./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro --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 a3c408aeb75b378569a9828f29f37caa03495bee0afeec4c4af831c79f34806f --- 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-8393723 [2022-11-18 19:32:28,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:32:28,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:32:28,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:32:28,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:32:28,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:32:28,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:32:28,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:32:28,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:32:28,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:32:28,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:32:28,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:32:28,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:32:28,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:32:28,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:32:28,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:32:28,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:32:28,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:32:28,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:32:28,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:32:28,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:32:28,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:32:28,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:32:28,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:32:28,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:32:28,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:32:28,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:32:28,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:32:28,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:32:28,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:32:28,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:32:28,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:32:28,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:32:28,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:32:28,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:32:28,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:32:28,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:32:28,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:32:28,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:32:28,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:32:28,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:32:28,665 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:32:28,703 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:32:28,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:32:28,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:32:28,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:32:28,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:32:28,705 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:32:28,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:32:28,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:32:28,706 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:32:28,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:32:28,708 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:32:28,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:32:28,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:32:28,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:32:28,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:32:28,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:32:28,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:32:28,709 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:32:28,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:32:28,710 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:32:28,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:32:28,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:32:28,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:32:28,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:32:28,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:32:28,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:32:28,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:32:28,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:32:28,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:32:28,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:32:28,712 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:32:28,712 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:32:28,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:32:28,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3c408aeb75b378569a9828f29f37caa03495bee0afeec4c4af831c79f34806f [2022-11-18 19:32:28,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:32:28,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:32:28,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:32:28,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:32:28,971 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:32:28,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c [2022-11-18 19:32:29,047 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/data/96049a89a/ef13783225a74d53a303a9681e33d715/FLAG001d72def [2022-11-18 19:32:29,622 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:32:29,623 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c [2022-11-18 19:32:29,631 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/data/96049a89a/ef13783225a74d53a303a9681e33d715/FLAG001d72def [2022-11-18 19:32:29,979 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/data/96049a89a/ef13783225a74d53a303a9681e33d715 [2022-11-18 19:32:29,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:32:29,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:32:29,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:32:29,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:32:29,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:32:29,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:32:29" (1/1) ... [2022-11-18 19:32:29,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27e49e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:29, skipping insertion in model container [2022-11-18 19:32:29,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:32:29" (1/1) ... [2022-11-18 19:32:30,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:32:30,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:32:30,193 WARN L234 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_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c[538,551] [2022-11-18 19:32:30,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:32:30,219 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:32:30,231 WARN L234 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_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c[538,551] [2022-11-18 19:32:30,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:32:30,251 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:32:30,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30 WrapperNode [2022-11-18 19:32:30,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:32:30,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:32:30,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:32:30,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:32:30,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (1/1) ... [2022-11-18 19:32:30,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (1/1) ... [2022-11-18 19:32:30,284 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-18 19:32:30,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:32:30,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:32:30,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:32:30,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:32:30,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (1/1) ... [2022-11-18 19:32:30,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (1/1) ... [2022-11-18 19:32:30,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (1/1) ... [2022-11-18 19:32:30,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (1/1) ... [2022-11-18 19:32:30,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (1/1) ... [2022-11-18 19:32:30,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (1/1) ... [2022-11-18 19:32:30,305 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (1/1) ... [2022-11-18 19:32:30,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (1/1) ... [2022-11-18 19:32:30,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:32:30,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:32:30,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:32:30,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:32:30,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (1/1) ... [2022-11-18 19:32:30,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:32:30,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:30,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:32:30,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:32:30,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:32:30,408 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 19:32:30,408 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 19:32:30,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:32:30,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:32:30,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:32:30,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 19:32:30,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 19:32:30,474 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:32:30,476 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:32:30,629 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:32:30,635 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:32:30,635 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 19:32:30,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:32:30 BoogieIcfgContainer [2022-11-18 19:32:30,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:32:30,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:32:30,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:32:30,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:32:30,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:32:29" (1/3) ... [2022-11-18 19:32:30,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5236f031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:32:30, skipping insertion in model container [2022-11-18 19:32:30,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:30" (2/3) ... [2022-11-18 19:32:30,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5236f031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:32:30, skipping insertion in model container [2022-11-18 19:32:30,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:32:30" (3/3) ... [2022-11-18 19:32:30,646 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound50.c [2022-11-18 19:32:30,665 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:32:30,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:32:30,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:32:30,725 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;@bf3c02a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:32:30,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:32:30,730 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) [2022-11-18 19:32:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 19:32:30,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:30,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:32:30,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:30,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:30,746 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2022-11-18 19:32:30,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:30,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808790834] [2022-11-18 19:32:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:30,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:30,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:32:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:30,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 19:32:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:30,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 19:32:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:32:30,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:30,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808790834] [2022-11-18 19:32:30,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808790834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:30,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:30,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:32:30,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829609829] [2022-11-18 19:32:31,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:31,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:32:31,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:31,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:32:31,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:32:31,046 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) [2022-11-18 19:32:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:31,082 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2022-11-18 19:32:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:32:31,085 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 [2022-11-18 19:32:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:31,099 INFO L225 Difference]: With dead ends: 63 [2022-11-18 19:32:31,100 INFO L226 Difference]: Without dead ends: 29 [2022-11-18 19:32:31,105 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 [2022-11-18 19:32:31,111 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 [2022-11-18 19:32:31,112 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] [2022-11-18 19:32:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-18 19:32:31,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-18 19:32:31,163 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) [2022-11-18 19:32:31,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-18 19:32:31,168 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-11-18 19:32:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:31,169 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-18 19:32:31,170 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) [2022-11-18 19:32:31,171 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-18 19:32:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 19:32:31,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:31,173 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:32:31,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:32:31,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2022-11-18 19:32:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:31,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913346995] [2022-11-18 19:32:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:31,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:32:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:31,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 19:32:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:31,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 19:32:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:32:31,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913346995] [2022-11-18 19:32:31,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913346995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:31,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:31,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:32:31,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057410865] [2022-11-18 19:32:31,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:31,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:32:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:31,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:32:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:32:31,465 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) [2022-11-18 19:32:31,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:31,557 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-11-18 19:32:31,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:32:31,558 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 [2022-11-18 19:32:31,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:31,559 INFO L225 Difference]: With dead ends: 42 [2022-11-18 19:32:31,559 INFO L226 Difference]: Without dead ends: 40 [2022-11-18 19:32:31,560 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 [2022-11-18 19:32:31,561 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:31,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:32:31,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-18 19:32:31,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-18 19:32:31,570 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) [2022-11-18 19:32:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-18 19:32:31,571 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2022-11-18 19:32:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:31,572 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-18 19:32:31,572 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) [2022-11-18 19:32:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-18 19:32:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 19:32:31,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:31,573 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] [2022-11-18 19:32:31,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:32:31,574 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:31,574 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2022-11-18 19:32:31,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:31,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209848496] [2022-11-18 19:32:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:31,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:31,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 19:32:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:31,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 19:32:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:31,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 19:32:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:31,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 19:32:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:32:31,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:31,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209848496] [2022-11-18 19:32:31,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209848496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:31,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:31,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:32:31,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956407523] [2022-11-18 19:32:31,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:31,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:32:31,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:32:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:32:31,748 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) [2022-11-18 19:32:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:31,871 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2022-11-18 19:32:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:32:31,872 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 [2022-11-18 19:32:31,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:31,873 INFO L225 Difference]: With dead ends: 46 [2022-11-18 19:32:31,874 INFO L226 Difference]: Without dead ends: 44 [2022-11-18 19:32:31,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:32:31,876 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-18 19:32:31,876 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] [2022-11-18 19:32:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-18 19:32:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-11-18 19:32:31,886 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) [2022-11-18 19:32:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-18 19:32:31,903 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2022-11-18 19:32:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:31,904 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-18 19:32:31,904 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) [2022-11-18 19:32:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-18 19:32:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 19:32:31,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:31,905 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] [2022-11-18 19:32:31,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:32:31,906 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:31,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:31,907 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2022-11-18 19:32:31,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:31,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901552250] [2022-11-18 19:32:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:31,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:31,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:32:31,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847763710] [2022-11-18 19:32:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:31,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:31,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:31,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:31,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:32:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:32,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:32:32,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 19:32:32,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 19:32:32,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:32,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901552250] [2022-11-18 19:32:32,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:32:32,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847763710] [2022-11-18 19:32:32,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847763710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:32,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:32:32,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-18 19:32:32,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137002937] [2022-11-18 19:32:32,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:32,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:32:32,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:32,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:32:32,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:32:32,434 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), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-18 19:32:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:32,731 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-11-18 19:32:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:32:32,732 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), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 34 [2022-11-18 19:32:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:32,735 INFO L225 Difference]: With dead ends: 72 [2022-11-18 19:32:32,735 INFO L226 Difference]: Without dead ends: 57 [2022-11-18 19:32:32,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:32:32,737 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:32,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 137 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:32:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-18 19:32:32,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-11-18 19:32:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 19:32:32,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-11-18 19:32:32,753 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 34 [2022-11-18 19:32:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:32,754 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-11-18 19:32:32,758 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), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-18 19:32:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-11-18 19:32:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 19:32:32,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:32,762 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] [2022-11-18 19:32:32,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 19:32:32,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:32,969 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:32,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2022-11-18 19:32:32,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:32,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420896497] [2022-11-18 19:32:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:32,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:32,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:32:32,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080049736] [2022-11-18 19:32:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:32,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:32,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:32,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:32,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:32:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 19:32:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:32:33,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 19:32:33,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:33,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420896497] [2022-11-18 19:32:33,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:32:33,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080049736] [2022-11-18 19:32:33,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080049736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:33,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:32:33,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-11-18 19:32:33,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936625039] [2022-11-18 19:32:33,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:33,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:32:33,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:33,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:32:33,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:32:33,706 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-18 19:32:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:34,123 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-11-18 19:32:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:32:34,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 41 [2022-11-18 19:32:34,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:34,126 INFO L225 Difference]: With dead ends: 69 [2022-11-18 19:32:34,126 INFO L226 Difference]: Without dead ends: 62 [2022-11-18 19:32:34,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-18 19:32:34,127 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:34,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 100 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 19:32:34,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-18 19:32:34,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-18 19:32:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 19:32:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-11-18 19:32:34,153 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 41 [2022-11-18 19:32:34,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:34,154 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-11-18 19:32:34,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-18 19:32:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-11-18 19:32:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 19:32:34,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:34,161 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1, 1, 1, 1] [2022-11-18 19:32:34,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:32:34,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:34,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:34,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:34,368 INFO L85 PathProgramCache]: Analyzing trace with hash -677073599, now seen corresponding path program 1 times [2022-11-18 19:32:34,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:34,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527081016] [2022-11-18 19:32:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:34,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:34,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:32:34,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137207361] [2022-11-18 19:32:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:34,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:34,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:34,397 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:34,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:32:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:34,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:32:34,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-18 19:32:34,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:34,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:34,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527081016] [2022-11-18 19:32:34,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:32:34,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137207361] [2022-11-18 19:32:34,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137207361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:34,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:34,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:32:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41797664] [2022-11-18 19:32:34,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:34,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:32:34,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:34,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:32:34,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:32:34,556 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-18 19:32:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:34,659 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2022-11-18 19:32:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:32:34,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2022-11-18 19:32:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:34,666 INFO L225 Difference]: With dead ends: 70 [2022-11-18 19:32:34,667 INFO L226 Difference]: Without dead ends: 63 [2022-11-18 19:32:34,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:32:34,670 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:34,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 67 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:32:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-18 19:32:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-18 19:32:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 19:32:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-11-18 19:32:34,708 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 69 [2022-11-18 19:32:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:34,708 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-11-18 19:32:34,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-18 19:32:34,711 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-11-18 19:32:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-18 19:32:34,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:34,718 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] [2022-11-18 19:32:34,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 19:32:34,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 19:32:34,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:34,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:34,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2022-11-18 19:32:34,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:34,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626433769] [2022-11-18 19:32:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:34,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:34,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:32:34,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322201801] [2022-11-18 19:32:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:34,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:32:34,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:34,942 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:32:34,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:32:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:35,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 19:32:35,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 19:32:36,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:52,717 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse11 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (or (let ((.cse7 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse12 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse13 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (let ((.cse2 (+ .cse12 .cse13)) (.cse5 (not .cse7)) (.cse6 (+ .cse12 .cse13 1)) (.cse8 (* .cse11 |c_ULTIMATE.start_main_~q~0#1|)) (.cse9 (* (div |c_ULTIMATE.start_main_~p~0#1| 2) .cse11)) (.cse1 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse0 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (or (and (not .cse0) .cse1) (let ((.cse3 (+ .cse8 |c_ULTIMATE.start_main_~r~0#1| .cse9)) (.cse4 (< |c_ULTIMATE.start_main_~d~0#1| 0))) (and (or (= .cse2 .cse3) (and .cse4 .cse5)) (or (= .cse3 .cse6) .cse7 (not .cse4))))) (or (let ((.cse10 (+ .cse8 .cse11 |c_ULTIMATE.start_main_~r~0#1| .cse9))) (and (or (= .cse2 .cse10) .cse5) (or (= .cse10 .cse6) .cse7))) (not .cse1) .cse0)))) (not (= |c_ULTIMATE.start_main_~d~0#1| (* |c_ULTIMATE.start_main_~p~0#1| .cse11))))) is different from true [2022-11-18 19:33:47,580 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse11 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (or (let ((.cse7 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse12 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse13 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (let ((.cse2 (+ .cse12 .cse13)) (.cse5 (not .cse7)) (.cse6 (+ .cse12 .cse13 1)) (.cse8 (* .cse11 |c_ULTIMATE.start_main_~q~0#1|)) (.cse9 (* (div |c_ULTIMATE.start_main_~p~0#1| 2) .cse11)) (.cse1 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse0 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (or (and (not .cse0) .cse1) (let ((.cse3 (+ .cse8 |c_ULTIMATE.start_main_~r~0#1| .cse9)) (.cse4 (< |c_ULTIMATE.start_main_~d~0#1| 0))) (and (or (= .cse2 .cse3) (and .cse4 .cse5)) (or (= .cse3 .cse6) .cse7 (not .cse4))))) (or (let ((.cse10 (+ .cse8 .cse11 |c_ULTIMATE.start_main_~r~0#1| .cse9))) (and (or (= .cse2 .cse10) .cse5) (or (= .cse10 .cse6) .cse7))) (not .cse1) .cse0)))) (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|) (not (= |c_ULTIMATE.start_main_~d~0#1| (* |c_ULTIMATE.start_main_~p~0#1| .cse11))))) is different from true [2022-11-18 19:35:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 103 trivial. 7 not checked. [2022-11-18 19:35:03,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:03,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626433769] [2022-11-18 19:35:03,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:35:03,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322201801] [2022-11-18 19:35:03,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322201801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:35:03,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:35:03,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2022-11-18 19:35:03,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387603854] [2022-11-18 19:35:03,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:35:03,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 19:35:03,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:03,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 19:35:03,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=351, Unknown=2, NotChecked=78, Total=506 [2022-11-18 19:35:03,517 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-18 19:35:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:35:12,725 INFO L93 Difference]: Finished difference Result 118 states and 145 transitions. [2022-11-18 19:35:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 19:35:12,726 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) Word has length 71 [2022-11-18 19:35:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:35:12,727 INFO L225 Difference]: With dead ends: 118 [2022-11-18 19:35:12,727 INFO L226 Difference]: Without dead ends: 100 [2022-11-18 19:35:12,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=171, Invalid=765, Unknown=2, NotChecked=118, Total=1056 [2022-11-18 19:35:12,729 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:35:12,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 123 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 549 Invalid, 0 Unknown, 144 Unchecked, 3.3s Time] [2022-11-18 19:35:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-18 19:35:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2022-11-18 19:35:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 60 states have internal predecessors, (62), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-18 19:35:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-11-18 19:35:12,760 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 71 [2022-11-18 19:35:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:35:12,761 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-11-18 19:35:12,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-18 19:35:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-11-18 19:35:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-18 19:35:12,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:35:12,762 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] [2022-11-18 19:35:12,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:35:12,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 19:35:12,968 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:35:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:12,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2022-11-18 19:35:12,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:12,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047658842] [2022-11-18 19:35:12,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:12,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:12,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:35:12,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974163209] [2022-11-18 19:35:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:12,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:12,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:12,984 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:35:12,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:35:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:13,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 19:35:13,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:35:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-11-18 19:35:13,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:35:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-18 19:35:15,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:15,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047658842] [2022-11-18 19:35:15,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:35:15,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974163209] [2022-11-18 19:35:15,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974163209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:35:15,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:35:15,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-11-18 19:35:15,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273275144] [2022-11-18 19:35:15,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:35:15,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 19:35:15,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:15,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 19:35:15,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:35:15,372 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-18 19:35:18,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:35:18,101 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2022-11-18 19:35:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:35:18,102 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 82 [2022-11-18 19:35:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:35:18,103 INFO L225 Difference]: With dead ends: 127 [2022-11-18 19:35:18,103 INFO L226 Difference]: Without dead ends: 97 [2022-11-18 19:35:18,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-11-18 19:35:18,104 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:35:18,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 256 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-18 19:35:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-18 19:35:18,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2022-11-18 19:35:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-18 19:35:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2022-11-18 19:35:18,128 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 82 [2022-11-18 19:35:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:35:18,128 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2022-11-18 19:35:18,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-18 19:35:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2022-11-18 19:35:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-18 19:35:18,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:35:18,130 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 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] [2022-11-18 19:35:18,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:35:18,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:18,332 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:35:18,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1888027627, now seen corresponding path program 2 times [2022-11-18 19:35:18,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:18,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934553070] [2022-11-18 19:35:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:18,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:18,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:35:18,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768372379] [2022-11-18 19:35:18,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:35:18,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:18,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:18,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:35:18,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:35:18,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:35:18,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:35:18,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:35:18,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:35:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-18 19:35:18,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:35:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-18 19:35:18,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:18,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934553070] [2022-11-18 19:35:18,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:35:18,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768372379] [2022-11-18 19:35:18,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768372379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:35:18,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:35:18,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-11-18 19:35:18,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625107434] [2022-11-18 19:35:18,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:35:18,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:35:18,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:35:18,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:35:18,608 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-18 19:35:18,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:35:18,716 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-11-18 19:35:18,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:35:18,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 84 [2022-11-18 19:35:18,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:35:18,718 INFO L225 Difference]: With dead ends: 108 [2022-11-18 19:35:18,718 INFO L226 Difference]: Without dead ends: 81 [2022-11-18 19:35:18,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:35:18,719 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:35:18,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:35:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-18 19:35:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-18 19:35:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-18 19:35:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-11-18 19:35:18,743 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 84 [2022-11-18 19:35:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:35:18,744 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-11-18 19:35:18,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-18 19:35:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-11-18 19:35:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 19:35:18,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:35:18,746 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:18,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:35:18,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:18,952 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:35:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 3 times [2022-11-18 19:35:18,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:18,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319124358] [2022-11-18 19:35:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:18,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:18,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:35:18,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417036658] [2022-11-18 19:35:18,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:35:18,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:18,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:18,965 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:35:18,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:35:19,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 19:35:19,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:35:19,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 19:35:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:35:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-18 19:35:19,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:36:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 19 refuted. 5 times theorem prover too weak. 324 trivial. 0 not checked. [2022-11-18 19:36:06,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319124358] [2022-11-18 19:36:06,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:36:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417036658] [2022-11-18 19:36:06,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417036658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:36:06,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:36:06,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2022-11-18 19:36:06,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861089292] [2022-11-18 19:36:06,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:36:06,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 19:36:06,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 19:36:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=381, Unknown=2, NotChecked=0, Total=462 [2022-11-18 19:36:06,137 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2022-11-18 19:38:06,570 WARN L233 SmtUtils]: Spent 1.97m on a formula simplification. DAG size of input: 172 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:38:08,841 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 [] [2022-11-18 19:38:10,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:38:12,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:38:14,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:38:16,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:38:18,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:38:20,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:38:22,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:43:44,310 WARN L233 SmtUtils]: Spent 5.23m on a formula simplification. DAG size of input: 148 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:46:11,155 WARN L233 SmtUtils]: Spent 2.35m on a formula simplification. DAG size of input: 142 DAG size of output: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:46:16,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:17,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:22,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:25,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:28,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:31,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:33,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:35,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:37,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:40,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:42,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:43,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:46:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:46:47,054 INFO L93 Difference]: Finished difference Result 212 states and 274 transitions. [2022-11-18 19:46:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 19:46:47,056 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) Word has length 101 [2022-11-18 19:46:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:46:47,057 INFO L225 Difference]: With dead ends: 212 [2022-11-18 19:46:47,058 INFO L226 Difference]: Without dead ends: 189 [2022-11-18 19:46:47,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 598.9s TimeCoverageRelationStatistics Valid=121, Invalid=631, Unknown=4, NotChecked=0, Total=756 [2022-11-18 19:46:47,059 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 120 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 146 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:46:47,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 467 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 977 Invalid, 15 Unknown, 0 Unchecked, 55.3s Time] [2022-11-18 19:46:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-18 19:46:47,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 150. [2022-11-18 19:46:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 90 states have (on average 1.1) internal successors, (99), 94 states have internal predecessors, (99), 43 states have call successors, (43), 16 states have call predecessors, (43), 16 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-18 19:46:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2022-11-18 19:46:47,131 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 101 [2022-11-18 19:46:47,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:46:47,132 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2022-11-18 19:46:47,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2022-11-18 19:46:47,132 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2022-11-18 19:46:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 19:46:47,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:46:47,134 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:46:47,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:46:47,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:46:47,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:46:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:46:47,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1168936300, now seen corresponding path program 2 times [2022-11-18 19:46:47,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:46:47,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343708392] [2022-11-18 19:46:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:46:47,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:46:47,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:46:47,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112518024] [2022-11-18 19:46:47,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:46:47,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:46:47,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:46:47,347 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:46:47,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:46:47,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:46:47,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:46:47,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 19:46:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:46:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-18 19:46:48,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:47:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-18 19:47:04,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:04,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343708392] [2022-11-18 19:47:04,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 19:47:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112518024] [2022-11-18 19:47:04,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112518024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:47:04,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:47:04,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-11-18 19:47:04,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002308828] [2022-11-18 19:47:04,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:47:04,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 19:47:04,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:04,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 19:47:04,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:47:04,471 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2022-11-18 19:47:22,130 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 [] [2022-11-18 19:47:29,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:47:32,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 19:47:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:33,078 INFO L93 Difference]: Finished difference Result 201 states and 256 transitions. [2022-11-18 19:47:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 19:47:33,079 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) Word has length 112 [2022-11-18 19:47:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:33,082 INFO L225 Difference]: With dead ends: 201 [2022-11-18 19:47:33,082 INFO L226 Difference]: Without dead ends: 155 [2022-11-18 19:47:33,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=346, Invalid=1060, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 19:47:33,083 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 104 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 269 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:33,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 256 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 831 Invalid, 2 Unknown, 0 Unchecked, 18.4s Time] [2022-11-18 19:47:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-18 19:47:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 136. [2022-11-18 19:47:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 85 states have internal predecessors, (90), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-18 19:47:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 169 transitions. [2022-11-18 19:47:33,196 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 169 transitions. Word has length 112 [2022-11-18 19:47:33,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:33,197 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 169 transitions. [2022-11-18 19:47:33,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 16 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2022-11-18 19:47:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 169 transitions. [2022-11-18 19:47:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-18 19:47:33,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:33,199 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:33,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:47:33,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 19:47:33,405 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:33,405 INFO L85 PathProgramCache]: Analyzing trace with hash -929042098, now seen corresponding path program 4 times [2022-11-18 19:47:33,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:33,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176881086] [2022-11-18 19:47:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:33,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:33,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 19:47:33,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113835134] [2022-11-18 19:47:33,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:47:33,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:33,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:33,424 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:47:33,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3038cc6-7d1f-4286-aaaf-a4763ff216f8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:47:33,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:47:33,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:47:33,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 19:47:33,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:47:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 60 proven. 63 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2022-11-18 19:47:34,188 INFO L328 TraceCheckSpWp]: Computing backward predicates...