./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/hard2.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_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/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_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/hard2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/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_ec87765d-30c2-46c3-ad02-29712b943175/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 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 --- 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 11:03:01,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:03:01,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:03:01,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:03:01,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:03:01,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:03:01,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:03:01,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:03:01,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:03:01,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:03:01,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:03:01,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:03:01,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:03:01,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:03:01,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:03:01,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:03:01,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:03:01,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:03:01,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:03:01,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:03:01,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:03:01,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:03:01,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:03:01,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:03:01,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:03:01,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:03:01,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:03:01,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:03:01,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:03:01,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:03:01,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:03:01,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:03:01,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:03:01,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:03:01,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:03:01,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:03:01,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:03:01,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:03:01,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:03:01,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:03:01,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:03:01,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:03:01,480 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:03:01,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:03:01,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:03:01,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:03:01,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:03:01,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:03:01,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:03:01,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:03:01,484 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:03:01,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:03:01,486 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:03:01,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:03:01,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:03:01,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:03:01,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:03:01,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:03:01,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:03:01,488 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:03:01,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:03:01,488 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:03:01,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:03:01,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:03:01,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:03:01,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:03:01,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:03:01,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:03:01,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:03:01,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:03:01,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:03:01,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:03:01,516 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:03:01,516 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:03:01,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:03:01,517 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_ec87765d-30c2-46c3-ad02-29712b943175/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 [2022-10-17 11:03:01,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:03:01,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:03:01,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:03:01,801 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:03:01,802 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:03:01,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/nla-digbench/hard2.c [2022-10-17 11:03:01,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/data/8ec1f604c/4c827966cc9946439981870cd29681bf/FLAG225bedbb2 [2022-10-17 11:03:02,334 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:03:02,334 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/sv-benchmarks/c/nla-digbench/hard2.c [2022-10-17 11:03:02,339 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/data/8ec1f604c/4c827966cc9946439981870cd29681bf/FLAG225bedbb2 [2022-10-17 11:03:02,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/data/8ec1f604c/4c827966cc9946439981870cd29681bf [2022-10-17 11:03:02,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:03:02,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:03:02,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:03:02,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:03:02,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:03:02,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:02,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e87bf7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02, skipping insertion in model container [2022-10-17 11:03:02,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:02,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:03:02,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:03:02,895 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_ec87765d-30c2-46c3-ad02-29712b943175/sv-benchmarks/c/nla-digbench/hard2.c[526,539] [2022-10-17 11:03:02,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:03:02,917 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:03:02,929 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_ec87765d-30c2-46c3-ad02-29712b943175/sv-benchmarks/c/nla-digbench/hard2.c[526,539] [2022-10-17 11:03:02,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:03:02,948 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:03:02,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02 WrapperNode [2022-10-17 11:03:02,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:03:02,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:03:02,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:03:02,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:03:02,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:02,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:02,982 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-10-17 11:03:02,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:03:02,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:03:02,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:03:02,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:03:02,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:02,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:02,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:02,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:02,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:03,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:03,002 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:03,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:03,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:03:03,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:03:03,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:03:03,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:03:03,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (1/1) ... [2022-10-17 11:03:03,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:03:03,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:03:03,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:03:03,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:03:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:03:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:03:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:03:03,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:03:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 11:03:03,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 11:03:03,146 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:03:03,148 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:03:03,301 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:03:03,307 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:03:03,307 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 11:03:03,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:03:03 BoogieIcfgContainer [2022-10-17 11:03:03,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:03:03,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:03:03,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:03:03,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:03:03,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:03:02" (1/3) ... [2022-10-17 11:03:03,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfe945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:03:03, skipping insertion in model container [2022-10-17 11:03:03,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:03:02" (2/3) ... [2022-10-17 11:03:03,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cfe945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:03:03, skipping insertion in model container [2022-10-17 11:03:03,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:03:03" (3/3) ... [2022-10-17 11:03:03,318 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2.c [2022-10-17 11:03:03,336 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:03:03,336 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:03:03,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:03:03,398 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;@4a99d445, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:03:03,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 11:03:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 11:03:03,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 11:03:03,410 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:03,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:03:03,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1812186719, now seen corresponding path program 1 times [2022-10-17 11:03:03,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:03,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932120859] [2022-10-17 11:03:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:03,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:03,759 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 11:03:03,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:03,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932120859] [2022-10-17 11:03:03,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932120859] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:03:03,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:03:03,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:03:03,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035459637] [2022-10-17 11:03:03,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:03:03,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:03:03,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:03,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:03:03,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:03:03,808 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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 11:03:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:03:03,907 INFO L93 Difference]: Finished difference Result 61 states and 105 transitions. [2022-10-17 11:03:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:03:03,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2022-10-17 11:03:03,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:03:03,918 INFO L225 Difference]: With dead ends: 61 [2022-10-17 11:03:03,918 INFO L226 Difference]: Without dead ends: 31 [2022-10-17 11:03:03,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:03:03,928 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:03:03,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 104 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:03:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-10-17 11:03:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-10-17 11:03:03,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-17 11:03:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-10-17 11:03:03,974 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 7 [2022-10-17 11:03:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:03:03,974 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-10-17 11:03:03,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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 11:03:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-10-17 11:03:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 11:03:03,976 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:03,976 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:03:03,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:03:03,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:03,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:03,977 INFO L85 PathProgramCache]: Analyzing trace with hash 876512919, now seen corresponding path program 1 times [2022-10-17 11:03:03,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:03,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982568016] [2022-10-17 11:03:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:03,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:04,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 11:03:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:03:04,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982568016] [2022-10-17 11:03:04,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982568016] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:03:04,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:03:04,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:03:04,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380397314] [2022-10-17 11:03:04,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:03:04,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:03:04,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:03:04,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:03:04,160 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 11:03:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:03:04,247 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-10-17 11:03:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:03:04,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-10-17 11:03:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:03:04,251 INFO L225 Difference]: With dead ends: 37 [2022-10-17 11:03:04,251 INFO L226 Difference]: Without dead ends: 35 [2022-10-17 11:03:04,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:03:04,254 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:03:04,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:03:04,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-17 11:03:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-10-17 11:03:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-17 11:03:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-10-17 11:03:04,273 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 12 [2022-10-17 11:03:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:03:04,273 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-10-17 11:03:04,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 11:03:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-10-17 11:03:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 11:03:04,274 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:04,274 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:03:04,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:03:04,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:04,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:04,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2107096801, now seen corresponding path program 1 times [2022-10-17 11:03:04,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:04,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755347796] [2022-10-17 11:03:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:04,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:04,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:03:04,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027883115] [2022-10-17 11:03:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:04,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:03:04,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:03:04,303 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:03:04,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:03:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:04,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 11:03:04,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:03:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 11:03:04,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:03:04,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:04,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755347796] [2022-10-17 11:03:04,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:03:04,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027883115] [2022-10-17 11:03:04,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027883115] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:03:04,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:03:04,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:03:04,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001677112] [2022-10-17 11:03:04,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:03:04,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:03:04,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:03:04,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:03:04,470 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 11:03:04,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:03:04,542 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-10-17 11:03:04,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:03:04,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-10-17 11:03:04,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:03:04,544 INFO L225 Difference]: With dead ends: 56 [2022-10-17 11:03:04,544 INFO L226 Difference]: Without dead ends: 42 [2022-10-17 11:03:04,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:03:04,547 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:03:04,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 89 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:03:04,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-10-17 11:03:04,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-10-17 11:03:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 11:03:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-10-17 11:03:04,561 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 17 [2022-10-17 11:03:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:03:04,562 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-10-17 11:03:04,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 11:03:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-10-17 11:03:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 11:03:04,563 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:04,564 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:03:04,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-17 11:03:04,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-10-17 11:03:04,779 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:04,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2032872060, now seen corresponding path program 1 times [2022-10-17 11:03:04,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:04,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279535970] [2022-10-17 11:03:04,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:04,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:04,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:03:04,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373088488] [2022-10-17 11:03:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:04,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:03:04,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:03:04,794 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:03:04,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 11:03:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:04,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 11:03:04,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:03:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 11:03:04,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:03:04,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:04,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279535970] [2022-10-17 11:03:04,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:03:04,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373088488] [2022-10-17 11:03:04,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373088488] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:03:04,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:03:04,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:03:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335213277] [2022-10-17 11:03:04,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:03:04,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:03:04,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:03:04,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:03:04,924 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 11:03:05,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:03:05,021 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-10-17 11:03:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:03:05,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-10-17 11:03:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:03:05,026 INFO L225 Difference]: With dead ends: 55 [2022-10-17 11:03:05,027 INFO L226 Difference]: Without dead ends: 48 [2022-10-17 11:03:05,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 11:03:05,031 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:03:05,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 65 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:03:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-17 11:03:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-10-17 11:03:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-10-17 11:03:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-10-17 11:03:05,063 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 24 [2022-10-17 11:03:05,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:03:05,063 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-10-17 11:03:05,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 11:03:05,064 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-10-17 11:03:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 11:03:05,066 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:05,066 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-17 11:03:05,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 11:03:05,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:03:05,285 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:05,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:05,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1003977419, now seen corresponding path program 1 times [2022-10-17 11:03:05,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:05,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808453389] [2022-10-17 11:03:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:05,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:05,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:03:05,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735139265] [2022-10-17 11:03:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:05,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:03:05,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:03:05,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:03:05,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 11:03:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:05,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 11:03:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:03:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 11:03:05,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:03:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-10-17 11:03:05,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:05,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808453389] [2022-10-17 11:03:05,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:03:05,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735139265] [2022-10-17 11:03:05,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735139265] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 11:03:05,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:03:05,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-10-17 11:03:05,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503891042] [2022-10-17 11:03:05,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:03:05,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:03:05,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:05,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:03:05,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:03:05,642 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 11:03:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:03:06,035 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-10-17 11:03:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:03:06,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-10-17 11:03:06,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:03:06,038 INFO L225 Difference]: With dead ends: 59 [2022-10-17 11:03:06,038 INFO L226 Difference]: Without dead ends: 57 [2022-10-17 11:03:06,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 11:03:06,040 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 11:03:06,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 73 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 11:03:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-10-17 11:03:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-10-17 11:03:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-10-17 11:03:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-10-17 11:03:06,054 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 34 [2022-10-17 11:03:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:03:06,055 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-10-17 11:03:06,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 11:03:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-10-17 11:03:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-17 11:03:06,057 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:06,058 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:03:06,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 11:03:06,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:03:06,283 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:06,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1409666923, now seen corresponding path program 1 times [2022-10-17 11:03:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:06,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513899275] [2022-10-17 11:03:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:06,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:03:06,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549708341] [2022-10-17 11:03:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:06,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:03:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:03:06,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:03:06,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 11:03:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:06,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-17 11:03:06,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:03:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-10-17 11:03:06,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:03:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-10-17 11:03:08,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:08,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513899275] [2022-10-17 11:03:08,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:03:08,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549708341] [2022-10-17 11:03:08,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549708341] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:03:08,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 11:03:08,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-10-17 11:03:08,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821507866] [2022-10-17 11:03:08,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 11:03:08,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 11:03:08,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:08,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 11:03:08,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-10-17 11:03:08,015 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-10-17 11:03:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:03:13,648 INFO L93 Difference]: Finished difference Result 144 states and 200 transitions. [2022-10-17 11:03:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 11:03:13,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 54 [2022-10-17 11:03:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:03:13,651 INFO L225 Difference]: With dead ends: 144 [2022-10-17 11:03:13,651 INFO L226 Difference]: Without dead ends: 115 [2022-10-17 11:03:13,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-10-17 11:03:13,654 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:03:13,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 135 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 11:03:13,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-10-17 11:03:13,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2022-10-17 11:03:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 66 states have internal predecessors, (77), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-10-17 11:03:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2022-10-17 11:03:13,695 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 54 [2022-10-17 11:03:13,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:03:13,696 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2022-10-17 11:03:13,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-10-17 11:03:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2022-10-17 11:03:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-17 11:03:13,699 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:13,699 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:03:13,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 11:03:13,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 11:03:13,927 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash 135028242, now seen corresponding path program 1 times [2022-10-17 11:03:13,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:13,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656058283] [2022-10-17 11:03:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:13,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:13,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:03:13,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121032328] [2022-10-17 11:03:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:13,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:03:13,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:03:13,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:03:13,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 11:03:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:14,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2022-10-17 11:03:14,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:03:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-10-17 11:03:14,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:03:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-10-17 11:03:14,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:14,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656058283] [2022-10-17 11:03:14,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:03:14,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121032328] [2022-10-17 11:03:14,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121032328] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:03:14,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 11:03:14,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-10-17 11:03:14,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961386738] [2022-10-17 11:03:14,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 11:03:14,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 11:03:14,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:14,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 11:03:14,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-10-17 11:03:14,624 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 15 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-10-17 11:03:15,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:03:15,118 INFO L93 Difference]: Finished difference Result 159 states and 209 transitions. [2022-10-17 11:03:15,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 11:03:15,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) Word has length 65 [2022-10-17 11:03:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:03:15,120 INFO L225 Difference]: With dead ends: 159 [2022-10-17 11:03:15,121 INFO L226 Difference]: Without dead ends: 105 [2022-10-17 11:03:15,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-10-17 11:03:15,122 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 11:03:15,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 83 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 11:03:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-10-17 11:03:15,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2022-10-17 11:03:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 59 states have internal predecessors, (66), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-10-17 11:03:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-10-17 11:03:15,162 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 65 [2022-10-17 11:03:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:03:15,163 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-10-17 11:03:15,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-10-17 11:03:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-10-17 11:03:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-10-17 11:03:15,165 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:15,165 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:03:15,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 11:03:15,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:03:15,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1189112541, now seen corresponding path program 1 times [2022-10-17 11:03:15,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:15,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210483881] [2022-10-17 11:03:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:15,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:15,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:03:15,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733373549] [2022-10-17 11:03:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:15,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:03:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:03:15,401 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:03:15,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 11:03:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:03:15,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 11:03:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:03:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-10-17 11:03:15,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:03:15,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:15,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210483881] [2022-10-17 11:03:15,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:03:15,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733373549] [2022-10-17 11:03:15,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733373549] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:03:15,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:03:15,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:03:15,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579036536] [2022-10-17 11:03:15,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:03:15,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:03:15,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:15,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:03:15,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:03:15,529 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 11:03:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:03:15,608 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2022-10-17 11:03:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 11:03:15,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-10-17 11:03:15,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:03:15,610 INFO L225 Difference]: With dead ends: 105 [2022-10-17 11:03:15,610 INFO L226 Difference]: Without dead ends: 93 [2022-10-17 11:03:15,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:03:15,611 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:03:15,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 94 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:03:15,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-10-17 11:03:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-10-17 11:03:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-10-17 11:03:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-10-17 11:03:15,642 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 74 [2022-10-17 11:03:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:03:15,643 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-10-17 11:03:15,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 11:03:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-10-17 11:03:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-10-17 11:03:15,644 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:03:15,645 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-10-17 11:03:15,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-10-17 11:03:15,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:03:15,858 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:03:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:03:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2022890084, now seen corresponding path program 2 times [2022-10-17 11:03:15,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:03:15,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840286988] [2022-10-17 11:03:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:03:15,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:03:15,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 11:03:15,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469704489] [2022-10-17 11:03:15,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 11:03:15,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:03:15,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:03:15,875 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:03:15,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec87765d-30c2-46c3-ad02-29712b943175/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 11:03:15,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 11:03:15,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:03:15,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjunts are in the unsatisfiable core [2022-10-17 11:03:15,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:03:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-10-17 11:03:16,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:03:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-10-17 11:03:35,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:03:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840286988] [2022-10-17 11:03:35,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 11:03:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469704489] [2022-10-17 11:03:35,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469704489] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:03:35,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 11:03:35,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-10-17 11:03:35,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656224030] [2022-10-17 11:03:35,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 11:03:35,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 11:03:35,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:03:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 11:03:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=279, Unknown=1, NotChecked=0, Total=380 [2022-10-17 11:03:35,054 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26)