./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 26517bdd67184dea6352cf50b6d9992d41ecfd853675bfc685354b90b7b5bf40 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:37:23,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:37:23,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:37:23,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:37:23,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:37:23,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:37:23,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:37:23,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:37:23,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:37:23,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:37:23,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:37:23,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:37:23,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:37:23,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:37:23,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:37:23,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:37:23,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:37:23,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:37:23,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:37:23,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:37:23,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:37:23,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:37:23,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:37:23,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:37:23,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:37:23,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:37:23,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:37:23,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:37:23,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:37:23,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:37:23,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:37:23,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:37:23,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:37:23,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:37:23,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:37:23,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:37:23,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:37:23,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:37:23,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:37:23,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:37:23,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:37:23,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:37:23,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:37:23,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:37:23,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:37:23,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:37:23,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:37:23,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:37:23,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:37:23,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:37:23,302 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:37:23,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:37:23,304 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:37:23,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:37:23,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:37:23,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:37:23,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:37:23,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:37:23,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:37:23,306 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:37:23,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:37:23,306 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:37:23,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:37:23,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:37:23,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:37:23,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:37:23,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:37:23,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:37:23,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:37:23,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:37:23,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:37:23,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:37:23,309 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:37:23,309 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:37:23,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:37:23,310 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_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26517bdd67184dea6352cf50b6d9992d41ecfd853675bfc685354b90b7b5bf40 [2022-10-17 10:37:23,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:37:23,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:37:23,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:37:23,652 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:37:23,653 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:37:23,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c [2022-10-17 10:37:23,722 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/data/c8070d068/5148f565f6db4070aaff748d38fa8d07/FLAG8430f385c [2022-10-17 10:37:24,155 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:37:24,156 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c [2022-10-17 10:37:24,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/data/c8070d068/5148f565f6db4070aaff748d38fa8d07/FLAG8430f385c [2022-10-17 10:37:24,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/data/c8070d068/5148f565f6db4070aaff748d38fa8d07 [2022-10-17 10:37:24,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:37:24,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:37:24,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:37:24,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:37:24,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:37:24,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f44a8ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24, skipping insertion in model container [2022-10-17 10:37:24,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:37:24,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:37:24,450 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c[525,538] [2022-10-17 10:37:24,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:37:24,517 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:37:24,532 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c[525,538] [2022-10-17 10:37:24,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:37:24,593 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:37:24,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24 WrapperNode [2022-10-17 10:37:24,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:37:24,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:37:24,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:37:24,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:37:24,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,663 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-10-17 10:37:24,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:37:24,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:37:24,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:37:24,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:37:24,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,688 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:37:24,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:37:24,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:37:24,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:37:24,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (1/1) ... [2022-10-17 10:37:24,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:37:24,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:37:24,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:37:24,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:37:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:37:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:37:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:37:24,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:37:24,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:37:24,786 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:37:24,858 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:37:24,861 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:37:25,143 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:37:25,163 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:37:25,164 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:37:25,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:37:25 BoogieIcfgContainer [2022-10-17 10:37:25,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:37:25,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:37:25,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:37:25,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:37:25,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:37:24" (1/3) ... [2022-10-17 10:37:25,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b97657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:37:25, skipping insertion in model container [2022-10-17 10:37:25,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:37:24" (2/3) ... [2022-10-17 10:37:25,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b97657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:37:25, skipping insertion in model container [2022-10-17 10:37:25,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:37:25" (3/3) ... [2022-10-17 10:37:25,192 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound10.c [2022-10-17 10:37:25,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:37:25,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:37:25,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:37:25,272 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;@2928cde0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:37:25,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:37:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:37:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:37:25,285 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:37:25,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:37:25,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:37:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:37:25,291 INFO L85 PathProgramCache]: Analyzing trace with hash -797370321, now seen corresponding path program 1 times [2022-10-17 10:37:25,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:37:25,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656601777] [2022-10-17 10:37:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:25,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:37:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:37:25,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:37:25,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656601777] [2022-10-17 10:37:25,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 10:37:25,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053386757] [2022-10-17 10:37:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:25,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:37:25,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:37:25,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:37:25,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:37:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:37:25,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 10:37:25,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:37:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:37:25,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:37:25,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053386757] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:37:25,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:37:25,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:37:25,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356925510] [2022-10-17 10:37:25,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:37:25,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:37:25,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:37:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:37:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:37:25,590 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:37:25,623 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2022-10-17 10:37:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:37:25,625 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 10:37:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:37:25,633 INFO L225 Difference]: With dead ends: 57 [2022-10-17 10:37:25,634 INFO L226 Difference]: Without dead ends: 26 [2022-10-17 10:37:25,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:37:25,644 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:37:25,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:37:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-10-17 10:37:25,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-10-17 10:37:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 10:37:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2022-10-17 10:37:25,699 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 10 [2022-10-17 10:37:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:37:25,700 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2022-10-17 10:37:25,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2022-10-17 10:37:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 10:37:25,702 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:37:25,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:37:25,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:37:25,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 10:37:25,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:37:25,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:37:25,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1698606518, now seen corresponding path program 1 times [2022-10-17 10:37:25,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:37:25,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336278884] [2022-10-17 10:37:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:25,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:37:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:37:25,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:37:25,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336278884] [2022-10-17 10:37:25,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 10:37:25,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314591459] [2022-10-17 10:37:25,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:25,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:37:25,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:37:25,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:37:25,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:37:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:37:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:37:26,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:37:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:37:26,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:37:26,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314591459] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:37:26,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:37:26,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:37:26,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75522247] [2022-10-17 10:37:26,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:37:26,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:37:26,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:37:26,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:37:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:37:26,153 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:37:26,176 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-10-17 10:37:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:37:26,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 10:37:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:37:26,178 INFO L225 Difference]: With dead ends: 47 [2022-10-17 10:37:26,179 INFO L226 Difference]: Without dead ends: 28 [2022-10-17 10:37:26,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:37:26,181 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:37:26,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:37:26,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-17 10:37:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-10-17 10:37:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 10:37:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2022-10-17 10:37:26,207 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 12 [2022-10-17 10:37:26,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:37:26,207 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2022-10-17 10:37:26,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2022-10-17 10:37:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 10:37:26,209 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:37:26,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:37:26,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-10-17 10:37:26,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:37:26,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:37:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:37:26,419 INFO L85 PathProgramCache]: Analyzing trace with hash 776097594, now seen corresponding path program 1 times [2022-10-17 10:37:26,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:37:26,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294757660] [2022-10-17 10:37:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:26,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:37:26,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:37:26,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903533561] [2022-10-17 10:37:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:26,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:37:26,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:37:26,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:37:26,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:37:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:37:26,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:37:26,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:37:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:37:26,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:37:26,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:37:26,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294757660] [2022-10-17 10:37:26,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:37:26,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903533561] [2022-10-17 10:37:26,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903533561] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:37:26,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:37:26,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:37:26,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597721849] [2022-10-17 10:37:26,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:37:26,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:37:26,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:37:26,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:37:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:37:26,557 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:37:26,587 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-10-17 10:37:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:37:26,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-17 10:37:26,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:37:26,589 INFO L225 Difference]: With dead ends: 41 [2022-10-17 10:37:26,589 INFO L226 Difference]: Without dead ends: 32 [2022-10-17 10:37:26,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:37:26,592 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:37:26,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:37:26,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-17 10:37:26,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-10-17 10:37:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 10:37:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2022-10-17 10:37:26,602 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 13 [2022-10-17 10:37:26,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:37:26,602 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2022-10-17 10:37:26,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:26,603 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2022-10-17 10:37:26,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 10:37:26,603 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:37:26,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:37:26,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:37:26,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:37:26,819 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:37:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:37:26,820 INFO L85 PathProgramCache]: Analyzing trace with hash 777587144, now seen corresponding path program 1 times [2022-10-17 10:37:26,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:37:26,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795540671] [2022-10-17 10:37:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:26,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:37:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:37:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:37:27,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:37:27,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795540671] [2022-10-17 10:37:27,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795540671] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:37:27,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:37:27,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:37:27,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33973694] [2022-10-17 10:37:27,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:37:27,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:37:27,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:37:27,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:37:27,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:37:27,545 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:30,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:37:32,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:37:34,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:37:36,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:37:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:37:36,619 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2022-10-17 10:37:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:37:36,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-17 10:37:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:37:36,621 INFO L225 Difference]: With dead ends: 64 [2022-10-17 10:37:36,622 INFO L226 Difference]: Without dead ends: 45 [2022-10-17 10:37:36,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:37:36,624 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:37:36,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 154 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 86 Invalid, 4 Unknown, 0 Unchecked, 9.0s Time] [2022-10-17 10:37:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-17 10:37:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-10-17 10:37:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-10-17 10:37:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2022-10-17 10:37:36,664 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2022-10-17 10:37:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:37:36,664 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2022-10-17 10:37:36,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2022-10-17 10:37:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 10:37:36,672 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:37:36,673 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:37:36,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:37:36,674 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:37:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:37:36,674 INFO L85 PathProgramCache]: Analyzing trace with hash 84493759, now seen corresponding path program 1 times [2022-10-17 10:37:36,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:37:36,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392265279] [2022-10-17 10:37:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:36,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:37:36,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:37:36,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085968580] [2022-10-17 10:37:36,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:36,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:37:36,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:37:36,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:37:36,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:37:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:37:36,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:37:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:37:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:37:36,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:37:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:37:36,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:37:36,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392265279] [2022-10-17 10:37:36,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:37:36,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085968580] [2022-10-17 10:37:36,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085968580] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:37:36,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:37:36,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-10-17 10:37:36,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998343127] [2022-10-17 10:37:36,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:37:36,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:37:36,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:37:36,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:37:36,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:37:36,847 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:42,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:37:42,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:37:42,635 INFO L93 Difference]: Finished difference Result 98 states and 142 transitions. [2022-10-17 10:37:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:37:42,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-17 10:37:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:37:42,639 INFO L225 Difference]: With dead ends: 98 [2022-10-17 10:37:42,639 INFO L226 Difference]: Without dead ends: 79 [2022-10-17 10:37:42,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:37:42,640 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 64 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-10-17 10:37:42,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 235 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-10-17 10:37:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-10-17 10:37:42,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2022-10-17 10:37:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-10-17 10:37:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-10-17 10:37:42,660 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 15 [2022-10-17 10:37:42,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:37:42,661 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-10-17 10:37:42,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-10-17 10:37:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:37:42,662 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:37:42,662 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:37:42,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:37:42,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:37:42,876 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:37:42,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:37:42,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2016757679, now seen corresponding path program 1 times [2022-10-17 10:37:42,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:37:42,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535599140] [2022-10-17 10:37:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:42,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:37:42,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:37:42,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951196371] [2022-10-17 10:37:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:42,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:37:42,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:37:42,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:37:42,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:37:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:37:42,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:37:42,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:37:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:37:43,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:37:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:37:43,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:37:43,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535599140] [2022-10-17 10:37:43,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:37:43,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951196371] [2022-10-17 10:37:43,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951196371] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:37:43,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:37:43,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-10-17 10:37:43,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99369158] [2022-10-17 10:37:43,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:37:43,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:37:43,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:37:43,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:37:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:37:43,093 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:45,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:37:47,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:37:56,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 10:37:58,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:37:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:37:58,360 INFO L93 Difference]: Finished difference Result 132 states and 188 transitions. [2022-10-17 10:37:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:37:58,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-17 10:37:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:37:58,364 INFO L225 Difference]: With dead ends: 132 [2022-10-17 10:37:58,364 INFO L226 Difference]: Without dead ends: 123 [2022-10-17 10:37:58,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:37:58,366 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 139 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 52 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:37:58,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 311 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 121 Invalid, 3 Unknown, 0 Unchecked, 15.2s Time] [2022-10-17 10:37:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-10-17 10:37:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2022-10-17 10:37:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 67 states have internal predecessors, (84), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-10-17 10:37:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 169 transitions. [2022-10-17 10:37:58,399 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 169 transitions. Word has length 16 [2022-10-17 10:37:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:37:58,399 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 169 transitions. [2022-10-17 10:37:58,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:37:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 169 transitions. [2022-10-17 10:37:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:37:58,400 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:37:58,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:37:58,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:37:58,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74faea1f-67e4-4228-9d79-388805452693/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:37:58,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:37:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:37:58,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2015268129, now seen corresponding path program 1 times [2022-10-17 10:37:58,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:37:58,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839601138] [2022-10-17 10:37:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:37:58,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:37:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:37:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 10:37:58,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:37:58,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839601138] [2022-10-17 10:37:58,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839601138] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:37:58,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:37:58,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:37:58,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175707463] [2022-10-17 10:37:58,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:37:58,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:37:58,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:37:58,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:37:58,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:37:58,961 INFO L87 Difference]: Start difference. First operand 114 states and 169 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:38:01,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:38:03,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:38:05,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:38:07,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []