./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R --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 83a507b5a78977c4a0b48a152de77bd7eabcfca9b19b757436d28082e86741ee --- 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-38b53e6 [2022-11-25 15:27:26,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:27:26,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:27:26,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:27:26,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:27:26,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:27:26,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:27:26,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:27:26,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:27:26,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:27:26,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:27:26,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:27:26,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:27:26,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:27:26,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:27:26,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:27:26,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:27:26,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:27:26,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:27:26,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:27:26,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:27:26,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:27:26,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:27:26,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:27:26,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:27:26,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:27:26,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:27:26,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:27:26,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:27:26,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:27:26,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:27:26,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:27:26,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:27:26,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:27:26,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:27:26,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:27:26,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:27:26,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:27:26,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:27:26,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:27:26,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:27:26,517 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:27:26,560 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:27:26,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:27:26,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:27:26,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:27:26,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:27:26,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:27:26,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:27:26,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:27:26,563 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:27:26,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:27:26,565 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:27:26,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:27:26,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:27:26,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:27:26,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:27:26,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:27:26,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:27:26,567 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:27:26,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:27:26,567 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:27:26,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:27:26,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:27:26,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:27:26,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:27:26,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:27:26,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:27:26,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:27:26,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:27:26,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:27:26,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:27:26,570 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:27:26,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:27:26,570 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:27:26,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:27:26,571 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83a507b5a78977c4a0b48a152de77bd7eabcfca9b19b757436d28082e86741ee [2022-11-25 15:27:26,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:27:26,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:27:26,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:27:26,952 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:27:26,953 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:27:26,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c [2022-11-25 15:27:30,129 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:27:30,364 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:27:30,365 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c [2022-11-25 15:27:30,374 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/data/b2666d20b/f465c6c4a377448eb8e99e5d4d96feb1/FLAGefe7ca252 [2022-11-25 15:27:30,393 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/data/b2666d20b/f465c6c4a377448eb8e99e5d4d96feb1 [2022-11-25 15:27:30,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:27:30,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:27:30,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:27:30,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:27:30,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:27:30,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@617ba55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30, skipping insertion in model container [2022-11-25 15:27:30,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:27:30,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:27:30,594 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c[537,550] [2022-11-25 15:27:30,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:27:30,644 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:27:30,657 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound20.c[537,550] [2022-11-25 15:27:30,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:27:30,682 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:27:30,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30 WrapperNode [2022-11-25 15:27:30,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:27:30,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:27:30,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:27:30,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:27:30,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,722 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-25 15:27:30,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:27:30,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:27:30,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:27:30,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:27:30,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,742 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:27:30,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:27:30,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:27:30,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:27:30,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (1/1) ... [2022-11-25 15:27:30,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:27:30,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:27:30,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:27:30,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:27:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:27:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 15:27:30,845 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 15:27:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:27:30,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:27:30,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:27:30,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 15:27:30,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 15:27:30,932 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:27:30,935 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:27:31,122 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:27:31,129 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:27:31,129 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 15:27:31,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:27:31 BoogieIcfgContainer [2022-11-25 15:27:31,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:27:31,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:27:31,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:27:31,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:27:31,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:27:30" (1/3) ... [2022-11-25 15:27:31,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3932dac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:27:31, skipping insertion in model container [2022-11-25 15:27:31,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:27:30" (2/3) ... [2022-11-25 15:27:31,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3932dac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:27:31, skipping insertion in model container [2022-11-25 15:27:31,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:27:31" (3/3) ... [2022-11-25 15:27:31,142 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.c [2022-11-25 15:27:31,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:27:31,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:27:31,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:27:31,240 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;@43fc536f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:27:31,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 15:27:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-25 15:27:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 15:27:31,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:27:31,255 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:31,256 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:27:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2022-11-25 15:27:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:31,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435480902] [2022-11-25 15:27:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:31,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:31,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:27:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:31,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:27:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:31,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:27:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 15:27:31,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:31,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435480902] [2022-11-25 15:27:31,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435480902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:31,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:31,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:27:31,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104008136] [2022-11-25 15:27:31,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:31,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:27:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:31,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:27:31,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:27:31,524 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:27:31,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:27:31,550 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2022-11-25 15:27:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:27:31,553 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-25 15:27:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:27:31,562 INFO L225 Difference]: With dead ends: 63 [2022-11-25 15:27:31,562 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 15:27:31,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:27:31,570 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:27:31,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:27:31,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 15:27:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-25 15:27:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 15:27:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-25 15:27:31,616 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-11-25 15:27:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:27:31,617 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-25 15:27:31,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:27:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-25 15:27:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 15:27:31,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:27:31,619 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:31,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:27:31,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:27:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:31,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2022-11-25 15:27:31,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:31,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608532145] [2022-11-25 15:27:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:31,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:32,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:27:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:32,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:27:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:32,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:27:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 15:27:32,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:32,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608532145] [2022-11-25 15:27:32,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608532145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:32,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:32,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:27:32,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324038388] [2022-11-25 15:27:32,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:32,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:27:32,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:27:32,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:27:32,051 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 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) [2022-11-25 15:27:32,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:27:32,156 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-11-25 15:27:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:27:32,157 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), 2 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 [2022-11-25 15:27:32,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:27:32,158 INFO L225 Difference]: With dead ends: 42 [2022-11-25 15:27:32,159 INFO L226 Difference]: Without dead ends: 40 [2022-11-25 15:27:32,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:27:32,161 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:27:32,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:27:32,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-25 15:27:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-25 15:27:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 15:27:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-25 15:27:32,173 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2022-11-25 15:27:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:27:32,174 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-25 15:27:32,174 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), 2 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) [2022-11-25 15:27:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-25 15:27:32,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 15:27:32,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:27:32,176 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:32,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:27:32,176 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:27:32,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:32,177 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2022-11-25 15:27:32,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:32,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965588730] [2022-11-25 15:27:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:32,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:32,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:27:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:32,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:27:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:32,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:27:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:32,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:27:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 15:27:32,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965588730] [2022-11-25 15:27:32,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965588730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:32,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:32,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:27:32,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444488687] [2022-11-25 15:27:32,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:32,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:27:32,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:32,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:27:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:27:32,777 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 15:27:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:27:32,928 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2022-11-25 15:27:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:27:32,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-25 15:27:32,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:27:32,932 INFO L225 Difference]: With dead ends: 46 [2022-11-25 15:27:32,936 INFO L226 Difference]: Without dead ends: 44 [2022-11-25 15:27:32,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:27:32,938 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:27:32,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:27:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-25 15:27:32,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-11-25 15:27:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 15:27:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-25 15:27:32,969 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2022-11-25 15:27:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:27:32,969 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-25 15:27:32,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 15:27:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-25 15:27:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 15:27:32,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:27:32,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:32,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:27:32,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:27:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2022-11-25 15:27:32,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:32,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654329911] [2022-11-25 15:27:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:32,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:32,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:27:32,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439481404] [2022-11-25 15:27:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:32,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:32,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:27:33,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:27:33,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:27:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:33,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 15:27:33,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:27:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 15:27:33,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:27:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 15:27:33,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:33,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654329911] [2022-11-25 15:27:33,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:27:33,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439481404] [2022-11-25 15:27:33,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439481404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:27:33,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:27:33,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-25 15:27:33,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446371513] [2022-11-25 15:27:33,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:27:33,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:27:33,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:27:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:27:33,725 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 15:27:36,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:27:38,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:27:40,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:27:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:27:40,966 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2022-11-25 15:27:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:27:40,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 34 [2022-11-25 15:27:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:27:40,969 INFO L225 Difference]: With dead ends: 76 [2022-11-25 15:27:40,969 INFO L226 Difference]: Without dead ends: 62 [2022-11-25 15:27:40,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:27:40,971 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:27:40,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 164 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 3 Unknown, 0 Unchecked, 7.1s Time] [2022-11-25 15:27:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-25 15:27:40,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-25 15:27:40,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 38 states have internal predecessors, (39), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 15:27:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-11-25 15:27:40,993 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 34 [2022-11-25 15:27:40,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:27:40,993 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-11-25 15:27:40,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 15:27:40,994 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-11-25 15:27:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 15:27:40,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:27:40,995 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:41,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:27:41,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:41,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:27:41,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:41,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2022-11-25 15:27:41,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:41,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222119623] [2022-11-25 15:27:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:41,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:41,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:27:41,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529815911] [2022-11-25 15:27:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:41,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:41,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:27:41,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:27:41,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:27:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:41,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 15:27:41,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:27:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 15:27:41,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:27:41,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:41,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222119623] [2022-11-25 15:27:41,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:27:41,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529815911] [2022-11-25 15:27:41,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529815911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:27:41,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:27:41,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 15:27:41,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941262533] [2022-11-25 15:27:41,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:27:41,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:27:41,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:27:41,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:27:41,643 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 15:27:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:27:43,174 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-11-25 15:27:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:27:43,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-11-25 15:27:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:27:43,176 INFO L225 Difference]: With dead ends: 72 [2022-11-25 15:27:43,176 INFO L226 Difference]: Without dead ends: 61 [2022-11-25 15:27:43,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:27:43,177 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:27:43,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 147 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 15:27:43,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-25 15:27:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-25 15:27:43,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 15:27:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2022-11-25 15:27:43,198 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 41 [2022-11-25 15:27:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:27:43,199 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2022-11-25 15:27:43,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 15:27:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2022-11-25 15:27:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 15:27:43,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:27:43,201 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:43,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 15:27:43,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:43,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:27:43,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:43,408 INFO L85 PathProgramCache]: Analyzing trace with hash -421337323, now seen corresponding path program 1 times [2022-11-25 15:27:43,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:43,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702398346] [2022-11-25 15:27:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:43,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:43,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:27:43,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73527886] [2022-11-25 15:27:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:43,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:43,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:27:43,428 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:27:43,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:27:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:43,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 15:27:43,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:27:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-25 15:27:44,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:27:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 15:27:46,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:46,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702398346] [2022-11-25 15:27:46,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:27:46,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73527886] [2022-11-25 15:27:46,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73527886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:27:46,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:27:46,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-11-25 15:27:46,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520252437] [2022-11-25 15:27:46,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:27:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:27:46,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:27:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:27:46,092 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-25 15:27:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:27:49,365 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2022-11-25 15:27:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:27:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 58 [2022-11-25 15:27:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:27:49,368 INFO L225 Difference]: With dead ends: 76 [2022-11-25 15:27:49,368 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 15:27:49,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:27:49,369 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:27:49,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 106 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-25 15:27:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 15:27:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-11-25 15:27:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 47 states have internal predecessors, (48), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 15:27:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2022-11-25 15:27:49,392 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 58 [2022-11-25 15:27:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:27:49,392 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2022-11-25 15:27:49,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-25 15:27:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2022-11-25 15:27:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 15:27:49,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:27:49,395 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:27:49,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:27:49,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:49,601 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:27:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:27:49,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1609951834, now seen corresponding path program 1 times [2022-11-25 15:27:49,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:27:49,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662466457] [2022-11-25 15:27:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:49,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:27:49,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:27:49,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278091248] [2022-11-25 15:27:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:27:49,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:27:49,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:27:49,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:27:49,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:27:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:27:51,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 15:27:51,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:27:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 15:27:52,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:27:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-25 15:27:54,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:27:54,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662466457] [2022-11-25 15:27:54,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:27:54,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278091248] [2022-11-25 15:27:54,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278091248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:27:54,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:27:54,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 18 [2022-11-25 15:27:54,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996094832] [2022-11-25 15:27:54,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:27:54,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 15:27:54,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:27:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 15:27:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:27:54,250 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-25 15:28:01,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:28:06,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:28:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:28:06,226 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2022-11-25 15:28:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:28:06,228 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) Word has length 68 [2022-11-25 15:28:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:28:06,230 INFO L225 Difference]: With dead ends: 111 [2022-11-25 15:28:06,230 INFO L226 Difference]: Without dead ends: 99 [2022-11-25 15:28:06,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:28:06,231 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:28:06,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 183 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 573 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2022-11-25 15:28:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-25 15:28:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-11-25 15:28:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 61 states have internal predecessors, (64), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (32), 27 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-25 15:28:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2022-11-25 15:28:06,308 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 68 [2022-11-25 15:28:06,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:28:06,308 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2022-11-25 15:28:06,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-25 15:28:06,309 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2022-11-25 15:28:06,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 15:28:06,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:28:06,314 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:28:06,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:28:06,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 15:28:06,523 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:28:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:28:06,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2022-11-25 15:28:06,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:28:06,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860672630] [2022-11-25 15:28:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:28:06,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:28:06,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:28:06,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370610917] [2022-11-25 15:28:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:28:06,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:28:06,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:28:06,533 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:28:06,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:28:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:28:06,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 15:28:06,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:28:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 15:28:08,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:28:44,935 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~d~0#1| 4294967296))) (let ((.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296)) (.cse3 (div .cse1 2))) (or (= .cse0 1) (<= .cse1 .cse2) (not (= .cse1 (mod (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) 4294967296))) (not (<= (mod .cse3 4294967296) .cse2)) (= (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~B~0#1| (div .cse0 2)) (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1| (* 4294967295 .cse3)) 4294967296))))) is different from true [2022-11-25 15:30:14,083 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:30:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 35 proven. 17 refuted. 2 times theorem prover too weak. 88 trivial. 5 not checked. [2022-11-25 15:30:25,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:30:25,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860672630] [2022-11-25 15:30:25,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:30:25,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370610917] [2022-11-25 15:30:25,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370610917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:30:25,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:30:25,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2022-11-25 15:30:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528343104] [2022-11-25 15:30:25,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:30:25,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 15:30:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:30:25,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 15:30:25,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=413, Unknown=7, NotChecked=42, Total=552 [2022-11-25 15:30:25,311 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 20 states have internal predecessors, (41), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-25 15:30:27,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:30:38,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:30:41,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:30:44,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:31:13,166 WARN L233 SmtUtils]: Spent 18.02s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:31:15,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:31:20,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:31:22,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:31:40,422 WARN L233 SmtUtils]: Spent 11.28s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:31:42,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:31:53,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:32:02,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:32:04,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:32:06,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:32:07,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:32:09,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:32:11,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:32:13,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:32:30,491 WARN L233 SmtUtils]: Spent 7.62s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:32:32,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:33:05,809 WARN L233 SmtUtils]: Spent 30.46s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:33:07,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:33:10,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:33:13,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:33:14,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:33:47,222 WARN L233 SmtUtils]: Spent 21.59s on a formula simplification. DAG size of input: 40 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:33:49,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:33:52,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:33:55,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:33:57,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:34:16,113 WARN L233 SmtUtils]: Spent 12.87s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:34:18,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:34:20,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:34:23,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:34:25,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:34:27,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:34:29,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:34:31,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:35:07,718 WARN L233 SmtUtils]: Spent 25.67s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:35:09,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:35:11,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:35:13,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:35:15,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:35:17,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:35:19,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:35:26,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:35:29,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:35:32,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:35:34,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:35:43,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:36:04,639 WARN L233 SmtUtils]: Spent 11.86s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:36:06,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:36:08,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:36:10,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:36:13,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:36:15,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:36:17,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:36:33,228 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:36:37,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:36:39,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 15:36:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:40,551 INFO L93 Difference]: Finished difference Result 167 states and 216 transitions. [2022-11-25 15:36:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 15:36:40,552 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 20 states have internal predecessors, (41), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) Word has length 71 [2022-11-25 15:36:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:40,554 INFO L225 Difference]: With dead ends: 167 [2022-11-25 15:36:40,554 INFO L226 Difference]: Without dead ends: 135 [2022-11-25 15:36:40,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 286.5s TimeCoverageRelationStatistics Valid=257, Invalid=1187, Unknown=42, NotChecked=74, Total=1560 [2022-11-25 15:36:40,556 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 56 mSolverCounterUnsat, 41 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 41 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 132.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:40,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 193 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 803 Invalid, 41 Unknown, 157 Unchecked, 132.2s Time] [2022-11-25 15:36:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-25 15:36:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 120. [2022-11-25 15:36:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 78 states have internal predecessors, (84), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (31), 27 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-25 15:36:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 147 transitions. [2022-11-25 15:36:40,623 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 147 transitions. Word has length 71 [2022-11-25 15:36:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:40,624 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 147 transitions. [2022-11-25 15:36:40,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 20 states have internal predecessors, (41), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-25 15:36:40,625 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 147 transitions. [2022-11-25 15:36:40,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 15:36:40,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:40,627 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:40,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:40,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:40,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2022-11-25 15:36:40,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:40,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112108519] [2022-11-25 15:36:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:40,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:40,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:36:40,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703816609] [2022-11-25 15:36:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:40,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:40,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:40,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:40,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20c3ed17-ad9a-4b12-aba6-4416fff33800/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process