./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_09.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_09.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN --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 c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 --- 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-6b4ec56 [2022-11-20 09:29:11,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:29:11,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:29:11,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:29:11,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:29:11,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:29:11,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:29:11,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:29:11,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:29:11,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:29:11,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:29:11,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:29:11,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:29:11,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:29:11,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:29:11,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:29:11,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:29:11,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:29:11,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:29:11,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:29:11,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:29:11,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:29:11,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:29:11,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:29:11,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:29:11,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:29:11,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:29:11,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:29:11,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:29:11,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:29:11,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:29:11,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:29:11,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:29:11,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:29:11,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:29:11,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:29:11,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:29:11,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:29:11,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:29:11,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:29:11,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:29:11,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:29:11,289 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:29:11,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:29:11,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:29:11,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:29:11,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:29:11,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:29:11,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:29:11,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:29:11,292 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:29:11,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:29:11,293 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:29:11,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:29:11,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:29:11,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:29:11,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:29:11,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:29:11,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:29:11,295 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:29:11,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:29:11,295 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:29:11,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:29:11,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:29:11,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:29:11,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:29:11,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:29:11,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:29:11,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:29:11,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:29:11,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:29:11,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:29:11,298 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:29:11,298 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:29:11,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:29:11,299 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_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10901f6cd435bfce49587e6dcf9dfedb0e3885a1bcbcf1013c88383e8232647 [2022-11-20 09:29:11,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:29:11,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:29:11,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:29:11,621 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:29:11,621 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:29:11,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-11-20 09:29:15,031 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:29:15,308 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:29:15,309 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/sv-benchmarks/c/array-examples/standard_two_index_09.i [2022-11-20 09:29:15,317 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/data/bdee822d7/26a5f43a2cfd419c8c4025dc9607ebad/FLAG76eb4599e [2022-11-20 09:29:15,334 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/data/bdee822d7/26a5f43a2cfd419c8c4025dc9607ebad [2022-11-20 09:29:15,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:29:15,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:29:15,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:29:15,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:29:15,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:29:15,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d689252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15, skipping insertion in model container [2022-11-20 09:29:15,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:29:15,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:29:15,544 WARN L237 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_f48ebefb-7038-46d6-8f3b-f84f15c20d50/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] [2022-11-20 09:29:15,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:29:15,574 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:29:15,589 WARN L237 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_f48ebefb-7038-46d6-8f3b-f84f15c20d50/sv-benchmarks/c/array-examples/standard_two_index_09.i[814,827] [2022-11-20 09:29:15,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:29:15,614 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:29:15,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15 WrapperNode [2022-11-20 09:29:15,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:29:15,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:29:15,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:29:15,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:29:15,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,663 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-20 09:29:15,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:29:15,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:29:15,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:29:15,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:29:15,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,707 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:29:15,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:29:15,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:29:15,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:29:15,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (1/1) ... [2022-11-20 09:29:15,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:29:15,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:15,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:29:15,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:29:15,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:29:15,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:29:15,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:29:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:29:15,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:29:15,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:29:15,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 09:29:15,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:29:15,879 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:29:15,882 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:29:16,048 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:29:16,072 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:29:16,072 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 09:29:16,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:29:16 BoogieIcfgContainer [2022-11-20 09:29:16,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:29:16,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:29:16,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:29:16,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:29:16,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:29:15" (1/3) ... [2022-11-20 09:29:16,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71dad0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:29:16, skipping insertion in model container [2022-11-20 09:29:16,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:15" (2/3) ... [2022-11-20 09:29:16,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71dad0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:29:16, skipping insertion in model container [2022-11-20 09:29:16,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:29:16" (3/3) ... [2022-11-20 09:29:16,102 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2022-11-20 09:29:16,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:29:16,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:29:16,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:29:16,202 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;@1b4254ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:29:16,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 09:29:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 09:29:16,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:16,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:16,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:16,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:16,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2022-11-20 09:29:16,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:16,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612210061] [2022-11-20 09:29:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:16,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:16,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:16,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612210061] [2022-11-20 09:29:16,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612210061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:16,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:16,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:29:16,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615872490] [2022-11-20 09:29:16,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:16,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:16,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:16,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:16,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:16,659 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:16,719 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2022-11-20 09:29:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:16,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 09:29:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:16,732 INFO L225 Difference]: With dead ends: 28 [2022-11-20 09:29:16,732 INFO L226 Difference]: Without dead ends: 12 [2022-11-20 09:29:16,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:16,741 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:16,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:29:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-20 09:29:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-20 09:29:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-20 09:29:16,783 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-11-20 09:29:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:16,784 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-20 09:29:16,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-20 09:29:16,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 09:29:16,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:16,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:16,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:29:16,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:16,800 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2022-11-20 09:29:16,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:16,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56699415] [2022-11-20 09:29:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:16,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:17,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:17,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56699415] [2022-11-20 09:29:17,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56699415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:17,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320791087] [2022-11-20 09:29:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:17,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:17,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:17,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:17,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:29:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:17,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 09:29:17,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:29:17,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:29:17,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320791087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:17,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:29:17,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-20 09:29:17,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906720736] [2022-11-20 09:29:17,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:17,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:17,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:17,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:17,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:29:17,143 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:17,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:17,176 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-11-20 09:29:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:17,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 09:29:17,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:17,178 INFO L225 Difference]: With dead ends: 24 [2022-11-20 09:29:17,178 INFO L226 Difference]: Without dead ends: 18 [2022-11-20 09:29:17,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:29:17,180 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:17,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:29:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-20 09:29:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-11-20 09:29:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-20 09:29:17,189 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-11-20 09:29:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:17,190 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-20 09:29:17,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:17,190 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-20 09:29:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:29:17,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:17,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:17,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 09:29:17,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:17,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2022-11-20 09:29:17,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:17,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680481905] [2022-11-20 09:29:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:17,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:29:17,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:17,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680481905] [2022-11-20 09:29:17,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680481905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:17,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270182437] [2022-11-20 09:29:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:17,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:17,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:17,536 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:17,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:29:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:17,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:29:17,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:29:17,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:29:17,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270182437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:17,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:17,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 09:29:17,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490209230] [2022-11-20 09:29:17,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:17,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:29:17,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:17,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:29:17,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:29:17,717 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:17,776 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-11-20 09:29:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:29:17,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:29:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:17,778 INFO L225 Difference]: With dead ends: 36 [2022-11-20 09:29:17,778 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 09:29:17,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:29:17,781 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:17,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:29:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 09:29:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-11-20 09:29:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-20 09:29:17,788 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-11-20 09:29:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:17,789 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-20 09:29:17,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-20 09:29:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:29:17,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:17,790 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:17,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:17,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:17,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2022-11-20 09:29:17,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:17,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528303696] [2022-11-20 09:29:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:18,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 09:29:18,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:18,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528303696] [2022-11-20 09:29:18,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528303696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:18,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831333780] [2022-11-20 09:29:18,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:29:18,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:18,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:18,229 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:18,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:29:18,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:29:18,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:18,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 09:29:18,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:29:18,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:29:18,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831333780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:18,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:18,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-11-20 09:29:18,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133675591] [2022-11-20 09:29:18,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:18,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 09:29:18,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:18,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 09:29:18,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:29:18,503 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:18,625 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-11-20 09:29:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 09:29:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:29:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:18,627 INFO L225 Difference]: With dead ends: 57 [2022-11-20 09:29:18,628 INFO L226 Difference]: Without dead ends: 47 [2022-11-20 09:29:18,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:29:18,630 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:18,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:29:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-20 09:29:18,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2022-11-20 09:29:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-11-20 09:29:18,639 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2022-11-20 09:29:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:18,639 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-11-20 09:29:18,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:18,640 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-11-20 09:29:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 09:29:18,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:18,641 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:18,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:18,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:18,848 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1448090520, now seen corresponding path program 3 times [2022-11-20 09:29:18,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:18,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567564402] [2022-11-20 09:29:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:18,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 09:29:19,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:19,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567564402] [2022-11-20 09:29:19,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567564402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:19,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146680942] [2022-11-20 09:29:19,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:29:19,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:19,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:19,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:19,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:29:19,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:29:19,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:19,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 09:29:19,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 09:29:19,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 09:29:19,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146680942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:19,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:19,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-20 09:29:19,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799467453] [2022-11-20 09:29:19,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:19,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 09:29:19,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:19,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 09:29:19,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:29:19,505 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:19,725 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2022-11-20 09:29:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 09:29:19,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 09:29:19,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:19,727 INFO L225 Difference]: With dead ends: 85 [2022-11-20 09:29:19,727 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 09:29:19,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:29:19,730 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:19,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:29:19,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 09:29:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 33. [2022-11-20 09:29:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-11-20 09:29:19,747 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2022-11-20 09:29:19,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:19,748 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-11-20 09:29:19,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-11-20 09:29:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 09:29:19,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:19,750 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:19,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:19,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:19,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:19,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:19,951 INFO L85 PathProgramCache]: Analyzing trace with hash -798905000, now seen corresponding path program 4 times [2022-11-20 09:29:19,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:19,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077690965] [2022-11-20 09:29:19,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:19,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 09:29:20,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077690965] [2022-11-20 09:29:20,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077690965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988214334] [2022-11-20 09:29:20,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:29:20,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:20,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:20,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:20,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:29:20,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:29:20,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:20,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:29:20,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 09:29:20,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 09:29:21,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988214334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:21,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:21,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2022-11-20 09:29:21,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44074204] [2022-11-20 09:29:21,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:21,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 09:29:21,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 09:29:21,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 09:29:21,125 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:21,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:21,429 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2022-11-20 09:29:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 09:29:21,430 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 09:29:21,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:21,437 INFO L225 Difference]: With dead ends: 142 [2022-11-20 09:29:21,437 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 09:29:21,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 09:29:21,443 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 171 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:21,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 72 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:29:21,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 09:29:21,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 59. [2022-11-20 09:29:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-11-20 09:29:21,462 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 31 [2022-11-20 09:29:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:21,462 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-11-20 09:29:21,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-11-20 09:29:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 09:29:21,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:21,464 INFO L195 NwaCegarLoop]: trace histogram [35, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:21,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:21,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:21,665 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:21,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:21,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1918403063, now seen corresponding path program 5 times [2022-11-20 09:29:21,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:21,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237055632] [2022-11-20 09:29:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:21,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-11-20 09:29:22,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:22,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237055632] [2022-11-20 09:29:22,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237055632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384663186] [2022-11-20 09:29:22,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:29:22,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:22,365 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:22,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:31:38,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-11-20 09:31:38,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:38,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 09:31:38,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 09:31:39,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-20 09:31:40,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384663186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:40,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:40,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 38, 38] total 85 [2022-11-20 09:31:40,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293608966] [2022-11-20 09:31:40,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:40,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-11-20 09:31:40,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-11-20 09:31:40,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3569, Invalid=3571, Unknown=0, NotChecked=0, Total=7140 [2022-11-20 09:31:40,841 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 85 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:41,490 INFO L93 Difference]: Finished difference Result 222 states and 277 transitions. [2022-11-20 09:31:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-20 09:31:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-20 09:31:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:41,492 INFO L225 Difference]: With dead ends: 222 [2022-11-20 09:31:41,492 INFO L226 Difference]: Without dead ends: 201 [2022-11-20 09:31:41,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3891 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3569, Invalid=3571, Unknown=0, NotChecked=0, Total=7140 [2022-11-20 09:31:41,496 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 423 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:41,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 106 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:31:41,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-20 09:31:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 111. [2022-11-20 09:31:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-11-20 09:31:41,516 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 57 [2022-11-20 09:31:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:41,516 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-11-20 09:31:41,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 85 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-11-20 09:31:41,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 09:31:41,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:41,525 INFO L195 NwaCegarLoop]: trace histogram [82, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:41,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:41,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 09:31:41,726 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:41,727 INFO L85 PathProgramCache]: Analyzing trace with hash 25556088, now seen corresponding path program 6 times [2022-11-20 09:31:41,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:41,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596864143] [2022-11-20 09:31:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:41,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3574 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2022-11-20 09:31:42,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:42,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596864143] [2022-11-20 09:31:42,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596864143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:42,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554122061] [2022-11-20 09:31:42,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:31:42,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:42,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:42,990 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:43,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:35:56,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-11-20 09:35:56,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:57,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:35:57,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3574 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2022-11-20 09:35:57,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3574 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2022-11-20 09:35:57,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554122061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:57,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:57,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2022-11-20 09:35:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987618018] [2022-11-20 09:35:57,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:57,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 09:35:57,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:57,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 09:35:57,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 09:35:57,793 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:58,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:58,309 INFO L93 Difference]: Finished difference Result 323 states and 345 transitions. [2022-11-20 09:35:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 09:35:58,310 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-20 09:35:58,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:58,312 INFO L225 Difference]: With dead ends: 323 [2022-11-20 09:35:58,312 INFO L226 Difference]: Without dead ends: 317 [2022-11-20 09:35:58,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 09:35:58,314 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 456 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:58,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 127 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:35:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-11-20 09:35:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 131. [2022-11-20 09:35:58,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2022-11-20 09:35:58,331 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 109 [2022-11-20 09:35:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:58,332 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2022-11-20 09:35:58,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2022-11-20 09:35:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-20 09:35:58,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:58,334 INFO L195 NwaCegarLoop]: trace histogram [82, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:58,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:58,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:58,551 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:58,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash 936371448, now seen corresponding path program 7 times [2022-11-20 09:35:58,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:58,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728768131] [2022-11-20 09:35:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:58,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2022-11-20 09:36:01,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:01,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728768131] [2022-11-20 09:36:01,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728768131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:01,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340033058] [2022-11-20 09:36:01,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:36:01,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:01,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:01,495 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:01,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:36:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-20 09:36:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-11-20 09:36:03,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-11-20 09:36:10,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340033058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:10,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:10,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 85, 85] total 198 [2022-11-20 09:36:10,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148147065] [2022-11-20 09:36:10,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:10,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2022-11-20 09:36:10,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:10,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2022-11-20 09:36:10,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19502, Invalid=19504, Unknown=0, NotChecked=0, Total=39006 [2022-11-20 09:36:10,211 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 198 states, 198 states have (on average 1.106060606060606) internal successors, (219), 198 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:14,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:14,786 INFO L93 Difference]: Finished difference Result 546 states and 673 transitions. [2022-11-20 09:36:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-11-20 09:36:14,787 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 1.106060606060606) internal successors, (219), 198 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-11-20 09:36:14,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:14,789 INFO L225 Difference]: With dead ends: 546 [2022-11-20 09:36:14,789 INFO L226 Difference]: Without dead ends: 500 [2022-11-20 09:36:14,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22049 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=19502, Invalid=19504, Unknown=0, NotChecked=0, Total=39006 [2022-11-20 09:36:14,796 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1095 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 1036 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1036 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:14,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 264 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1036 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 09:36:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-20 09:36:14,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 255. [2022-11-20 09:36:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2022-11-20 09:36:14,826 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 129 [2022-11-20 09:36:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:14,827 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2022-11-20 09:36:14,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 1.106060606060606) internal successors, (219), 198 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2022-11-20 09:36:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-20 09:36:14,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:14,831 INFO L195 NwaCegarLoop]: trace histogram [195, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:14,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:15,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:15,039 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:36:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash -451983625, now seen corresponding path program 8 times [2022-11-20 09:36:15,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:15,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230027029] [2022-11-20 09:36:15,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:15,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20335 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2022-11-20 09:36:20,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:20,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230027029] [2022-11-20 09:36:20,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230027029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:20,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392902799] [2022-11-20 09:36:20,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:36:20,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:20,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:20,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:20,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 09:36:21,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:36:21,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:21,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 2265 conjuncts, 197 conjunts are in the unsatisfiable core [2022-11-20 09:36:21,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20335 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-11-20 09:36:24,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20335 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-11-20 09:36:50,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392902799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:50,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:50,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 198, 198] total 423 [2022-11-20 09:36:50,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842409491] [2022-11-20 09:36:50,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:50,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 423 states [2022-11-20 09:36:50,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:50,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 423 interpolants. [2022-11-20 09:36:50,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89252, Invalid=89254, Unknown=0, NotChecked=0, Total=178506 [2022-11-20 09:36:50,779 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand has 423 states, 423 states have (on average 1.0780141843971631) internal successors, (456), 423 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:19,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:19,828 INFO L93 Difference]: Finished difference Result 920 states and 1171 transitions. [2022-11-20 09:37:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 423 states. [2022-11-20 09:37:19,829 INFO L78 Accepts]: Start accepts. Automaton has has 423 states, 423 states have (on average 1.0780141843971631) internal successors, (456), 423 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-11-20 09:37:19,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:19,838 INFO L225 Difference]: With dead ends: 920 [2022-11-20 09:37:19,839 INFO L226 Difference]: Without dead ends: 863 [2022-11-20 09:37:19,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111051 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=89252, Invalid=89254, Unknown=0, NotChecked=0, Total=178506 [2022-11-20 09:37:19,851 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1459 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 1815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1815 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:19,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 469 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1815 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 09:37:19,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-20 09:37:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 503. [2022-11-20 09:37:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.0059760956175299) internal successors, (505), 502 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 505 transitions. [2022-11-20 09:37:19,901 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 505 transitions. Word has length 253 [2022-11-20 09:37:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:19,902 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 505 transitions. [2022-11-20 09:37:19,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 423 states, 423 states have (on average 1.0780141843971631) internal successors, (456), 423 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 505 transitions. [2022-11-20 09:37:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-11-20 09:37:19,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:19,917 INFO L195 NwaCegarLoop]: trace histogram [420, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:19,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:20,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:20,129 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:37:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:20,130 INFO L85 PathProgramCache]: Analyzing trace with hash 426629784, now seen corresponding path program 9 times [2022-11-20 09:37:20,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:20,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586355968] [2022-11-20 09:37:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:20,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 91038 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 88410 trivial. 0 not checked. [2022-11-20 09:37:31,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:31,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586355968] [2022-11-20 09:37:31,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586355968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:31,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742773946] [2022-11-20 09:37:31,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:37:31,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:31,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:31,700 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:31,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f48ebefb-7038-46d6-8f3b-f84f15c20d50/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process