] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:48:14,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:48:14,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 22:48:14,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330413603] [2021-10-28 22:48:14,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:48:14,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:14,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:48:14,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:48:14,759 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:15,029 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2021-10-28 22:48:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:48:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 22:48:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:15,031 INFO L225 Difference]: With dead ends: 63 [2021-10-28 22:48:15,031 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 22:48:15,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:48:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 22:48:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-10-28 22:48:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 49 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) [2021-10-28 22:48:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2021-10-28 22:48:15,039 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 14 [2021-10-28 22:48:15,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:15,039 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2021-10-28 22:48:15,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2021-10-28 22:48:15,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:48:15,040 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:15,041 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:15,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:15,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 22:48:15,258 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:15,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:15,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2112377150, now seen corresponding path program 1 times [2021-10-28 22:48:15,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:15,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061439821] [2021-10-28 22:48:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:15,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:15,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:15,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102761121] [2021-10-28 22:48:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:15,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:15,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:15,277 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:15,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 22:48:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:15,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 22:48:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:15,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:15,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061439821] [2021-10-28 22:48:15,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:15,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102761121] [2021-10-28 22:48:15,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102761121] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:48:15,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:48:15,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 22:48:15,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380409212] [2021-10-28 22:48:15,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:48:15,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:15,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:48:15,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:48:15,623 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-10-28 22:48:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:15,913 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2021-10-28 22:48:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:48:15,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 15 [2021-10-28 22:48:15,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:15,915 INFO L225 Difference]: With dead ends: 70 [2021-10-28 22:48:15,915 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 22:48:15,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:48:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 22:48:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2021-10-28 22:48:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.38) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2021-10-28 22:48:15,922 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 15 [2021-10-28 22:48:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:15,923 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2021-10-28 22:48:15,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-10-28 22:48:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2021-10-28 22:48:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:48:15,924 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:15,924 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:15,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:16,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:16,150 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:16,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2114224192, now seen corresponding path program 1 times [2021-10-28 22:48:16,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:16,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240158311] [2021-10-28 22:48:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:16,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:16,162 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:16,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902259172] [2021-10-28 22:48:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:16,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:16,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:16,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:16,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 22:48:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:16,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 22:48:16,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:16,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:16,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240158311] [2021-10-28 22:48:16,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:16,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902259172] [2021-10-28 22:48:16,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902259172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:48:16,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:48:16,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 22:48:16,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004139159] [2021-10-28 22:48:16,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:48:16,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:48:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:48:16,567 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2021-10-28 22:48:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:16,918 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2021-10-28 22:48:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:48:16,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 15 [2021-10-28 22:48:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:16,919 INFO L225 Difference]: With dead ends: 71 [2021-10-28 22:48:16,920 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 22:48:16,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:48:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 22:48:16,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2021-10-28 22:48:16,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2021-10-28 22:48:16,927 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 15 [2021-10-28 22:48:16,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:16,927 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2021-10-28 22:48:16,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2021-10-28 22:48:16,927 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2021-10-28 22:48:16,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 22:48:16,928 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:16,928 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:16,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:17,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 22:48:17,130 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1951591878, now seen corresponding path program 1 times [2021-10-28 22:48:17,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:17,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409647758] [2021-10-28 22:48:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:17,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:17,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:17,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760077406] [2021-10-28 22:48:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:17,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:17,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:17,141 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:17,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 22:48:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:17,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 22:48:17,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:17,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:17,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409647758] [2021-10-28 22:48:17,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:17,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760077406] [2021-10-28 22:48:17,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760077406] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:48:17,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:48:17,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:48:17,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210212098] [2021-10-28 22:48:17,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:48:17,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:48:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:48:17,399 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-10-28 22:48:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:17,514 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-10-28 22:48:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:48:17,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-28 22:48:17,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:17,517 INFO L225 Difference]: With dead ends: 80 [2021-10-28 22:48:17,517 INFO L226 Difference]: Without dead ends: 76 [2021-10-28 22:48:17,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:48:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-28 22:48:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2021-10-28 22:48:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-10-28 22:48:17,527 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 16 [2021-10-28 22:48:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:17,527 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-10-28 22:48:17,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-10-28 22:48:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-10-28 22:48:17,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 22:48:17,528 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:17,529 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:17,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:17,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 22:48:17,742 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:17,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:17,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1461153292, now seen corresponding path program 2 times [2021-10-28 22:48:17,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:17,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016394944] [2021-10-28 22:48:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:17,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:17,753 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:17,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802724931] [2021-10-28 22:48:17,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:48:17,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:17,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:17,759 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:17,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 22:48:17,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:48:17,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:48:17,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 22:48:17,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:48:17,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:17,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016394944] [2021-10-28 22:48:17,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:17,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802724931] [2021-10-28 22:48:17,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802724931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:48:17,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:48:17,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 22:48:17,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8282536] [2021-10-28 22:48:17,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:48:17,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:17,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:48:17,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:48:17,958 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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) [2021-10-28 22:48:17,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:17,981 INFO L93 Difference]: Finished difference Result 81 states and 110 transitions. [2021-10-28 22:48:17,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:48:17,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 22:48:17,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:17,983 INFO L225 Difference]: With dead ends: 81 [2021-10-28 22:48:17,983 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 22:48:17,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:48:17,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 22:48:17,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2021-10-28 22:48:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:17,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-10-28 22:48:17,989 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2021-10-28 22:48:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:17,989 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-10-28 22:48:17,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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) [2021-10-28 22:48:17,990 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-10-28 22:48:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 22:48:17,990 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:17,990 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:18,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:18,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:18,211 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash 38054995, now seen corresponding path program 1 times [2021-10-28 22:48:18,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:18,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943364227] [2021-10-28 22:48:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:18,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:18,222 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:18,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770340105] [2021-10-28 22:48:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:18,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:18,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:18,232 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:18,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 22:48:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:48:18,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 22:48:18,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:48:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:48:18,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:48:18,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943364227] [2021-10-28 22:48:18,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 22:48:18,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770340105] [2021-10-28 22:48:18,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770340105] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:48:18,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:48:18,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:48:18,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146490338] [2021-10-28 22:48:18,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:48:18,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:48:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:48:18,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:48:18,607 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-28 22:48:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:48:23,340 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-10-28 22:48:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:48:23,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 18 [2021-10-28 22:48:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:48:23,341 INFO L225 Difference]: With dead ends: 40 [2021-10-28 22:48:23,341 INFO L226 Difference]: Without dead ends: 38 [2021-10-28 22:48:23,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:48:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-28 22:48:23,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-10-28 22:48:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.25) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:48:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-10-28 22:48:23,347 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-10-28 22:48:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:48:23,347 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-10-28 22:48:23,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-10-28 22:48:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-10-28 22:48:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 22:48:23,348 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:48:23,348 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:23,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:23,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:23,558 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 22:48:23,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:48:23,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1948915952, now seen corresponding path program 2 times [2021-10-28 22:48:23,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:48:23,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631869698] [2021-10-28 22:48:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:48:23,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:48:23,576 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 22:48:23,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906208945] [2021-10-28 22:48:23,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:48:23,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:23,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:48:23,590 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:48:23,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 22:48:23,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:48:23,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-28 22:48:23,776 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 22:48:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 22:48:23,813 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 22:48:23,813 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 22:48:23,814 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 22:48:23,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 22:48:23,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 22:48:23,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 22:48:24,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:48:24,019 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:48:24,022 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:48:24,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:48:24 BoogieIcfgContainer [2021-10-28 22:48:24,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:48:24,054 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:48:24,055 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:48:24,055 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:48:24,055 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:48:05" (3/4) ... [2021-10-28 22:48:24,057 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 22:48:24,119 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 22:48:24,119 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:48:24,121 INFO L168 Benchmark]: Toolchain (without parser) took 19641.93 ms. Allocated memory was 111.1 MB in the beginning and 136.3 MB in the end (delta: 25.2 MB). Free memory was 69.8 MB in the beginning and 36.8 MB in the end (delta: 33.0 MB). Peak memory consumption was 58.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:48:24,122 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 111.1 MB. Free memory is still 85.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:48:24,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.53 ms. Allocated memory is still 111.1 MB. Free memory was 69.6 MB in the beginning and 85.3 MB in the end (delta: -15.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:48:24,122 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.81 ms. Allocated memory is still 111.1 MB. Free memory was 85.3 MB in the beginning and 83.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:48:24,123 INFO L168 Benchmark]: Boogie Preprocessor took 34.01 ms. Allocated memory is still 111.1 MB. Free memory was 83.8 MB in the beginning and 82.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:48:24,123 INFO L168 Benchmark]: RCFGBuilder took 419.00 ms. Allocated memory is still 111.1 MB. Free memory was 82.5 MB in the beginning and 71.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:48:24,124 INFO L168 Benchmark]: TraceAbstraction took 18704.29 ms. Allocated memory was 111.1 MB in the beginning and 136.3 MB in the end (delta: 25.2 MB). Free memory was 71.2 MB in the beginning and 38.9 MB in the end (delta: 32.3 MB). Peak memory consumption was 60.6 MB. Max. memory is 16.1 GB. [2021-10-28 22:48:24,124 INFO L168 Benchmark]: Witness Printer took 64.86 ms. Allocated memory is still 136.3 MB. Free memory was 38.9 MB in the beginning and 36.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:48:24,126 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 111.1 MB. Free memory is still 85.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 353.53 ms. Allocated memory is still 111.1 MB. Free memory was 69.6 MB in the beginning and 85.3 MB in the end (delta: -15.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.81 ms. Allocated memory is still 111.1 MB. Free memory was 85.3 MB in the beginning and 83.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.01 ms. Allocated memory is still 111.1 MB. Free memory was 83.8 MB in the beginning and 82.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 419.00 ms. Allocated memory is still 111.1 MB. Free memory was 82.5 MB in the beginning and 71.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18704.29 ms. Allocated memory was 111.1 MB in the beginning and 136.3 MB in the end (delta: 25.2 MB). Free memory was 71.2 MB in the beginning and 38.9 MB in the end (delta: 32.3 MB). Peak memory consumption was 60.6 MB. Max. memory is 16.1 GB. * Witness Printer took 64.86 ms. Allocated memory is still 136.3 MB. Free memory was 38.9 MB in the beginning and 36.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=1] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=2] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=2] [L33] EXPR counter++ VAL [counter=3] [L33] COND FALSE !(counter++<2) [L12] COND TRUE !(cond) VAL [counter=3] [L14] reach_error() VAL [counter=3] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 18.5s, OverallIterations: 14, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 260 SDtfs, 602 SDslu, 481 SDs, 0 SdLazy, 610 SolverSat, 146 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 6.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 190 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=11, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 153 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 159 ConstructedInterpolants, 2 QuantifiedInterpolants, 1120 SizeOfPredicates, 75 NumberOfNonLiveVariables, 1016 ConjunctsInSsa, 180 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 17/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 22:48:24,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cfecd8d-1c6d-443f-9d16-9a4fae477c33/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...