./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ --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 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:40:39,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:40:39,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:40:39,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:40:39,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:40:39,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:40:39,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:40:39,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:40:39,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:40:39,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:40:39,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:40:39,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:40:39,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:40:39,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:40:39,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:40:39,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:40:39,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:40:39,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:40:39,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:40:39,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:40:39,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:40:39,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:40:39,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:40:39,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:40:39,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:40:39,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:40:39,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:40:39,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:40:39,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:40:39,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:40:39,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:40:39,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:40:39,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:40:39,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:40:39,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:40:39,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:40:39,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:40:39,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:40:39,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:40:39,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:40:39,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:40:39,225 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:40:39,268 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:40:39,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:40:39,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:40:39,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:40:39,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:40:39,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:40:39,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:40:39,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:40:39,272 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:40:39,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:40:39,273 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:40:39,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:40:39,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:40:39,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:40:39,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:40:39,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:40:39,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:40:39,276 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:40:39,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:40:39,276 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:40:39,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:40:39,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:40:39,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:40:39,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:40:39,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:40:39,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:40:39,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:40:39,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:40:39,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:40:39,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:40:39,281 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:40:39,281 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:40:39,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:40:39,282 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_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 [2022-10-17 10:40:39,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:40:39,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:40:39,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:40:39,663 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:40:39,663 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:40:39,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2022-10-17 10:40:39,752 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/data/4c3c01910/92b33b29239144e9a6d14e90eb852af2/FLAGf510b9977 [2022-10-17 10:40:40,148 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:40:40,149 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2022-10-17 10:40:40,160 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/data/4c3c01910/92b33b29239144e9a6d14e90eb852af2/FLAGf510b9977 [2022-10-17 10:40:40,176 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/data/4c3c01910/92b33b29239144e9a6d14e90eb852af2 [2022-10-17 10:40:40,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:40:40,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:40:40,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:40:40,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:40:40,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:40:40,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d6bd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40, skipping insertion in model container [2022-10-17 10:40:40,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:40:40,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:40:40,400 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i[950,963] [2022-10-17 10:40:40,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:40:40,425 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:40:40,437 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i[950,963] [2022-10-17 10:40:40,444 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:40:40,457 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:40:40,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40 WrapperNode [2022-10-17 10:40:40,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:40:40,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:40:40,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:40:40,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:40:40,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,500 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-10-17 10:40:40,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:40:40,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:40:40,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:40:40,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:40:40,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,538 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:40:40,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:40:40,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:40:40,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:40:40,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (1/1) ... [2022-10-17 10:40:40,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:40:40,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:40,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:40:40,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:40:40,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:40:40,638 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 10:40:40,638 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 10:40:40,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:40:40,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:40:40,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:40:40,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:40:40,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:40:40,707 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:40:40,709 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:40:40,883 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:40:40,889 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:40:40,889 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:40:40,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:40:40 BoogieIcfgContainer [2022-10-17 10:40:40,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:40:40,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:40:40,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:40:40,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:40:40,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:40:40" (1/3) ... [2022-10-17 10:40:40,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8ab447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:40:40, skipping insertion in model container [2022-10-17 10:40:40,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:40" (2/3) ... [2022-10-17 10:40:40,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8ab447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:40:40, skipping insertion in model container [2022-10-17 10:40:40,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:40:40" (3/3) ... [2022-10-17 10:40:40,902 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.i [2022-10-17 10:40:40,935 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:40:40,935 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:40:41,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:40:41,010 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@15d15031, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:40:41,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:40:41,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:40:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 10:40:41,024 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:41,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:41,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:41,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2022-10-17 10:40:41,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:41,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060229876] [2022-10-17 10:40:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:41,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:41,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060229876] [2022-10-17 10:40:41,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 10:40:41,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010767527] [2022-10-17 10:40:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:41,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:41,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:41,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:41,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:40:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:41,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 10:40:41,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:40:41,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:40:41,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010767527] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:40:41,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:40:41,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:40:41,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28491785] [2022-10-17 10:40:41,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:40:41,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:40:41,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:40:41,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:40:41,335 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:40:41,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:41,358 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-10-17 10:40:41,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:40:41,361 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-10-17 10:40:41,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:41,369 INFO L225 Difference]: With dead ends: 53 [2022-10-17 10:40:41,369 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 10:40:41,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:40:41,392 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:41,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:40:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 10:40:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-10-17 10:40:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:40:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-10-17 10:40:41,432 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2022-10-17 10:40:41,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:41,433 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-10-17 10:40:41,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:40:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-10-17 10:40:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 10:40:41,435 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:41,435 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:41,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:41,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 10:40:41,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:41,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2022-10-17 10:40:41,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:41,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839967883] [2022-10-17 10:40:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:41,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:41,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:40:41,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361806845] [2022-10-17 10:40:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:41,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:41,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:41,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:41,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:40:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:41,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:40:41,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:41,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:40:41,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:41,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839967883] [2022-10-17 10:40:41,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:40:41,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361806845] [2022-10-17 10:40:41,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361806845] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:40:41,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:40:41,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:40:41,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082671337] [2022-10-17 10:40:41,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:40:41,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:40:41,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:41,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:40:41,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:40:41,940 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:40:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:41,959 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-10-17 10:40:41,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:40:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-10-17 10:40:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:41,961 INFO L225 Difference]: With dead ends: 38 [2022-10-17 10:40:41,961 INFO L226 Difference]: Without dead ends: 26 [2022-10-17 10:40:41,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:40:41,964 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:41,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:40:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-10-17 10:40:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-10-17 10:40:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:40:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-10-17 10:40:41,972 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2022-10-17 10:40:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:41,974 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-10-17 10:40:41,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:40:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-10-17 10:40:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 10:40:41,976 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:41,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:42,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:42,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:42,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:42,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2022-10-17 10:40:42,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:42,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815005928] [2022-10-17 10:40:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:42,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:42,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:40:42,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23047409] [2022-10-17 10:40:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:42,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:42,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:42,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:42,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:40:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:42,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:40:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:40:42,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:43,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:43,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815005928] [2022-10-17 10:40:43,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:40:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23047409] [2022-10-17 10:40:43,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23047409] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:40:43,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:40:43,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-10-17 10:40:43,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847132131] [2022-10-17 10:40:43,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:40:43,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:40:43,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:40:43,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:40:43,259 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:40:45,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:40:47,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:40:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:47,496 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-10-17 10:40:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:40:47,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-10-17 10:40:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:47,591 INFO L225 Difference]: With dead ends: 38 [2022-10-17 10:40:47,591 INFO L226 Difference]: Without dead ends: 35 [2022-10-17 10:40:47,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:40:47,594 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:47,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 86 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-10-17 10:40:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-17 10:40:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-10-17 10:40:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:40:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-10-17 10:40:47,604 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2022-10-17 10:40:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:47,605 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-10-17 10:40:47,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:40:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-10-17 10:40:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 10:40:47,607 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:47,607 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:47,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:47,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:47,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2022-10-17 10:40:47,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:47,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720661763] [2022-10-17 10:40:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:47,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:47,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:40:47,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627322374] [2022-10-17 10:40:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:47,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:47,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:47,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:47,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:40:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:47,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:40:47,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:48,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:48,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:48,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720661763] [2022-10-17 10:40:48,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:40:48,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627322374] [2022-10-17 10:40:48,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627322374] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:40:48,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:40:48,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-10-17 10:40:48,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700826817] [2022-10-17 10:40:48,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:40:48,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:40:48,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:48,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:40:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:40:48,132 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:40:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:48,275 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2022-10-17 10:40:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:40:48,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2022-10-17 10:40:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:48,285 INFO L225 Difference]: With dead ends: 69 [2022-10-17 10:40:48,285 INFO L226 Difference]: Without dead ends: 57 [2022-10-17 10:40:48,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:40:48,292 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:48,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 106 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:40:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-17 10:40:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2022-10-17 10:40:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:40:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-10-17 10:40:48,316 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2022-10-17 10:40:48,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:48,318 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-10-17 10:40:48,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:40:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-10-17 10:40:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:40:48,320 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:48,320 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:48,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:48,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:48,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2022-10-17 10:40:48,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:48,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171882748] [2022-10-17 10:40:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:48,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:48,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:40:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800374223] [2022-10-17 10:40:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:48,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:48,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:48,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:48,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:40:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:48,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:40:48,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:40:48,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:49,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:49,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171882748] [2022-10-17 10:40:49,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:40:49,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800374223] [2022-10-17 10:40:49,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800374223] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:40:49,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:40:49,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-10-17 10:40:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439979679] [2022-10-17 10:40:49,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:40:49,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:40:49,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:40:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:40:49,290 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:40:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:49,331 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-10-17 10:40:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:40:49,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-10-17 10:40:49,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:49,334 INFO L225 Difference]: With dead ends: 53 [2022-10-17 10:40:49,335 INFO L226 Difference]: Without dead ends: 51 [2022-10-17 10:40:49,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:40:49,336 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:49,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 130 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-10-17 10:40:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-17 10:40:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-10-17 10:40:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 41 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:40:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-10-17 10:40:49,348 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 25 [2022-10-17 10:40:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:49,349 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-10-17 10:40:49,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:40:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-10-17 10:40:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:40:49,350 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:49,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:49,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:49,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:49,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:49,552 INFO L85 PathProgramCache]: Analyzing trace with hash -452755568, now seen corresponding path program 1 times [2022-10-17 10:40:49,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:49,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092659785] [2022-10-17 10:40:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:49,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:49,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:40:49,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830042924] [2022-10-17 10:40:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:49,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:49,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:49,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:49,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:40:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:49,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:40:49,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:49,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:49,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:49,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092659785] [2022-10-17 10:40:49,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:40:49,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830042924] [2022-10-17 10:40:49,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830042924] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:40:49,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:40:49,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-10-17 10:40:49,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065078007] [2022-10-17 10:40:49,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:40:49,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:40:49,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:40:49,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:40:49,776 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:40:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:49,965 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2022-10-17 10:40:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:40:49,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-10-17 10:40:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:49,970 INFO L225 Difference]: With dead ends: 124 [2022-10-17 10:40:49,970 INFO L226 Difference]: Without dead ends: 117 [2022-10-17 10:40:49,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:40:49,971 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 93 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:49,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 134 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:40:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-10-17 10:40:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2022-10-17 10:40:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 92 states have internal predecessors, (107), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:40:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2022-10-17 10:40:50,014 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 25 [2022-10-17 10:40:50,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:50,020 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2022-10-17 10:40:50,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:40:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2022-10-17 10:40:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-17 10:40:50,022 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:50,022 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:40:50,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:50,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:40:50,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:50,239 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2022-10-17 10:40:50,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287915434] [2022-10-17 10:40:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:50,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:50,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:40:50,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120971086] [2022-10-17 10:40:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:50,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:50,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:50,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:50,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:40:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:40:50,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:50,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:40:50,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:50,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287915434] [2022-10-17 10:40:50,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:40:50,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120971086] [2022-10-17 10:40:50,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120971086] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:40:50,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:40:50,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:40:50,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099750893] [2022-10-17 10:40:50,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:40:50,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:40:50,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:40:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:40:50,348 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:40:50,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:50,393 INFO L93 Difference]: Finished difference Result 151 states and 185 transitions. [2022-10-17 10:40:50,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:40:50,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-10-17 10:40:50,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:50,400 INFO L225 Difference]: With dead ends: 151 [2022-10-17 10:40:50,400 INFO L226 Difference]: Without dead ends: 96 [2022-10-17 10:40:50,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:40:50,403 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:50,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:40:50,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-10-17 10:40:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-10-17 10:40:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 80 states have internal predecessors, (94), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:40:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2022-10-17 10:40:50,443 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 31 [2022-10-17 10:40:50,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:50,446 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2022-10-17 10:40:50,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:40:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2022-10-17 10:40:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-17 10:40:50,448 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:50,448 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 10:40:50,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:50,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 10:40:50,672 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:50,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1505101988, now seen corresponding path program 1 times [2022-10-17 10:40:50,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:50,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117258188] [2022-10-17 10:40:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:50,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:50,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:40:50,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465500995] [2022-10-17 10:40:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:50,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:50,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:50,688 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:50,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:40:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:50,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:40:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:40:50,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:40:50,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:50,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117258188] [2022-10-17 10:40:50,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:40:50,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465500995] [2022-10-17 10:40:50,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465500995] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:40:50,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:40:50,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-10-17 10:40:50,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734499439] [2022-10-17 10:40:50,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:40:50,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:40:50,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:50,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:40:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:40:50,939 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:40:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:51,056 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2022-10-17 10:40:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:40:51,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-10-17 10:40:51,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:51,058 INFO L225 Difference]: With dead ends: 111 [2022-10-17 10:40:51,058 INFO L226 Difference]: Without dead ends: 91 [2022-10-17 10:40:51,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:40:51,059 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:51,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 105 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:40:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-17 10:40:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-10-17 10:40:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 76 states have internal predecessors, (88), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:40:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-10-17 10:40:51,082 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 31 [2022-10-17 10:40:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:51,082 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-10-17 10:40:51,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:40:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-10-17 10:40:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 10:40:51,090 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:51,090 INFO L195 NwaCegarLoop]: 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] [2022-10-17 10:40:51,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:51,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:51,304 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:51,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:51,305 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2022-10-17 10:40:51,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:51,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410631388] [2022-10-17 10:40:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:51,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:51,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:40:51,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832194071] [2022-10-17 10:40:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:51,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:51,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:51,334 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:51,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5df48dfd-44e9-4c42-a1ea-04065e43e738/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process