./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.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_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg --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 aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:43:18,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:43:18,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:43:18,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:43:18,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:43:18,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:43:18,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:43:18,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:43:18,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:43:18,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:43:18,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:43:18,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:43:18,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:43:18,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:43:18,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:43:18,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:43:18,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:43:18,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:43:18,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:43:18,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:43:18,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:43:18,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:43:18,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:43:18,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:43:18,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:43:18,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:43:18,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:43:18,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:43:18,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:43:18,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:43:18,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:43:18,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:43:18,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:43:18,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:43:18,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:43:18,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:43:18,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:43:18,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:43:18,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:43:18,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:43:18,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:43:18,229 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:43:18,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:43:18,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:43:18,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:43:18,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:43:18,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:43:18,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:43:18,269 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:43:18,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:43:18,269 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:43:18,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:43:18,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:43:18,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:43:18,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:43:18,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:43:18,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:43:18,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:43:18,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:43:18,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:43:18,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:43:18,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:43:18,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:43:18,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:43:18,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:43:18,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:43:18,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:43:18,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:43:18,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:43:18,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:43:18,275 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:43:18,276 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:43:18,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:43:18,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:43:18,277 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_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 [2021-10-28 08:43:18,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:43:18,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:43:18,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:43:18,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:43:18,710 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:43:18,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-10-28 08:43:18,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/data/46688baf6/295418e21c2145328328c99510a8ab9b/FLAG77f3e370e [2021-10-28 08:43:19,395 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:43:19,395 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-10-28 08:43:19,403 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/data/46688baf6/295418e21c2145328328c99510a8ab9b/FLAG77f3e370e [2021-10-28 08:43:19,721 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/data/46688baf6/295418e21c2145328328c99510a8ab9b [2021-10-28 08:43:19,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:43:19,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:43:19,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:43:19,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:43:19,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:43:19,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:19" (1/1) ... [2021-10-28 08:43:19,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f6de1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:19, skipping insertion in model container [2021-10-28 08:43:19,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:19" (1/1) ... [2021-10-28 08:43:19,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:43:19,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:43:20,008 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_6e328681-b8ae-41f7-812a-f85028cc0d94/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2021-10-28 08:43:20,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:43:20,047 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:43:20,062 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_6e328681-b8ae-41f7-812a-f85028cc0d94/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2021-10-28 08:43:20,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:43:20,093 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:43:20,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20 WrapperNode [2021-10-28 08:43:20,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:43:20,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:43:20,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:43:20,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:43:20,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20" (1/1) ... [2021-10-28 08:43:20,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20" (1/1) ... [2021-10-28 08:43:20,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:43:20,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:43:20,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:43:20,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:43:20,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20" (1/1) ... [2021-10-28 08:43:20,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20" (1/1) ... [2021-10-28 08:43:20,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20" (1/1) ... [2021-10-28 08:43:20,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20" (1/1) ... [2021-10-28 08:43:20,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20" (1/1) ... [2021-10-28 08:43:20,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20" (1/1) ... [2021-10-28 08:43:20,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20" (1/1) ... [2021-10-28 08:43:20,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:43:20,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:43:20,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:43:20,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:43:20,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20" (1/1) ... [2021-10-28 08:43:20,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:43:20,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:20,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:43:20,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:43:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:43:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:43:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:43:20,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:43:20,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:43:20,719 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-10-28 08:43:20,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:20 BoogieIcfgContainer [2021-10-28 08:43:20,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:43:20,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:43:20,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:43:20,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:43:20,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:43:19" (1/3) ... [2021-10-28 08:43:20,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd9112c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:20, skipping insertion in model container [2021-10-28 08:43:20,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:20" (2/3) ... [2021-10-28 08:43:20,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd9112c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:20, skipping insertion in model container [2021-10-28 08:43:20,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:20" (3/3) ... [2021-10-28 08:43:20,760 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.c [2021-10-28 08:43:20,767 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:43:20,768 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-28 08:43:20,832 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:43:20,840 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 08:43:20,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-28 08:43:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 36 states have (on average 1.6111111111111112) 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 08:43:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:43:20,866 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:20,867 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:20,868 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:20,875 INFO L85 PathProgramCache]: Analyzing trace with hash -141782897, now seen corresponding path program 1 times [2021-10-28 08:43:20,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:20,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780181544] [2021-10-28 08:43:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:20,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:21,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:21,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780181544] [2021-10-28 08:43:21,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780181544] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:21,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:21,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 08:43:21,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031678458] [2021-10-28 08:43:21,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 08:43:21,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 08:43:21,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:43:21,178 INFO L87 Difference]: Start difference. First operand has 43 states, 36 states have (on average 1.6111111111111112) 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 08:43:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:21,201 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2021-10-28 08:43:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 08:43:21,202 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 08:43:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:21,212 INFO L225 Difference]: With dead ends: 83 [2021-10-28 08:43:21,212 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 08:43:21,216 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 08:43:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 08:43:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-28 08:43:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-10-28 08:43:21,256 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2021-10-28 08:43:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:21,257 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-10-28 08:43:21,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 08:43:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-10-28 08:43:21,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 08:43:21,258 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:21,259 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:21,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:43:21,260 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:21,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1057770534, now seen corresponding path program 1 times [2021-10-28 08:43:21,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:21,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168137436] [2021-10-28 08:43:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:21,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:21,286 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:21,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734238160] [2021-10-28 08:43:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:21,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:21,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:21,290 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:21,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:43:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:21,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:43:21,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:21,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:21,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168137436] [2021-10-28 08:43:21,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:21,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734238160] [2021-10-28 08:43:21,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734238160] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:21,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:21,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:43:21,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129126736] [2021-10-28 08:43:21,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:43:21,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:21,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:43:21,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:43:21,528 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 08:43:21,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:21,561 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-10-28 08:43:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:43:21,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 08:43:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:21,566 INFO L225 Difference]: With dead ends: 49 [2021-10-28 08:43:21,569 INFO L226 Difference]: Without dead ends: 41 [2021-10-28 08:43:21,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:43:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-28 08:43:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-10-28 08:43:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-10-28 08:43:21,586 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 14 [2021-10-28 08:43:21,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:21,587 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-10-28 08:43:21,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 08:43:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-10-28 08:43:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:43:21,591 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:21,592 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:21,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:21,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:21,810 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1568670238, now seen corresponding path program 1 times [2021-10-28 08:43:21,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:21,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217213583] [2021-10-28 08:43:21,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:21,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:21,840 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:21,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22186622] [2021-10-28 08:43:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:21,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:21,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:21,845 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:21,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:43:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:21,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:43:21,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:22,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:22,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217213583] [2021-10-28 08:43:22,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:22,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22186622] [2021-10-28 08:43:22,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22186622] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:22,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:22,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:43:22,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926025155] [2021-10-28 08:43:22,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:43:22,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:22,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:43:22,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:43:22,057 INFO L87 Difference]: Start difference. First operand 41 states and 44 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 08:43:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:22,195 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-10-28 08:43:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:43:22,196 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 08:43:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:22,198 INFO L225 Difference]: With dead ends: 69 [2021-10-28 08:43:22,198 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 08:43:22,199 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 08:43:22,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 08:43:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-10-28 08:43:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.25) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-10-28 08:43:22,213 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 15 [2021-10-28 08:43:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:22,214 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-10-28 08:43:22,214 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 08:43:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-10-28 08:43:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 08:43:22,215 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:22,216 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:22,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-28 08:43:22,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:22,431 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:22,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1384108475, now seen corresponding path program 1 times [2021-10-28 08:43:22,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:22,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383363468] [2021-10-28 08:43:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:22,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:22,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:22,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141184831] [2021-10-28 08:43:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:22,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:22,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:22,483 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:22,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:43:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:22,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 08:43:22,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:22,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:22,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383363468] [2021-10-28 08:43:22,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:22,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141184831] [2021-10-28 08:43:22,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141184831] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:22,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:22,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:43:22,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088778847] [2021-10-28 08:43:22,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:43:22,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:22,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:43:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:43:22,808 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 08:43:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:23,024 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-10-28 08:43:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:43:23,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 08:43:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:23,027 INFO L225 Difference]: With dead ends: 80 [2021-10-28 08:43:23,028 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 08:43:23,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:43:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 08:43:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2021-10-28 08:43:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:23,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-10-28 08:43:23,054 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2021-10-28 08:43:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:23,054 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-10-28 08:43:23,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 08:43:23,055 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-10-28 08:43:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:43:23,056 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:23,056 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:23,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:23,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:23,283 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:23,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1311460386, now seen corresponding path program 1 times [2021-10-28 08:43:23,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:23,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57838613] [2021-10-28 08:43:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:23,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:23,308 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:23,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677815754] [2021-10-28 08:43:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:23,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:23,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:23,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:23,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:43:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:23,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:43:23,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:23,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:23,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57838613] [2021-10-28 08:43:23,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:23,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677815754] [2021-10-28 08:43:23,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677815754] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:23,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:23,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:43:23,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49078355] [2021-10-28 08:43:23,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:43:23,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:23,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:43:23,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:43:23,683 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:23,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:23,756 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-10-28 08:43:23,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:43:23,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 08:43:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:23,764 INFO L225 Difference]: With dead ends: 64 [2021-10-28 08:43:23,764 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 08:43:23,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 08:43:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 08:43:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-10-28 08:43:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 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 08:43:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-10-28 08:43:23,780 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 18 [2021-10-28 08:43:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:23,780 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-10-28 08:43:23,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-10-28 08:43:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:43:23,781 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:23,782 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:23,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:23,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:23,983 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:23,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:23,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1862118746, now seen corresponding path program 1 times [2021-10-28 08:43:23,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:23,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600132727] [2021-10-28 08:43:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:23,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:24,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:24,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641613869] [2021-10-28 08:43:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:24,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:24,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:24,029 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:24,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:43:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:24,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:43:24,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:24,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:24,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600132727] [2021-10-28 08:43:24,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:24,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641613869] [2021-10-28 08:43:24,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641613869] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:24,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:24,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:43:24,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044209350] [2021-10-28 08:43:24,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:43:24,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:24,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:43:24,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:43:24,225 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 08:43:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:24,246 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2021-10-28 08:43:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:43:24,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 08:43:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:24,249 INFO L225 Difference]: With dead ends: 85 [2021-10-28 08:43:24,249 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 08:43:24,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:43:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 08:43:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-28 08:43:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 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 08:43:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-10-28 08:43:24,258 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 20 [2021-10-28 08:43:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:24,258 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-10-28 08:43:24,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 08:43:24,259 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-10-28 08:43:24,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:43:24,260 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:24,260 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:24,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:24,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:24,478 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:24,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:24,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1887855967, now seen corresponding path program 1 times [2021-10-28 08:43:24,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:24,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833633768] [2021-10-28 08:43:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:24,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:24,506 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:24,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359023264] [2021-10-28 08:43:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:24,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:24,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:24,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:24,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:43:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:24,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 08:43:24,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:24,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:24,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833633768] [2021-10-28 08:43:24,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:24,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359023264] [2021-10-28 08:43:24,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359023264] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:24,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:24,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:43:24,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959571619] [2021-10-28 08:43:24,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:43:24,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:43:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:43:24,979 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 08:43:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:25,071 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-10-28 08:43:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:43:25,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 08:43:25,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:25,073 INFO L225 Difference]: With dead ends: 62 [2021-10-28 08:43:25,074 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 08:43:25,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:43:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 08:43:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-10-28 08:43:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 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 08:43:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-10-28 08:43:25,085 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2021-10-28 08:43:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:25,085 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-10-28 08:43:25,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 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 08:43:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-10-28 08:43:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 08:43:25,087 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:25,087 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:25,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:25,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:25,301 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:25,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1753227772, now seen corresponding path program 1 times [2021-10-28 08:43:25,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:25,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575847180] [2021-10-28 08:43:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:25,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:25,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:25,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238187276] [2021-10-28 08:43:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:25,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:25,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:25,324 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:25,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:43:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:25,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 08:43:25,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:25,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:25,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575847180] [2021-10-28 08:43:25,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:25,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238187276] [2021-10-28 08:43:25,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238187276] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:25,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:25,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:43:25,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91396641] [2021-10-28 08:43:25,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:43:25,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:43:25,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:43:25,744 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:25,806 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-10-28 08:43:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:43:25,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-28 08:43:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:25,807 INFO L225 Difference]: With dead ends: 67 [2021-10-28 08:43:25,807 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 08:43:25,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:43:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 08:43:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2021-10-28 08:43:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-10-28 08:43:25,814 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2021-10-28 08:43:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:25,815 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-10-28 08:43:25,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:25,815 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-10-28 08:43:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 08:43:25,816 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:25,816 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:25,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:26,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:26,043 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:26,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:26,044 INFO L85 PathProgramCache]: Analyzing trace with hash 29719088, now seen corresponding path program 1 times [2021-10-28 08:43:26,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:26,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278797624] [2021-10-28 08:43:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:26,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:26,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:26,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965829760] [2021-10-28 08:43:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:26,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:26,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:26,068 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:26,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:43:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 08:43:26,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:26,330 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 08:43:26,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:26,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278797624] [2021-10-28 08:43:26,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:26,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965829760] [2021-10-28 08:43:26,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965829760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:26,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:26,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 08:43:26,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612974554] [2021-10-28 08:43:26,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:43:26,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:26,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:43:26,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:43:26,334 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:26,435 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-10-28 08:43:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:43:26,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-28 08:43:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:26,438 INFO L225 Difference]: With dead ends: 108 [2021-10-28 08:43:26,438 INFO L226 Difference]: Without dead ends: 106 [2021-10-28 08:43:26,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 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 08:43:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-28 08:43:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-10-28 08:43:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 77 states have internal predecessors, (92), 0 states have call successors, (0), 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 08:43:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2021-10-28 08:43:26,453 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 26 [2021-10-28 08:43:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:26,453 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2021-10-28 08:43:26,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2021-10-28 08:43:26,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 08:43:26,457 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:26,458 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:26,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:26,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 08:43:26,683 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:26,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1666886870, now seen corresponding path program 1 times [2021-10-28 08:43:26,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:26,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642077790] [2021-10-28 08:43:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:26,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:26,691 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:26,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013686202] [2021-10-28 08:43:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:26,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:26,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:26,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:26,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 08:43:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:26,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:43:26,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:26,918 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 08:43:26,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:26,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642077790] [2021-10-28 08:43:26,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:26,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013686202] [2021-10-28 08:43:26,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013686202] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:26,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:26,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 08:43:26,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930412519] [2021-10-28 08:43:26,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:43:26,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:26,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:43:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:43:26,925 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 08:43:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:26,966 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2021-10-28 08:43:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:43:26,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) Word has length 28 [2021-10-28 08:43:26,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:26,967 INFO L225 Difference]: With dead ends: 89 [2021-10-28 08:43:26,967 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 08:43:26,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:43:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 08:43:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-28 08:43:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 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 08:43:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2021-10-28 08:43:26,983 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 28 [2021-10-28 08:43:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:26,983 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2021-10-28 08:43:26,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 08:43:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2021-10-28 08:43:26,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 08:43:26,988 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:26,988 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:27,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:27,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 08:43:27,203 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash -134066994, now seen corresponding path program 1 times [2021-10-28 08:43:27,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:27,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000639214] [2021-10-28 08:43:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:27,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:27,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:27,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172142341] [2021-10-28 08:43:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:27,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:27,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:27,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:27,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 08:43:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:43:27,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:27,526 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 08:43:27,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:27,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000639214] [2021-10-28 08:43:27,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:27,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172142341] [2021-10-28 08:43:27,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172142341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:27,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:27,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 08:43:27,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554749185] [2021-10-28 08:43:27,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:43:27,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:27,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:43:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:43:27,529 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 08:43:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:27,705 INFO L93 Difference]: Finished difference Result 232 states and 266 transitions. [2021-10-28 08:43:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:43:27,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) Word has length 29 [2021-10-28 08:43:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:27,708 INFO L225 Difference]: With dead ends: 232 [2021-10-28 08:43:27,708 INFO L226 Difference]: Without dead ends: 224 [2021-10-28 08:43:27,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:43:27,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-28 08:43:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 136. [2021-10-28 08:43:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.353846153846154) internal successors, (176), 135 states have internal predecessors, (176), 0 states have call successors, (0), 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 08:43:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2021-10-28 08:43:27,723 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 29 [2021-10-28 08:43:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:27,724 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2021-10-28 08:43:27,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 08:43:27,724 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2021-10-28 08:43:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 08:43:27,724 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:27,725 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:27,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:27,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 08:43:27,939 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:27,939 INFO L85 PathProgramCache]: Analyzing trace with hash 966792015, now seen corresponding path program 1 times [2021-10-28 08:43:27,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:27,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478929137] [2021-10-28 08:43:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:27,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:27,950 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:27,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957282990] [2021-10-28 08:43:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:27,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:27,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:27,952 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:27,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 08:43:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:43:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:28,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:28,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478929137] [2021-10-28 08:43:28,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:28,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957282990] [2021-10-28 08:43:28,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957282990] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:28,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:28,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 08:43:28,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061653843] [2021-10-28 08:43:28,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:43:28,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:28,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:43:28,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:43:28,238 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:28,282 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2021-10-28 08:43:28,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:43:28,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-28 08:43:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:28,289 INFO L225 Difference]: With dead ends: 179 [2021-10-28 08:43:28,289 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 08:43:28,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:43:28,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 08:43:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-10-28 08:43:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.3461538461538463) internal successors, (175), 135 states have internal predecessors, (175), 0 states have call successors, (0), 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 08:43:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2021-10-28 08:43:28,305 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 30 [2021-10-28 08:43:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:28,305 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2021-10-28 08:43:28,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2021-10-28 08:43:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 08:43:28,307 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:28,308 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:28,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:28,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:28,531 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:28,531 INFO L85 PathProgramCache]: Analyzing trace with hash 302394158, now seen corresponding path program 1 times [2021-10-28 08:43:28,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:28,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833570858] [2021-10-28 08:43:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:28,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:28,542 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:28,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962499009] [2021-10-28 08:43:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:28,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:28,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:28,543 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:28,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 08:43:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 08:43:28,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:29,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:29,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833570858] [2021-10-28 08:43:29,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:29,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962499009] [2021-10-28 08:43:29,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962499009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:29,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:29,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 08:43:29,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189089258] [2021-10-28 08:43:29,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:43:29,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:29,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:43:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:43:29,029 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:29,265 INFO L93 Difference]: Finished difference Result 173 states and 219 transitions. [2021-10-28 08:43:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:43:29,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-28 08:43:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:29,267 INFO L225 Difference]: With dead ends: 173 [2021-10-28 08:43:29,268 INFO L226 Difference]: Without dead ends: 171 [2021-10-28 08:43:29,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:43:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-28 08:43:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2021-10-28 08:43:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.3571428571428572) internal successors, (209), 159 states have internal predecessors, (209), 0 states have call successors, (0), 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 08:43:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 209 transitions. [2021-10-28 08:43:29,297 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 209 transitions. Word has length 32 [2021-10-28 08:43:29,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:29,298 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 209 transitions. [2021-10-28 08:43:29,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:29,298 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 209 transitions. [2021-10-28 08:43:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 08:43:29,298 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:29,299 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:29,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:29,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:29,519 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2001825622, now seen corresponding path program 1 times [2021-10-28 08:43:29,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:29,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198307332] [2021-10-28 08:43:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:29,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:29,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:29,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724094943] [2021-10-28 08:43:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:29,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:29,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:29,531 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:29,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 08:43:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:43:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:29,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:29,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198307332] [2021-10-28 08:43:29,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:29,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724094943] [2021-10-28 08:43:29,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724094943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:29,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:29,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 08:43:29,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711434666] [2021-10-28 08:43:29,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:43:29,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:29,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:43:29,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:43:29,867 INFO L87 Difference]: Start difference. First operand 160 states and 209 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 08:43:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:29,920 INFO L93 Difference]: Finished difference Result 269 states and 355 transitions. [2021-10-28 08:43:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:43:29,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-28 08:43:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:29,923 INFO L225 Difference]: With dead ends: 269 [2021-10-28 08:43:29,923 INFO L226 Difference]: Without dead ends: 171 [2021-10-28 08:43:29,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:43:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-28 08:43:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-10-28 08:43:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.3374233128834356) internal successors, (218), 168 states have internal predecessors, (218), 0 states have call successors, (0), 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 08:43:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 218 transitions. [2021-10-28 08:43:29,942 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 218 transitions. Word has length 34 [2021-10-28 08:43:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:29,942 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 218 transitions. [2021-10-28 08:43:29,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 08:43:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 218 transitions. [2021-10-28 08:43:29,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 08:43:29,943 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:29,944 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:29,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:30,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 08:43:30,159 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:30,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:30,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1456833039, now seen corresponding path program 1 times [2021-10-28 08:43:30,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:30,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550989342] [2021-10-28 08:43:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:30,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:30,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:30,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865879415] [2021-10-28 08:43:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:30,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:30,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:30,182 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:30,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 08:43:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 08:43:30,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:31,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:31,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550989342] [2021-10-28 08:43:31,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:31,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865879415] [2021-10-28 08:43:31,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865879415] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:31,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:31,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 08:43:31,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351371177] [2021-10-28 08:43:31,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:43:31,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:31,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:43:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:43:31,278 INFO L87 Difference]: Start difference. First operand 169 states and 218 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:31,544 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2021-10-28 08:43:31,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:43:31,545 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-28 08:43:31,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:31,546 INFO L225 Difference]: With dead ends: 180 [2021-10-28 08:43:31,546 INFO L226 Difference]: Without dead ends: 178 [2021-10-28 08:43:31,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:43:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-28 08:43:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 169. [2021-10-28 08:43:31,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.3251533742331287) internal successors, (216), 168 states have internal predecessors, (216), 0 states have call successors, (0), 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 08:43:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 216 transitions. [2021-10-28 08:43:31,562 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 216 transitions. Word has length 34 [2021-10-28 08:43:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:31,562 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 216 transitions. [2021-10-28 08:43:31,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 216 transitions. [2021-10-28 08:43:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 08:43:31,563 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:31,564 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:31,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:31,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 08:43:31,791 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash 142945620, now seen corresponding path program 1 times [2021-10-28 08:43:31,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:31,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242430610] [2021-10-28 08:43:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:31,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:31,804 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:31,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192693196] [2021-10-28 08:43:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:31,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:31,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:31,806 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:31,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 08:43:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:32,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 08:43:32,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:33,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:33,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242430610] [2021-10-28 08:43:33,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:33,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192693196] [2021-10-28 08:43:33,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192693196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:33,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:33,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 08:43:33,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041070084] [2021-10-28 08:43:33,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:43:33,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:33,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:43:33,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:43:33,911 INFO L87 Difference]: Start difference. First operand 169 states and 216 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:34,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:34,731 INFO L93 Difference]: Finished difference Result 197 states and 248 transitions. [2021-10-28 08:43:34,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:43:34,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-28 08:43:34,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:34,734 INFO L225 Difference]: With dead ends: 197 [2021-10-28 08:43:34,735 INFO L226 Difference]: Without dead ends: 195 [2021-10-28 08:43:34,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:43:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-10-28 08:43:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 169. [2021-10-28 08:43:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.312883435582822) internal successors, (214), 168 states have internal predecessors, (214), 0 states have call successors, (0), 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 08:43:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 214 transitions. [2021-10-28 08:43:34,758 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 214 transitions. Word has length 36 [2021-10-28 08:43:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:34,758 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 214 transitions. [2021-10-28 08:43:34,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 214 transitions. [2021-10-28 08:43:34,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 08:43:34,759 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:34,759 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:34,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:34,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 08:43:34,975 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:34,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1084150885, now seen corresponding path program 2 times [2021-10-28 08:43:34,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:34,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792947414] [2021-10-28 08:43:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:34,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:35,010 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:35,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55946246] [2021-10-28 08:43:35,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:43:35,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:35,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:35,014 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:35,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 08:43:35,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:43:35,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:43:35,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 08:43:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:35,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:35,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792947414] [2021-10-28 08:43:35,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:35,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55946246] [2021-10-28 08:43:35,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55946246] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:35,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:35,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 08:43:35,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657348891] [2021-10-28 08:43:35,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:43:35,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:35,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:43:35,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:43:35,847 INFO L87 Difference]: Start difference. First operand 169 states and 214 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:36,163 INFO L93 Difference]: Finished difference Result 184 states and 229 transitions. [2021-10-28 08:43:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:43:36,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-28 08:43:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:36,166 INFO L225 Difference]: With dead ends: 184 [2021-10-28 08:43:36,166 INFO L226 Difference]: Without dead ends: 182 [2021-10-28 08:43:36,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:43:36,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-28 08:43:36,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 170. [2021-10-28 08:43:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.3109756097560976) internal successors, (215), 169 states have internal predecessors, (215), 0 states have call successors, (0), 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 08:43:36,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 215 transitions. [2021-10-28 08:43:36,214 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 215 transitions. Word has length 36 [2021-10-28 08:43:36,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:36,215 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 215 transitions. [2021-10-28 08:43:36,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:36,215 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 215 transitions. [2021-10-28 08:43:36,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 08:43:36,216 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:36,216 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:36,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:36,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 08:43:36,435 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:36,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1970211809, now seen corresponding path program 1 times [2021-10-28 08:43:36,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:36,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025219043] [2021-10-28 08:43:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:36,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:36,447 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:36,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423194307] [2021-10-28 08:43:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:36,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:36,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:36,453 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:36,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 08:43:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:36,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 08:43:36,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:37,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:37,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025219043] [2021-10-28 08:43:37,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:37,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423194307] [2021-10-28 08:43:37,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423194307] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:37,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:37,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 08:43:37,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112499816] [2021-10-28 08:43:37,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:43:37,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:37,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:43:37,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:43:37,037 INFO L87 Difference]: Start difference. First operand 170 states and 215 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 08:43:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:37,088 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2021-10-28 08:43:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:43:37,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-28 08:43:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:37,091 INFO L225 Difference]: With dead ends: 181 [2021-10-28 08:43:37,091 INFO L226 Difference]: Without dead ends: 173 [2021-10-28 08:43:37,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:43:37,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-28 08:43:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-10-28 08:43:37,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 167 states have (on average 1.3053892215568863) internal successors, (218), 172 states have internal predecessors, (218), 0 states have call successors, (0), 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 08:43:37,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 218 transitions. [2021-10-28 08:43:37,112 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 218 transitions. Word has length 38 [2021-10-28 08:43:37,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:37,112 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 218 transitions. [2021-10-28 08:43:37,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 08:43:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 218 transitions. [2021-10-28 08:43:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 08:43:37,113 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:37,114 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:37,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:37,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:37,335 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:37,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:37,335 INFO L85 PathProgramCache]: Analyzing trace with hash -947205511, now seen corresponding path program 1 times [2021-10-28 08:43:37,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:37,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757206350] [2021-10-28 08:43:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:37,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:37,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:37,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878549881] [2021-10-28 08:43:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:37,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:37,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:37,349 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:37,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 08:43:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:37,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 08:43:37,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:39,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:39,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757206350] [2021-10-28 08:43:39,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:39,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878549881] [2021-10-28 08:43:39,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878549881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:39,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:39,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 08:43:39,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139658564] [2021-10-28 08:43:39,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:43:39,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:39,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:43:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:43:39,038 INFO L87 Difference]: Start difference. First operand 173 states and 218 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 08:43:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:39,599 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2021-10-28 08:43:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:43:39,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-10-28 08:43:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:39,601 INFO L225 Difference]: With dead ends: 217 [2021-10-28 08:43:39,601 INFO L226 Difference]: Without dead ends: 213 [2021-10-28 08:43:39,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:43:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-28 08:43:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 199. [2021-10-28 08:43:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.3212435233160622) internal successors, (255), 198 states have internal predecessors, (255), 0 states have call successors, (0), 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 08:43:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 255 transitions. [2021-10-28 08:43:39,637 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 255 transitions. Word has length 39 [2021-10-28 08:43:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:39,637 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 255 transitions. [2021-10-28 08:43:39,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 08:43:39,638 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 255 transitions. [2021-10-28 08:43:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 08:43:39,638 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:39,638 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:39,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:39,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:39,863 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:39,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:39,863 INFO L85 PathProgramCache]: Analyzing trace with hash 268729372, now seen corresponding path program 1 times [2021-10-28 08:43:39,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:39,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225983041] [2021-10-28 08:43:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:39,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:39,881 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:39,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201631368] [2021-10-28 08:43:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:39,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:39,883 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:39,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 08:43:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:40,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 08:43:40,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 08:43:40,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:40,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225983041] [2021-10-28 08:43:40,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:40,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201631368] [2021-10-28 08:43:40,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201631368] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:40,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:40,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 08:43:40,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528133167] [2021-10-28 08:43:40,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:43:40,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:40,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:43:40,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:43:40,706 INFO L87 Difference]: Start difference. First operand 199 states and 255 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:40,863 INFO L93 Difference]: Finished difference Result 247 states and 311 transitions. [2021-10-28 08:43:40,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:43:40,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-28 08:43:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:40,866 INFO L225 Difference]: With dead ends: 247 [2021-10-28 08:43:40,866 INFO L226 Difference]: Without dead ends: 239 [2021-10-28 08:43:40,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 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 08:43:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-10-28 08:43:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 226. [2021-10-28 08:43:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.3227272727272728) internal successors, (291), 225 states have internal predecessors, (291), 0 states have call successors, (0), 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 08:43:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 291 transitions. [2021-10-28 08:43:40,927 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 291 transitions. Word has length 41 [2021-10-28 08:43:40,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:40,927 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 291 transitions. [2021-10-28 08:43:40,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 291 transitions. [2021-10-28 08:43:40,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 08:43:40,928 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:40,928 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:40,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:41,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:41,155 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:41,155 INFO L85 PathProgramCache]: Analyzing trace with hash 170255994, now seen corresponding path program 2 times [2021-10-28 08:43:41,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:41,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035807456] [2021-10-28 08:43:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:41,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:41,173 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:41,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390445985] [2021-10-28 08:43:41,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:43:41,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:41,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:41,175 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:41,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 08:43:41,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:43:41,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:43:41,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 08:43:41,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:41,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:41,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035807456] [2021-10-28 08:43:41,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:41,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390445985] [2021-10-28 08:43:41,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390445985] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:41,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:41,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 08:43:41,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465682295] [2021-10-28 08:43:41,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:43:41,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:43:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:43:41,844 INFO L87 Difference]: Start difference. First operand 226 states and 291 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:41,908 INFO L93 Difference]: Finished difference Result 250 states and 317 transitions. [2021-10-28 08:43:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:43:41,909 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-28 08:43:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:41,911 INFO L225 Difference]: With dead ends: 250 [2021-10-28 08:43:41,911 INFO L226 Difference]: Without dead ends: 240 [2021-10-28 08:43:41,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:43:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-10-28 08:43:41,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-10-28 08:43:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 233 states have (on average 1.3090128755364807) internal successors, (305), 238 states have internal predecessors, (305), 0 states have call successors, (0), 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 08:43:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 305 transitions. [2021-10-28 08:43:41,939 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 305 transitions. Word has length 42 [2021-10-28 08:43:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:41,940 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 305 transitions. [2021-10-28 08:43:41,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 305 transitions. [2021-10-28 08:43:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 08:43:41,941 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:41,941 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:41,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:42,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:42,156 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:42,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1229525663, now seen corresponding path program 1 times [2021-10-28 08:43:42,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:42,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030208921] [2021-10-28 08:43:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:42,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:42,165 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:42,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024827960] [2021-10-28 08:43:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:42,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:42,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:42,187 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:42,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 08:43:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:42,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 08:43:42,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:42,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:42,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030208921] [2021-10-28 08:43:42,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:42,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024827960] [2021-10-28 08:43:42,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024827960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:42,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:42,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 08:43:42,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648841704] [2021-10-28 08:43:42,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:43:42,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:42,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:43:42,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:43:42,854 INFO L87 Difference]: Start difference. First operand 239 states and 305 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:42,932 INFO L93 Difference]: Finished difference Result 368 states and 482 transitions. [2021-10-28 08:43:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:43:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-28 08:43:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:42,936 INFO L225 Difference]: With dead ends: 368 [2021-10-28 08:43:42,937 INFO L226 Difference]: Without dead ends: 241 [2021-10-28 08:43:42,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:43:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-10-28 08:43:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-10-28 08:43:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 235 states have (on average 1.297872340425532) internal successors, (305), 240 states have internal predecessors, (305), 0 states have call successors, (0), 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 08:43:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 305 transitions. [2021-10-28 08:43:42,966 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 305 transitions. Word has length 44 [2021-10-28 08:43:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:42,966 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 305 transitions. [2021-10-28 08:43:42,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 305 transitions. [2021-10-28 08:43:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 08:43:42,968 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:42,968 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:43,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:43,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:43,195 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:43,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:43,195 INFO L85 PathProgramCache]: Analyzing trace with hash -613640578, now seen corresponding path program 2 times [2021-10-28 08:43:43,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:43,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747673484] [2021-10-28 08:43:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:43,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:43,207 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:43,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271018614] [2021-10-28 08:43:43,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:43:43,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:43,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:43,209 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:43,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 08:43:43,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:43:43,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:43:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:43:43,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:43,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:43,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747673484] [2021-10-28 08:43:43,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:43,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271018614] [2021-10-28 08:43:43,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271018614] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:43:43,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:43:43,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:43:43,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610082756] [2021-10-28 08:43:43,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:43:43,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:43,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:43:43,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:43:43,898 INFO L87 Difference]: Start difference. First operand 241 states and 305 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:44,004 INFO L93 Difference]: Finished difference Result 465 states and 602 transitions. [2021-10-28 08:43:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:43:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-28 08:43:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:44,009 INFO L225 Difference]: With dead ends: 465 [2021-10-28 08:43:44,009 INFO L226 Difference]: Without dead ends: 364 [2021-10-28 08:43:44,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 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 08:43:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-10-28 08:43:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 286. [2021-10-28 08:43:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.3107142857142857) internal successors, (367), 285 states have internal predecessors, (367), 0 states have call successors, (0), 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 08:43:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2021-10-28 08:43:44,053 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 46 [2021-10-28 08:43:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:44,054 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2021-10-28 08:43:44,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:44,054 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2021-10-28 08:43:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 08:43:44,055 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:44,055 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:44,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:44,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 08:43:44,271 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:44,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:44,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2041640631, now seen corresponding path program 1 times [2021-10-28 08:43:44,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:44,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551001984] [2021-10-28 08:43:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:44,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:44,282 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:44,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597292667] [2021-10-28 08:43:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:44,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:44,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:44,288 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:44,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 08:43:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:43:44,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 08:43:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:46,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:46,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551001984] [2021-10-28 08:43:46,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:46,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597292667] [2021-10-28 08:43:46,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597292667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:46,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:46,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 08:43:46,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812734188] [2021-10-28 08:43:46,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:43:46,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:43:46,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:43:46,482 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:47,090 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2021-10-28 08:43:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 08:43:47,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-28 08:43:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:47,094 INFO L225 Difference]: With dead ends: 306 [2021-10-28 08:43:47,095 INFO L226 Difference]: Without dead ends: 304 [2021-10-28 08:43:47,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:43:47,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-10-28 08:43:47,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 286. [2021-10-28 08:43:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.3035714285714286) internal successors, (365), 285 states have internal predecessors, (365), 0 states have call successors, (0), 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 08:43:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 365 transitions. [2021-10-28 08:43:47,136 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 365 transitions. Word has length 46 [2021-10-28 08:43:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:47,137 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 365 transitions. [2021-10-28 08:43:47,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 365 transitions. [2021-10-28 08:43:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 08:43:47,138 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:47,138 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:47,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:47,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 08:43:47,363 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:47,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1100435366, now seen corresponding path program 3 times [2021-10-28 08:43:47,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:47,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512297309] [2021-10-28 08:43:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:47,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:47,375 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:47,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215647983] [2021-10-28 08:43:47,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:43:47,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:47,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:47,389 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:47,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 08:43:48,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 08:43:48,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:43:48,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 08:43:48,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 08:43:48,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:48,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512297309] [2021-10-28 08:43:48,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:48,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215647983] [2021-10-28 08:43:48,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215647983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:48,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:48,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 08:43:48,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167544917] [2021-10-28 08:43:48,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:43:48,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:48,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:43:48,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:43:48,240 INFO L87 Difference]: Start difference. First operand 286 states and 365 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 08:43:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:48,353 INFO L93 Difference]: Finished difference Result 286 states and 365 transitions. [2021-10-28 08:43:48,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:43:48,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-28 08:43:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:48,356 INFO L225 Difference]: With dead ends: 286 [2021-10-28 08:43:48,356 INFO L226 Difference]: Without dead ends: 284 [2021-10-28 08:43:48,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:43:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-10-28 08:43:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 241. [2021-10-28 08:43:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.2584745762711864) internal successors, (297), 240 states have internal predecessors, (297), 0 states have call successors, (0), 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 08:43:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 297 transitions. [2021-10-28 08:43:48,398 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 297 transitions. Word has length 46 [2021-10-28 08:43:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:48,398 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 297 transitions. [2021-10-28 08:43:48,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 08:43:48,399 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 297 transitions. [2021-10-28 08:43:48,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 08:43:48,400 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:48,400 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:48,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:48,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:48,623 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:48,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:48,623 INFO L85 PathProgramCache]: Analyzing trace with hash -316772764, now seen corresponding path program 2 times [2021-10-28 08:43:48,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:48,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353635947] [2021-10-28 08:43:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:48,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:48,636 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:48,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341040310] [2021-10-28 08:43:48,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:43:48,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:48,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:48,642 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:48,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 08:43:49,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:43:49,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:43:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 08:43:49,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:50,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:50,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353635947] [2021-10-28 08:43:50,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:50,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341040310] [2021-10-28 08:43:50,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341040310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:50,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:50,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 08:43:50,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150209517] [2021-10-28 08:43:50,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:43:50,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:43:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:43:50,814 INFO L87 Difference]: Start difference. First operand 241 states and 297 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:52,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:52,402 INFO L93 Difference]: Finished difference Result 272 states and 333 transitions. [2021-10-28 08:43:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:43:52,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-28 08:43:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:52,405 INFO L225 Difference]: With dead ends: 272 [2021-10-28 08:43:52,405 INFO L226 Difference]: Without dead ends: 266 [2021-10-28 08:43:52,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:43:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-28 08:43:52,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2021-10-28 08:43:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.2568093385214008) internal successors, (323), 261 states have internal predecessors, (323), 0 states have call successors, (0), 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 08:43:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 323 transitions. [2021-10-28 08:43:52,441 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 323 transitions. Word has length 49 [2021-10-28 08:43:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:52,441 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 323 transitions. [2021-10-28 08:43:52,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 323 transitions. [2021-10-28 08:43:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 08:43:52,443 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:52,443 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:52,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:52,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:52,659 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:52,659 INFO L85 PathProgramCache]: Analyzing trace with hash -231890065, now seen corresponding path program 2 times [2021-10-28 08:43:52,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:52,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001090720] [2021-10-28 08:43:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:52,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:52,670 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:52,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637471703] [2021-10-28 08:43:52,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:43:52,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:52,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:52,675 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:52,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 08:43:53,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:43:53,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:43:53,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:43:53,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:43:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:43:53,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:43:53,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001090720] [2021-10-28 08:43:53,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:43:53,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637471703] [2021-10-28 08:43:53,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637471703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:43:53,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:43:53,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 08:43:53,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176409219] [2021-10-28 08:43:53,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:43:53,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:43:53,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:43:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:43:53,638 INFO L87 Difference]: Start difference. First operand 262 states and 323 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:53,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:43:53,742 INFO L93 Difference]: Finished difference Result 297 states and 361 transitions. [2021-10-28 08:43:53,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:43:53,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-28 08:43:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:43:53,745 INFO L225 Difference]: With dead ends: 297 [2021-10-28 08:43:53,746 INFO L226 Difference]: Without dead ends: 287 [2021-10-28 08:43:53,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:43:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-28 08:43:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2021-10-28 08:43:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.2437275985663083) internal successors, (347), 283 states have internal predecessors, (347), 0 states have call successors, (0), 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 08:43:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 347 transitions. [2021-10-28 08:43:53,786 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 347 transitions. Word has length 52 [2021-10-28 08:43:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:43:53,786 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 347 transitions. [2021-10-28 08:43:53,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:43:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 347 transitions. [2021-10-28 08:43:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 08:43:53,788 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:43:53,788 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:43:53,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 08:43:54,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 08:43:54,015 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:43:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:43:54,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1401161001, now seen corresponding path program 3 times [2021-10-28 08:43:54,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:43:54,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114044322] [2021-10-28 08:43:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:43:54,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:43:54,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:43:54,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029341993] [2021-10-28 08:43:54,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:43:54,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:43:54,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:43:54,111 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:43:54,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 08:44:31,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 08:44:31,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:44:31,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 08:44:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:45:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-28 08:45:44,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:45:44,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114044322] [2021-10-28 08:45:44,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:45:44,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029341993] [2021-10-28 08:45:44,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029341993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:45:44,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:45:44,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-28 08:45:44,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180091332] [2021-10-28 08:45:44,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 08:45:44,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:45:44,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 08:45:44,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=327, Unknown=5, NotChecked=0, Total=420 [2021-10-28 08:45:44,057 INFO L87 Difference]: Start difference. First operand 284 states and 347 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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 08:46:10,547 WARN L207 SmtUtils]: Spent 17.19 s on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-10-28 08:46:29,049 WARN L207 SmtUtils]: Spent 5.79 s on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-10-28 08:46:34,941 WARN L207 SmtUtils]: Spent 5.41 s on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2021-10-28 08:46:49,970 WARN L207 SmtUtils]: Spent 5.81 s on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-10-28 08:47:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:10,915 INFO L93 Difference]: Finished difference Result 350 states and 424 transitions. [2021-10-28 08:47:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 08:47:10,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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) Word has length 53 [2021-10-28 08:47:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:10,918 INFO L225 Difference]: With dead ends: 350 [2021-10-28 08:47:10,918 INFO L226 Difference]: Without dead ends: 340 [2021-10-28 08:47:10,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 121.2s TimeCoverageRelationStatistics Valid=417, Invalid=1138, Unknown=5, NotChecked=0, Total=1560 [2021-10-28 08:47:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-10-28 08:47:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 253. [2021-10-28 08:47:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 249 states have (on average 1.216867469879518) internal successors, (303), 252 states have internal predecessors, (303), 0 states have call successors, (0), 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 08:47:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 303 transitions. [2021-10-28 08:47:10,960 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 303 transitions. Word has length 53 [2021-10-28 08:47:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:10,961 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 303 transitions. [2021-10-28 08:47:10,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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 08:47:10,961 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 303 transitions. [2021-10-28 08:47:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 08:47:10,962 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:10,962 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:10,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-28 08:47:11,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 08:47:11,174 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:47:11,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:11,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1314219604, now seen corresponding path program 2 times [2021-10-28 08:47:11,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:11,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924232150] [2021-10-28 08:47:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:11,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:11,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:47:11,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18639038] [2021-10-28 08:47:11,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:47:11,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:11,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:11,197 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:11,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 08:47:12,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:47:12,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:47:12,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:47:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:47:12,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:12,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924232150] [2021-10-28 08:47:12,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:47:12,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18639038] [2021-10-28 08:47:12,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18639038] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:12,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:47:12,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 08:47:12,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741639805] [2021-10-28 08:47:12,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:47:12,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:47:12,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:47:12,393 INFO L87 Difference]: Start difference. First operand 253 states and 303 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:47:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:12,538 INFO L93 Difference]: Finished difference Result 419 states and 514 transitions. [2021-10-28 08:47:12,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:47:12,539 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-28 08:47:12,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:12,542 INFO L225 Difference]: With dead ends: 419 [2021-10-28 08:47:12,542 INFO L226 Difference]: Without dead ends: 273 [2021-10-28 08:47:12,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:47:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-10-28 08:47:12,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-10-28 08:47:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 269 states have (on average 1.2007434944237918) internal successors, (323), 272 states have internal predecessors, (323), 0 states have call successors, (0), 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 08:47:12,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 323 transitions. [2021-10-28 08:47:12,596 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 323 transitions. Word has length 54 [2021-10-28 08:47:12,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:12,596 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 323 transitions. [2021-10-28 08:47:12,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:47:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 323 transitions. [2021-10-28 08:47:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 08:47:12,602 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:12,602 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:12,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:12,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 08:47:12,819 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:47:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2103850292, now seen corresponding path program 2 times [2021-10-28 08:47:12,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:12,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783921593] [2021-10-28 08:47:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:12,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:12,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:47:12,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187653788] [2021-10-28 08:47:12,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:47:12,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:12,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:12,838 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:12,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 08:47:13,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:47:13,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:47:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:47:13,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:47:13,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:13,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783921593] [2021-10-28 08:47:13,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:47:13,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187653788] [2021-10-28 08:47:13,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187653788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:13,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:47:13,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 08:47:13,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863664623] [2021-10-28 08:47:13,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:47:13,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:13,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:47:13,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:47:14,000 INFO L87 Difference]: Start difference. First operand 273 states and 323 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 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 08:47:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:14,291 INFO L93 Difference]: Finished difference Result 482 states and 565 transitions. [2021-10-28 08:47:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:47:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-10-28 08:47:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:14,295 INFO L225 Difference]: With dead ends: 482 [2021-10-28 08:47:14,295 INFO L226 Difference]: Without dead ends: 472 [2021-10-28 08:47:14,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:47:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-10-28 08:47:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 315. [2021-10-28 08:47:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.2057877813504823) internal successors, (375), 314 states have internal predecessors, (375), 0 states have call successors, (0), 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 08:47:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 375 transitions. [2021-10-28 08:47:14,352 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 375 transitions. Word has length 55 [2021-10-28 08:47:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:14,352 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 375 transitions. [2021-10-28 08:47:14,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 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 08:47:14,353 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 375 transitions. [2021-10-28 08:47:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 08:47:14,354 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:14,354 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:14,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:14,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:14,575 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:47:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:14,575 INFO L85 PathProgramCache]: Analyzing trace with hash -827141901, now seen corresponding path program 1 times [2021-10-28 08:47:14,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:14,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280561102] [2021-10-28 08:47:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:14,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:14,589 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:47:14,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488177021] [2021-10-28 08:47:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:14,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:14,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:14,594 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:14,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 08:47:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:47:15,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 08:47:15,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-28 08:47:15,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:15,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280561102] [2021-10-28 08:47:15,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:47:15,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488177021] [2021-10-28 08:47:15,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488177021] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:47:15,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:47:15,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:47:15,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017102735] [2021-10-28 08:47:15,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:47:15,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:47:15,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:47:15,833 INFO L87 Difference]: Start difference. First operand 315 states and 375 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 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 08:47:16,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:16,081 INFO L93 Difference]: Finished difference Result 361 states and 424 transitions. [2021-10-28 08:47:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:47:16,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-10-28 08:47:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:16,084 INFO L225 Difference]: With dead ends: 361 [2021-10-28 08:47:16,084 INFO L226 Difference]: Without dead ends: 353 [2021-10-28 08:47:16,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:47:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-10-28 08:47:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 263. [2021-10-28 08:47:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.1737451737451738) internal successors, (304), 262 states have internal predecessors, (304), 0 states have call successors, (0), 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 08:47:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 304 transitions. [2021-10-28 08:47:16,137 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 304 transitions. Word has length 56 [2021-10-28 08:47:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:16,138 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 304 transitions. [2021-10-28 08:47:16,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 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 08:47:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 304 transitions. [2021-10-28 08:47:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 08:47:16,139 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:16,140 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:16,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:16,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:16,363 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:47:16,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:16,363 INFO L85 PathProgramCache]: Analyzing trace with hash -859252433, now seen corresponding path program 3 times [2021-10-28 08:47:16,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:16,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314511577] [2021-10-28 08:47:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:16,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:16,377 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:47:16,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712500730] [2021-10-28 08:47:16,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:47:16,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:16,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:16,379 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:16,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 08:47:17,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 08:47:17,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:47:17,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:47:17,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:47:17,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:17,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314511577] [2021-10-28 08:47:17,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:47:17,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712500730] [2021-10-28 08:47:17,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712500730] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:17,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:47:17,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 08:47:17,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901513787] [2021-10-28 08:47:17,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:47:17,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:17,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:47:17,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:47:17,768 INFO L87 Difference]: Start difference. First operand 263 states and 304 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 08:47:17,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:17,906 INFO L93 Difference]: Finished difference Result 468 states and 553 transitions. [2021-10-28 08:47:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:47:17,907 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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) Word has length 58 [2021-10-28 08:47:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:17,909 INFO L225 Difference]: With dead ends: 468 [2021-10-28 08:47:17,909 INFO L226 Difference]: Without dead ends: 313 [2021-10-28 08:47:17,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:47:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-10-28 08:47:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 301. [2021-10-28 08:47:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 297 states have (on average 1.1616161616161615) internal successors, (345), 300 states have internal predecessors, (345), 0 states have call successors, (0), 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 08:47:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 345 transitions. [2021-10-28 08:47:17,963 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 345 transitions. Word has length 58 [2021-10-28 08:47:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:17,963 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 345 transitions. [2021-10-28 08:47:17,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 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 08:47:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 345 transitions. [2021-10-28 08:47:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 08:47:17,964 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:17,964 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:17,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-28 08:47:18,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-28 08:47:18,165 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:47:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:18,165 INFO L85 PathProgramCache]: Analyzing trace with hash 798585380, now seen corresponding path program 3 times [2021-10-28 08:47:18,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:18,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623649920] [2021-10-28 08:47:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:18,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:18,182 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:47:18,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881061221] [2021-10-28 08:47:18,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 08:47:18,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:18,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:18,184 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:18,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 08:47:19,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 08:47:19,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:47:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 08:47:19,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:47:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:47:19,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:47:19,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623649920] [2021-10-28 08:47:19,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:47:19,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881061221] [2021-10-28 08:47:19,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881061221] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:47:19,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:47:19,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 08:47:19,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791644793] [2021-10-28 08:47:19,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:47:19,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:47:19,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:47:19,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:47:19,721 INFO L87 Difference]: Start difference. First operand 301 states and 345 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 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 08:47:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:47:19,857 INFO L93 Difference]: Finished difference Result 314 states and 360 transitions. [2021-10-28 08:47:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:47:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-10-28 08:47:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:47:19,860 INFO L225 Difference]: With dead ends: 314 [2021-10-28 08:47:19,860 INFO L226 Difference]: Without dead ends: 310 [2021-10-28 08:47:19,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:47:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-28 08:47:19,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2021-10-28 08:47:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.1568627450980393) internal successors, (354), 309 states have internal predecessors, (354), 0 states have call successors, (0), 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 08:47:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 354 transitions. [2021-10-28 08:47:19,925 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 354 transitions. Word has length 62 [2021-10-28 08:47:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:47:19,925 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 354 transitions. [2021-10-28 08:47:19,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 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 08:47:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 354 transitions. [2021-10-28 08:47:19,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-28 08:47:19,927 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:47:19,928 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:47:19,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 08:47:20,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 08:47:20,141 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:47:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:47:20,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1643788516, now seen corresponding path program 4 times [2021-10-28 08:47:20,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:47:20,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479490904] [2021-10-28 08:47:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:47:20,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:47:20,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:47:20,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967537168] [2021-10-28 08:47:20,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:47:20,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:47:20,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:47:20,162 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:47:20,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 08:48:17,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:48:17,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:17,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:48:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:17,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:17,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479490904] [2021-10-28 08:48:17,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:48:17,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967537168] [2021-10-28 08:48:17,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967537168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:17,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:48:17,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 08:48:17,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101391870] [2021-10-28 08:48:17,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:48:17,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:17,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:48:17,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:48:17,913 INFO L87 Difference]: Start difference. First operand 310 states and 354 transitions. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 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 08:48:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:18,063 INFO L93 Difference]: Finished difference Result 518 states and 607 transitions. [2021-10-28 08:48:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 08:48:18,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-10-28 08:48:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:18,067 INFO L225 Difference]: With dead ends: 518 [2021-10-28 08:48:18,067 INFO L226 Difference]: Without dead ends: 363 [2021-10-28 08:48:18,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:48:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-10-28 08:48:18,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 335. [2021-10-28 08:48:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 331 states have (on average 1.151057401812689) internal successors, (381), 334 states have internal predecessors, (381), 0 states have call successors, (0), 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 08:48:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 381 transitions. [2021-10-28 08:48:18,129 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 381 transitions. Word has length 68 [2021-10-28 08:48:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:18,129 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 381 transitions. [2021-10-28 08:48:18,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 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 08:48:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 381 transitions. [2021-10-28 08:48:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-28 08:48:18,130 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:18,131 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:18,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:18,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:18,331 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:48:18,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash 818815641, now seen corresponding path program 4 times [2021-10-28 08:48:18,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:18,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554802009] [2021-10-28 08:48:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:18,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:18,342 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:48:18,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377736289] [2021-10-28 08:48:18,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 08:48:18,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:18,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:18,344 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:18,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 08:48:22,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 08:48:22,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:22,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 08:48:22,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:22,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:22,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554802009] [2021-10-28 08:48:22,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:48:22,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377736289] [2021-10-28 08:48:22,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377736289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:22,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:48:22,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 08:48:22,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851848870] [2021-10-28 08:48:22,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:48:22,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:48:22,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:48:22,458 INFO L87 Difference]: Start difference. First operand 335 states and 381 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:48:22,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:22,563 INFO L93 Difference]: Finished difference Result 348 states and 396 transitions. [2021-10-28 08:48:22,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 08:48:22,563 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-10-28 08:48:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:22,565 INFO L225 Difference]: With dead ends: 348 [2021-10-28 08:48:22,565 INFO L226 Difference]: Without dead ends: 344 [2021-10-28 08:48:22,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:48:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-10-28 08:48:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-10-28 08:48:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 340 states have (on average 1.1470588235294117) internal successors, (390), 343 states have internal predecessors, (390), 0 states have call successors, (0), 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 08:48:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 390 transitions. [2021-10-28 08:48:22,626 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 390 transitions. Word has length 72 [2021-10-28 08:48:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:22,627 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 390 transitions. [2021-10-28 08:48:22,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:48:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 390 transitions. [2021-10-28 08:48:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-28 08:48:22,628 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:22,628 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:22,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:22,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:22,841 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:48:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:22,842 INFO L85 PathProgramCache]: Analyzing trace with hash -389368652, now seen corresponding path program 5 times [2021-10-28 08:48:22,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:22,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775937870] [2021-10-28 08:48:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:22,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:22,860 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:48:22,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778610411] [2021-10-28 08:48:22,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:48:22,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:22,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:22,862 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:22,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 08:48:24,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 08:48:24,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:24,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 08:48:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:24,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:24,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775937870] [2021-10-28 08:48:24,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:48:24,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778610411] [2021-10-28 08:48:24,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778610411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:24,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:48:24,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 08:48:24,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459360538] [2021-10-28 08:48:24,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:48:24,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:24,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:48:24,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:48:24,497 INFO L87 Difference]: Start difference. First operand 344 states and 390 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:48:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:24,648 INFO L93 Difference]: Finished difference Result 398 states and 449 transitions. [2021-10-28 08:48:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 08:48:24,649 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-28 08:48:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:24,650 INFO L225 Difference]: With dead ends: 398 [2021-10-28 08:48:24,651 INFO L226 Difference]: Without dead ends: 394 [2021-10-28 08:48:24,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:48:24,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-10-28 08:48:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 368. [2021-10-28 08:48:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 364 states have (on average 1.1456043956043955) internal successors, (417), 367 states have internal predecessors, (417), 0 states have call successors, (0), 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 08:48:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 417 transitions. [2021-10-28 08:48:24,738 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 417 transitions. Word has length 76 [2021-10-28 08:48:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:24,738 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 417 transitions. [2021-10-28 08:48:24,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:48:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 417 transitions. [2021-10-28 08:48:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-28 08:48:24,740 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:24,740 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:24,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:24,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 08:48:24,967 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:48:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:24,967 INFO L85 PathProgramCache]: Analyzing trace with hash 301152857, now seen corresponding path program 5 times [2021-10-28 08:48:24,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:24,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753085550] [2021-10-28 08:48:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:24,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:24,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:48:24,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702491477] [2021-10-28 08:48:24,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 08:48:24,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:24,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:24,988 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:25,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 08:48:26,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 08:48:26,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:26,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 08:48:26,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 8 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:26,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:26,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753085550] [2021-10-28 08:48:26,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:48:26,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702491477] [2021-10-28 08:48:26,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702491477] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:26,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:48:26,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 08:48:26,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746197311] [2021-10-28 08:48:26,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:48:26,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:26,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:48:26,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:48:26,786 INFO L87 Difference]: Start difference. First operand 368 states and 417 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 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 08:48:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:26,948 INFO L93 Difference]: Finished difference Result 555 states and 646 transitions. [2021-10-28 08:48:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 08:48:26,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-10-28 08:48:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:26,950 INFO L225 Difference]: With dead ends: 555 [2021-10-28 08:48:26,950 INFO L226 Difference]: Without dead ends: 400 [2021-10-28 08:48:26,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:48:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-10-28 08:48:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 378. [2021-10-28 08:48:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 374 states have (on average 1.13903743315508) internal successors, (426), 377 states have internal predecessors, (426), 0 states have call successors, (0), 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 08:48:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 426 transitions. [2021-10-28 08:48:26,997 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 426 transitions. Word has length 78 [2021-10-28 08:48:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:26,997 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 426 transitions. [2021-10-28 08:48:26,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 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 08:48:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 426 transitions. [2021-10-28 08:48:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 08:48:26,999 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:26,999 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:27,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:27,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 08:48:27,209 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:48:27,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:27,210 INFO L85 PathProgramCache]: Analyzing trace with hash 631448244, now seen corresponding path program 6 times [2021-10-28 08:48:27,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:27,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900719711] [2021-10-28 08:48:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:27,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:27,242 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:48:27,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33358960] [2021-10-28 08:48:27,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:48:27,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:27,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:27,246 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:27,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 08:48:28,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-28 08:48:28,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:28,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:48:28,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 11 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:28,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:28,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900719711] [2021-10-28 08:48:28,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:48:28,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33358960] [2021-10-28 08:48:28,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33358960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:28,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:48:28,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 08:48:28,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211895754] [2021-10-28 08:48:28,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:48:28,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:28,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:48:28,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:48:28,482 INFO L87 Difference]: Start difference. First operand 378 states and 426 transitions. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 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 08:48:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:28,643 INFO L93 Difference]: Finished difference Result 586 states and 679 transitions. [2021-10-28 08:48:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 08:48:28,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-10-28 08:48:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:28,645 INFO L225 Difference]: With dead ends: 586 [2021-10-28 08:48:28,645 INFO L226 Difference]: Without dead ends: 431 [2021-10-28 08:48:28,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:48:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-10-28 08:48:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 403. [2021-10-28 08:48:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 399 states have (on average 1.1353383458646618) internal successors, (453), 402 states have internal predecessors, (453), 0 states have call successors, (0), 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 08:48:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 453 transitions. [2021-10-28 08:48:28,715 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 453 transitions. Word has length 82 [2021-10-28 08:48:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:28,716 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 453 transitions. [2021-10-28 08:48:28,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 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 08:48:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 453 transitions. [2021-10-28 08:48:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 08:48:28,717 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:28,718 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:28,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:28,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 08:48:28,931 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:48:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:28,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1753648855, now seen corresponding path program 6 times [2021-10-28 08:48:28,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:28,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652245008] [2021-10-28 08:48:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:28,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:28,951 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:48:28,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509242175] [2021-10-28 08:48:28,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 08:48:28,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:28,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:28,953 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:28,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 08:48:29,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-28 08:48:29,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:48:29,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 08:48:29,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:48:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:48:30,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:48:30,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652245008] [2021-10-28 08:48:30,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 08:48:30,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509242175] [2021-10-28 08:48:30,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509242175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:48:30,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 08:48:30,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 08:48:30,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203361956] [2021-10-28 08:48:30,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:48:30,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:48:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:48:30,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:48:30,196 INFO L87 Difference]: Start difference. First operand 403 states and 453 transitions. Second operand has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 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 08:48:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:48:30,371 INFO L93 Difference]: Finished difference Result 416 states and 468 transitions. [2021-10-28 08:48:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 08:48:30,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-10-28 08:48:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:48:30,373 INFO L225 Difference]: With dead ends: 416 [2021-10-28 08:48:30,373 INFO L226 Difference]: Without dead ends: 412 [2021-10-28 08:48:30,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-10-28 08:48:30,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-10-28 08:48:30,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2021-10-28 08:48:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 408 states have (on average 1.1323529411764706) internal successors, (462), 411 states have internal predecessors, (462), 0 states have call successors, (0), 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 08:48:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 462 transitions. [2021-10-28 08:48:30,457 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 462 transitions. Word has length 86 [2021-10-28 08:48:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:48:30,458 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 462 transitions. [2021-10-28 08:48:30,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 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 08:48:30,458 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 462 transitions. [2021-10-28 08:48:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-28 08:48:30,460 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:48:30,460 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:30,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:30,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 08:48:30,675 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-28 08:48:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:48:30,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2078400471, now seen corresponding path program 7 times [2021-10-28 08:48:30,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:48:30,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698018407] [2021-10-28 08:48:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:48:30,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:48:30,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 08:48:30,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109475554] [2021-10-28 08:48:30,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 08:48:30,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:48:30,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:48:30,688 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:48:30,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 08:48:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:48:31,777 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:48:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:48:31,947 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:48:31,947 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:48:31,948 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:48:31,950 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:48:31,950 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:48:31,951 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:48:31,951 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:48:31,951 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:48:31,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-28 08:48:32,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 08:48:32,182 INFO L731 BasicCegarLoop]: Path program histogram: [7, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:48:32,185 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:48:32,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:48:32 BoogieIcfgContainer [2021-10-28 08:48:32,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:48:32,292 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:48:32,292 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:48:32,292 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:48:32,293 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:20" (3/4) ... [2021-10-28 08:48:32,295 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 08:48:32,394 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:48:32,394 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:48:32,395 INFO L168 Benchmark]: Toolchain (without parser) took 312666.17 ms. Allocated memory was 81.8 MB in the beginning and 251.7 MB in the end (delta: 169.9 MB). Free memory was 60.2 MB in the beginning and 155.2 MB in the end (delta: -95.1 MB). Peak memory consumption was 74.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:32,395 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 81.8 MB. Free memory was 59.3 MB in the beginning and 59.3 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:48:32,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.50 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 59.9 MB in the beginning and 73.7 MB in the end (delta: -13.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:32,396 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.53 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 71.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:32,396 INFO L168 Benchmark]: Boogie Preprocessor took 50.13 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 70.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:48:32,397 INFO L168 Benchmark]: RCFGBuilder took 504.26 ms. Allocated memory is still 98.6 MB. Free memory was 70.5 MB in the beginning and 59.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:32,397 INFO L168 Benchmark]: TraceAbstraction took 311553.85 ms. Allocated memory was 98.6 MB in the beginning and 251.7 MB in the end (delta: 153.1 MB). Free memory was 58.5 MB in the beginning and 163.6 MB in the end (delta: -105.1 MB). Peak memory consumption was 55.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:32,398 INFO L168 Benchmark]: Witness Printer took 102.20 ms. Allocated memory is still 251.7 MB. Free memory was 163.6 MB in the beginning and 155.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 08:48:32,400 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 81.8 MB. Free memory was 59.3 MB in the beginning and 59.3 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 361.50 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 59.9 MB in the beginning and 73.7 MB in the end (delta: -13.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 83.53 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 71.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.13 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 70.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 504.26 ms. Allocated memory is still 98.6 MB. Free memory was 70.5 MB in the beginning and 59.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 311553.85 ms. Allocated memory was 98.6 MB in the beginning and 251.7 MB in the end (delta: 153.1 MB). Free memory was 58.5 MB in the beginning and 163.6 MB in the end (delta: -105.1 MB). Peak memory consumption was 55.7 MB. Max. memory is 16.1 GB. * Witness Printer took 102.20 ms. Allocated memory is still 251.7 MB. Free memory was 163.6 MB in the beginning and 155.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 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: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L40] EXPR counter++ VAL [counter=1] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=1] [L46] EXPR counter++ VAL [counter=2] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L51] COND TRUE !(c >= b) VAL [counter=2] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=2] [L40] EXPR counter++ VAL [counter=3] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=3] [L46] EXPR counter++ VAL [counter=4] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [counter=4] [L46] EXPR counter++ VAL [counter=5] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L51] COND TRUE !(c >= b) VAL [counter=5] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=5] [L40] EXPR counter++ VAL [counter=6] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=6] [L46] EXPR counter++ VAL [counter=7] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=7] [L11] COND FALSE !(!(cond)) VAL [counter=7] [L11] COND FALSE !(!(cond)) VAL [counter=7] [L11] COND FALSE !(!(cond)) VAL [counter=7] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [counter=7] [L46] EXPR counter++ VAL [counter=8] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=8] [L11] COND FALSE !(!(cond)) VAL [counter=8] [L11] COND FALSE !(!(cond)) VAL [counter=8] [L11] COND FALSE !(!(cond)) VAL [counter=8] [L51] COND TRUE !(c >= b) VAL [counter=8] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=8] [L40] EXPR counter++ VAL [counter=9] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=9] [L46] EXPR counter++ VAL [counter=10] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=10] [L11] COND FALSE !(!(cond)) VAL [counter=10] [L11] COND FALSE !(!(cond)) VAL [counter=10] [L11] COND FALSE !(!(cond)) VAL [counter=10] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [counter=10] [L46] EXPR counter++ VAL [counter=11] [L46] COND FALSE !(counter++<10) [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=11] [L40] EXPR counter++ VAL [counter=12] [L40] COND FALSE !(counter++<10) [L11] COND TRUE !(cond) VAL [counter=12] [L13] reach_error() VAL [counter=12] - UnprovableResult [Line: 13]: 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: 13]: 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: 13]: 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: 13]: 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: 13]: 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, 43 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 311.3s, OverallIterations: 40, TraceHistogramMax: 7, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 95.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1497 SDtfs, 2773 SDslu, 5333 SDs, 0 SdLazy, 3233 SolverSat, 613 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1802 GetRequests, 1377 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 125.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=412occurred in iteration=39, InterpolantAutomatonStates: 435, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 39 MinimizatonAttempts, 874 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 98.7s SatisfiabilityAnalysisTime, 86.6s InterpolantComputationTime, 1758 NumberOfCodeBlocks, 1714 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 1627 ConstructedInterpolants, 0 QuantifiedInterpolants, 10259 SizeOfPredicates, 294 NumberOfNonLiveVariables, 7234 ConjunctsInSsa, 723 ConjunctsInUnsatCore, 39 InterpolantComputations, 10 PerfectInterpolantSequences, 242/1370 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 08:48:32,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e328681-b8ae-41f7-812a-f85028cc0d94/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...