./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4aef2940f6d326843487f003443fc222e2136d386047f492f8bd5c7e21afc8f5 --- 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-5e519f3 [2022-11-03 01:56:30,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:56:30,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:56:30,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:56:30,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:56:30,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:56:30,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:56:30,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:56:30,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:56:30,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:56:30,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:56:30,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:56:30,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:56:30,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:56:30,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:56:30,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:56:30,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:56:30,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:56:30,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:56:30,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:56:30,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:56:30,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:56:30,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:56:30,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:56:30,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:56:30,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:56:30,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:56:30,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:56:30,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:56:30,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:56:30,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:56:30,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:56:30,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:56:30,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:56:30,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:56:30,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:56:30,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:56:30,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:56:30,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:56:30,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:56:30,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:56:30,652 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:56:30,703 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:56:30,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:56:30,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:56:30,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:56:30,706 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:56:30,706 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:56:30,706 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:56:30,706 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:56:30,707 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:56:30,707 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:56:30,708 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:56:30,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:56:30,708 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:56:30,709 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:56:30,709 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:56:30,709 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:56:30,709 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:56:30,710 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:56:30,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:56:30,711 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:56:30,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:56:30,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:56:30,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:56:30,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:56:30,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:56:30,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:56:30,714 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:56:30,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:56:30,714 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:56:30,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:56:30,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:56:30,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:56:30,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:30,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:56:30,716 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:56:30,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:56:30,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:56:30,717 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:56:30,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:56:30,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:56:30,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:56:30,717 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_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4aef2940f6d326843487f003443fc222e2136d386047f492f8bd5c7e21afc8f5 [2022-11-03 01:56:31,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:56:31,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:56:31,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:56:31,162 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:56:31,164 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:56:31,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c [2022-11-03 01:56:31,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/data/967fc1199/c3764b8d7eb5496494e057131a4e5759/FLAG8e05fe0e1 [2022-11-03 01:56:31,851 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:56:31,852 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c [2022-11-03 01:56:31,861 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/data/967fc1199/c3764b8d7eb5496494e057131a4e5759/FLAG8e05fe0e1 [2022-11-03 01:56:32,170 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/data/967fc1199/c3764b8d7eb5496494e057131a4e5759 [2022-11-03 01:56:32,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:56:32,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:56:32,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:32,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:56:32,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:56:32,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4805df3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32, skipping insertion in model container [2022-11-03 01:56:32,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:56:32,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:56:32,522 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c[489,502] [2022-11-03 01:56:32,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:32,553 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:56:32,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c[489,502] [2022-11-03 01:56:32,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:32,614 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:56:32,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32 WrapperNode [2022-11-03 01:56:32,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:32,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:32,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:56:32,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:56:32,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,669 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2022-11-03 01:56:32,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:32,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:56:32,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:56:32,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:56:32,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,692 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:56:32,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:56:32,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:56:32,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:56:32,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (1/1) ... [2022-11-03 01:56:32,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:32,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:32,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:56:32,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:56:32,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:56:32,797 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:56:32,797 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:56:32,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:56:32,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:56:32,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:56:32,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:56:32,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:56:32,880 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:56:32,883 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:56:33,060 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:56:33,098 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:56:33,099 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:56:33,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:33 BoogieIcfgContainer [2022-11-03 01:56:33,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:56:33,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:56:33,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:56:33,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:56:33,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:56:32" (1/3) ... [2022-11-03 01:56:33,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58638f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:33, skipping insertion in model container [2022-11-03 01:56:33,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:32" (2/3) ... [2022-11-03 01:56:33,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58638f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:33, skipping insertion in model container [2022-11-03 01:56:33,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:33" (3/3) ... [2022-11-03 01:56:33,112 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound20.c [2022-11-03 01:56:33,134 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:56:33,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:56:33,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:56:33,251 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=FINITE_AUTOMATA, 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;@21f5591, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:56:33,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:56:33,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 01:56:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:56:33,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:33,268 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:33,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:33,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2091718616, now seen corresponding path program 1 times [2022-11-03 01:56:33,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:33,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524214307] [2022-11-03 01:56:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:33,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:56:33,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:33,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524214307] [2022-11-03 01:56:33,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524214307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:33,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:33,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:56:33,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252192493] [2022-11-03 01:56:33,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:33,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:56:33,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:56:33,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:56:33,619 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:56:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:33,695 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2022-11-03 01:56:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:56:33,698 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2022-11-03 01:56:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:33,714 INFO L225 Difference]: With dead ends: 42 [2022-11-03 01:56:33,715 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 01:56:33,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:56:33,735 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:33,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 01:56:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-03 01:56:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:56:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-11-03 01:56:33,801 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2022-11-03 01:56:33,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:33,803 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-11-03 01:56:33,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:56:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-11-03 01:56:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:56:33,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:33,807 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:33,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:56:33,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash -234462492, now seen corresponding path program 1 times [2022-11-03 01:56:33,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:33,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380979203] [2022-11-03 01:56:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:33,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:56:34,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:34,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380979203] [2022-11-03 01:56:34,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380979203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:34,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:34,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:56:34,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469728932] [2022-11-03 01:56:34,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:34,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:56:34,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:34,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:56:34,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:56:34,040 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:56:34,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:34,151 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-11-03 01:56:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:56:34,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-03 01:56:34,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:34,153 INFO L225 Difference]: With dead ends: 34 [2022-11-03 01:56:34,153 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 01:56:34,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:56:34,156 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:34,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 01:56:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-03 01:56:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:56:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-03 01:56:34,167 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 14 [2022-11-03 01:56:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:34,167 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-03 01:56:34,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:56:34,168 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-03 01:56:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:56:34,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:34,169 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:34,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:56:34,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:34,171 INFO L85 PathProgramCache]: Analyzing trace with hash -232794196, now seen corresponding path program 1 times [2022-11-03 01:56:34,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:34,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943785667] [2022-11-03 01:56:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:34,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:34,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:56:34,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009038266] [2022-11-03 01:56:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:34,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:34,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:34,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:34,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:56:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:34,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:56:34,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:56:34,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:34,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943785667] [2022-11-03 01:56:34,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:56:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009038266] [2022-11-03 01:56:34,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009038266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:34,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:34,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:56:34,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140447489] [2022-11-03 01:56:34,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:34,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:56:34,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:34,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:56:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:34,400 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:56:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:34,491 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-11-03 01:56:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:56:34,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-03 01:56:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:34,493 INFO L225 Difference]: With dead ends: 38 [2022-11-03 01:56:34,493 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 01:56:34,494 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 [2022-11-03 01:56:34,495 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:34,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 01:56:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-11-03 01:56:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-03 01:56:34,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2022-11-03 01:56:34,517 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 14 [2022-11-03 01:56:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:34,517 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2022-11-03 01:56:34,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:56:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2022-11-03 01:56:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 01:56:34,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:34,526 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:34,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 01:56:34,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-03 01:56:34,741 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:34,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1519768090, now seen corresponding path program 1 times [2022-11-03 01:56:34,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:34,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270686313] [2022-11-03 01:56:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:34,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:34,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:56:34,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998061888] [2022-11-03 01:56:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:34,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:34,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:34,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:34,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:56:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:34,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:56:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:56:35,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:35,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:35,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270686313] [2022-11-03 01:56:35,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:56:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998061888] [2022-11-03 01:56:35,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998061888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:35,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:35,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:56:35,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773161178] [2022-11-03 01:56:35,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:35,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:56:35,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:35,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:56:35,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:56:35,117 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:56:35,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:35,288 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2022-11-03 01:56:35,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:56:35,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2022-11-03 01:56:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:35,290 INFO L225 Difference]: With dead ends: 42 [2022-11-03 01:56:35,291 INFO L226 Difference]: Without dead ends: 40 [2022-11-03 01:56:35,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:56:35,293 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:35,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 103 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:35,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-03 01:56:35,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-03 01:56:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-03 01:56:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-11-03 01:56:35,307 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 19 [2022-11-03 01:56:35,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:35,308 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-11-03 01:56:35,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 01:56:35,309 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-11-03 01:56:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 01:56:35,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:35,310 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:35,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:35,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:35,536 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1808022612, now seen corresponding path program 1 times [2022-11-03 01:56:35,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:35,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408160153] [2022-11-03 01:56:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:35,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:35,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:56:35,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290749040] [2022-11-03 01:56:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:35,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:35,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:35,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:35,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:56:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:35,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 01:56:35,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:56:35,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:35,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:35,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408160153] [2022-11-03 01:56:35,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:56:35,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290749040] [2022-11-03 01:56:35,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290749040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:35,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:35,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 01:56:35,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950458829] [2022-11-03 01:56:35,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:35,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:56:35,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:35,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:56:35,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:56:35,916 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 01:56:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:36,137 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-11-03 01:56:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:56:36,138 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-11-03 01:56:36,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:36,144 INFO L225 Difference]: With dead ends: 46 [2022-11-03 01:56:36,144 INFO L226 Difference]: Without dead ends: 42 [2022-11-03 01:56:36,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:56:36,150 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:36,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 101 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-03 01:56:36,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-03 01:56:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 01:56:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-11-03 01:56:36,171 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 24 [2022-11-03 01:56:36,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:36,171 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-11-03 01:56:36,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 01:56:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-11-03 01:56:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:56:36,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:36,173 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:36,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:36,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:36,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1397146583, now seen corresponding path program 1 times [2022-11-03 01:56:36,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:36,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497307864] [2022-11-03 01:56:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:36,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:36,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:56:36,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069137482] [2022-11-03 01:56:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:36,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:36,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:36,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:36,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:56:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:36,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:56:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:56:36,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:36,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:36,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497307864] [2022-11-03 01:56:36,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:56:36,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069137482] [2022-11-03 01:56:36,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069137482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:36,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:36,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:56:36,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386886272] [2022-11-03 01:56:36,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:36,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:56:36,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:36,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:56:36,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:36,556 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:56:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:36,659 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-11-03 01:56:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:56:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 30 [2022-11-03 01:56:36,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:36,663 INFO L225 Difference]: With dead ends: 52 [2022-11-03 01:56:36,663 INFO L226 Difference]: Without dead ends: 50 [2022-11-03 01:56:36,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:56:36,668 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:36,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 100 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:36,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-03 01:56:36,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-11-03 01:56:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 01:56:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-11-03 01:56:36,702 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 30 [2022-11-03 01:56:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:36,704 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-11-03 01:56:36,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:56:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-11-03 01:56:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 01:56:36,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:36,708 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:36,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:36,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:36,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash 882095404, now seen corresponding path program 1 times [2022-11-03 01:56:36,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:36,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334396702] [2022-11-03 01:56:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:36,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:36,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:56:36,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218581406] [2022-11-03 01:56:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:36,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:36,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:36,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:36,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:56:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:37,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:56:37,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:56:37,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:56:37,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:37,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334396702] [2022-11-03 01:56:37,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:56:37,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218581406] [2022-11-03 01:56:37,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218581406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:37,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560362806] [2022-11-03 01:56:37,279 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 01:56:37,280 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:37,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:37,290 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:37,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:41,399 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-03 01:56:41,407 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-03 01:56:41,445 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:43,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1217#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:56:43,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:56:43,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:56:43,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-03 01:56:43,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903969683] [2022-11-03 01:56:43,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:43,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:56:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:56:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:56:43,251 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 01:56:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:43,464 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2022-11-03 01:56:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:56:43,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 32 [2022-11-03 01:56:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:43,472 INFO L225 Difference]: With dead ends: 109 [2022-11-03 01:56:43,472 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 01:56:43,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-03 01:56:43,478 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 60 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:43,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 165 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 01:56:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2022-11-03 01:56:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.16) internal successors, (58), 54 states have internal predecessors, (58), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-03 01:56:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-11-03 01:56:43,519 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 32 [2022-11-03 01:56:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:43,520 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-11-03 01:56:43,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 01:56:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-11-03 01:56:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 01:56:43,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:43,522 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:43,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:43,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:56:43,731 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash 883763700, now seen corresponding path program 1 times [2022-11-03 01:56:43,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:43,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818390715] [2022-11-03 01:56:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:43,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:43,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:56:43,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057485742] [2022-11-03 01:56:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:43,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:43,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:43,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:43,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:56:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:43,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:56:43,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:56:44,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:56:44,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:44,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818390715] [2022-11-03 01:56:44,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:56:44,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057485742] [2022-11-03 01:56:44,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057485742] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:44,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:56:44,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-03 01:56:44,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387891911] [2022-11-03 01:56:44,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:44,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:56:44,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:44,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:56:44,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:56:44,161 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:56:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:44,249 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2022-11-03 01:56:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:56:44,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-11-03 01:56:44,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:44,252 INFO L225 Difference]: With dead ends: 105 [2022-11-03 01:56:44,252 INFO L226 Difference]: Without dead ends: 103 [2022-11-03 01:56:44,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:56:44,254 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:44,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 64 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-03 01:56:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-03 01:56:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 63 states have internal predecessors, (67), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-03 01:56:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2022-11-03 01:56:44,277 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 32 [2022-11-03 01:56:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:44,278 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2022-11-03 01:56:44,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:56:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2022-11-03 01:56:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 01:56:44,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:44,279 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:44,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:44,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:44,487 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:44,488 INFO L85 PathProgramCache]: Analyzing trace with hash 481580745, now seen corresponding path program 1 times [2022-11-03 01:56:44,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:44,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007566498] [2022-11-03 01:56:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:44,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:44,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:56:44,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925196346] [2022-11-03 01:56:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:44,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:44,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:44,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:44,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:56:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:44,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:56:44,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:56:44,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:56:44,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:44,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007566498] [2022-11-03 01:56:44,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:56:44,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925196346] [2022-11-03 01:56:44,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925196346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:44,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501568828] [2022-11-03 01:56:44,778 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-03 01:56:44,778 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:44,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:44,779 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:44,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:45,379 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-03 01:56:45,391 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-03 01:56:45,424 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:47,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1501568828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:47,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:56:47,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 8] total 20 [2022-11-03 01:56:47,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449771752] [2022-11-03 01:56:47,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:47,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:56:47,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:47,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:56:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:56:47,574 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:56:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:47,798 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2022-11-03 01:56:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:56:47,800 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2022-11-03 01:56:47,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:47,802 INFO L225 Difference]: With dead ends: 105 [2022-11-03 01:56:47,802 INFO L226 Difference]: Without dead ends: 95 [2022-11-03 01:56:47,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 14 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:56:47,804 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:47,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-11-03 01:56:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-03 01:56:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-03 01:56:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-03 01:56:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2022-11-03 01:56:47,828 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 35 [2022-11-03 01:56:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:47,828 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2022-11-03 01:56:47,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:56:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2022-11-03 01:56:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 01:56:47,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:47,830 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:47,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:48,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 01:56:48,048 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:48,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1530726558, now seen corresponding path program 2 times [2022-11-03 01:56:48,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:48,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983024082] [2022-11-03 01:56:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:48,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:48,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:56:48,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133246524] [2022-11-03 01:56:48,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:56:48,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:48,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:48,061 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:48,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:56:48,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:56:48,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:48,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:56:48,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 01:56:48,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:56:49,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:49,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983024082] [2022-11-03 01:56:49,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:56:49,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133246524] [2022-11-03 01:56:49,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133246524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:49,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1817459680] [2022-11-03 01:56:49,046 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 01:56:49,046 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:49,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:49,047 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:49,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:56:51,941 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-03 01:56:51,946 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-03 01:56:51,975 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:56:54,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2782#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:56:54,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:56:54,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:56:54,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-11-03 01:56:54,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628594114] [2022-11-03 01:56:54,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:54,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:56:54,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:54,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:56:54,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:56:54,689 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 01:56:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:57,365 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2022-11-03 01:56:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:56:57,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2022-11-03 01:56:57,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:57,367 INFO L225 Difference]: With dead ends: 105 [2022-11-03 01:56:57,367 INFO L226 Difference]: Without dead ends: 103 [2022-11-03 01:56:57,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:56:57,369 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:57,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 142 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:56:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-03 01:56:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-03 01:56:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 64 states have internal predecessors, (67), 27 states have call successors, (27), 15 states have call predecessors, (27), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-03 01:56:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-11-03 01:56:57,395 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 37 [2022-11-03 01:56:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:57,396 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-11-03 01:56:57,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-03 01:56:57,396 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-11-03 01:56:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 01:56:57,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:57,397 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:57,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:56:57,611 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash -333653004, now seen corresponding path program 3 times [2022-11-03 01:56:57,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:57,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916695534] [2022-11-03 01:56:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:57,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:56:57,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291525343] [2022-11-03 01:56:57,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:56:57,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:57,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:57,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:57,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:56:57,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:56:57,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:57,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:56:57,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:56:58,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:56:58,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:58,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916695534] [2022-11-03 01:56:58,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:56:58,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291525343] [2022-11-03 01:56:58,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291525343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:58,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [773563573] [2022-11-03 01:56:58,755 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 01:56:58,755 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:58,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:56:58,756 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:56:58,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:01,699 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-03 01:57:01,704 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-03 01:57:01,736 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:05,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3367#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:57:05,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:05,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:57:05,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-11-03 01:57:05,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346990101] [2022-11-03 01:57:05,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:05,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:57:05,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:05,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:57:05,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-11-03 01:57:05,366 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 8 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-03 01:57:08,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:57:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:08,637 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2022-11-03 01:57:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:57:08,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 8 states have call predecessors, (12), 4 states have call successors, (12) Word has length 42 [2022-11-03 01:57:08,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:08,639 INFO L225 Difference]: With dead ends: 120 [2022-11-03 01:57:08,639 INFO L226 Difference]: Without dead ends: 108 [2022-11-03 01:57:08,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:57:08,641 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:08,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 90 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 280 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 01:57:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-03 01:57:08,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-11-03 01:57:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 64 states have internal predecessors, (67), 22 states have call successors, (22), 16 states have call predecessors, (22), 15 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-03 01:57:08,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2022-11-03 01:57:08,664 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 42 [2022-11-03 01:57:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:08,665 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2022-11-03 01:57:08,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 8 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-03 01:57:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2022-11-03 01:57:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 01:57:08,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:08,667 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:08,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:08,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:08,871 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:08,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:08,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1884634751, now seen corresponding path program 1 times [2022-11-03 01:57:08,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:08,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813072217] [2022-11-03 01:57:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:08,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:08,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:08,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131081518] [2022-11-03 01:57:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:08,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:08,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:08,884 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:08,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:57:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:08,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:57:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 01:57:09,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 01:57:09,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:09,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813072217] [2022-11-03 01:57:09,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:09,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131081518] [2022-11-03 01:57:09,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131081518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:09,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [975770352] [2022-11-03 01:57:09,193 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-03 01:57:09,194 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:09,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:09,194 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:09,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:12,370 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-03 01:57:12,375 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-03 01:57:12,399 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:23,190 WARN L234 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 61 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:57:24,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4025#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:57:24,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:24,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:57:24,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-03 01:57:24,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478347961] [2022-11-03 01:57:24,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:24,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:57:24,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:24,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:57:24,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:57:24,044 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 01:57:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:24,325 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-11-03 01:57:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:57:24,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 53 [2022-11-03 01:57:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:24,327 INFO L225 Difference]: With dead ends: 106 [2022-11-03 01:57:24,327 INFO L226 Difference]: Without dead ends: 86 [2022-11-03 01:57:24,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:57:24,329 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:24,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:57:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-03 01:57:24,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-03 01:57:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 01:57:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2022-11-03 01:57:24,350 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 53 [2022-11-03 01:57:24,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:24,350 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2022-11-03 01:57:24,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 01:57:24,351 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2022-11-03 01:57:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 01:57:24,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:24,352 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:24,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:24,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:24,553 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:24,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1445886962, now seen corresponding path program 4 times [2022-11-03 01:57:24,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:24,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612469683] [2022-11-03 01:57:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:24,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:24,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:24,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694832271] [2022-11-03 01:57:24,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:57:24,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:24,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:24,567 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:24,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:57:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:24,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 01:57:24,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 41 proven. 73 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 01:57:28,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 76 proven. 8 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-03 01:57:29,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:29,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612469683] [2022-11-03 01:57:29,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:29,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694832271] [2022-11-03 01:57:29,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694832271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:29,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1988579006] [2022-11-03 01:57:29,073 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 01:57:29,073 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:29,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:29,073 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:29,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:31,893 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-03 01:57:31,898 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-03 01:57:31,936 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:36,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4767#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:57:36,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:36,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:57:36,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-11-03 01:57:36,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635861774] [2022-11-03 01:57:36,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:36,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:57:36,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:36,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:57:36,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-11-03 01:57:36,141 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-03 01:57:41,232 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 [] [2022-11-03 01:57:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:41,233 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2022-11-03 01:57:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:57:41,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) Word has length 73 [2022-11-03 01:57:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:41,240 INFO L225 Difference]: With dead ends: 96 [2022-11-03 01:57:41,240 INFO L226 Difference]: Without dead ends: 94 [2022-11-03 01:57:41,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 182 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:57:41,242 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:41,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 128 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 412 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 01:57:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-03 01:57:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-11-03 01:57:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 18 states have call successors, (18), 14 states have call predecessors, (18), 14 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 01:57:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-11-03 01:57:41,263 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 73 [2022-11-03 01:57:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:41,264 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-11-03 01:57:41,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-03 01:57:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-11-03 01:57:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 01:57:41,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:41,266 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:41,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:41,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:57:41,471 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:41,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1678794748, now seen corresponding path program 2 times [2022-11-03 01:57:41,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:41,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211839188] [2022-11-03 01:57:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:41,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:41,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:41,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620413905] [2022-11-03 01:57:41,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:57:41,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:41,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:41,494 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:41,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:57:41,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-03 01:57:41,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:57:41,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:41,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-03 01:57:41,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-03 01:57:41,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:41,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211839188] [2022-11-03 01:57:41,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:41,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620413905] [2022-11-03 01:57:41,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620413905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:41,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266674410] [2022-11-03 01:57:41,946 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 01:57:41,947 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:41,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:41,948 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:41,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:44,430 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-03 01:57:44,437 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-03 01:57:44,475 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:47,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5582#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:57:47,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:47,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:57:47,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-03 01:57:47,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173149890] [2022-11-03 01:57:47,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:47,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:57:47,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:47,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:57:47,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:57:47,709 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2022-11-03 01:57:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:48,168 INFO L93 Difference]: Finished difference Result 212 states and 223 transitions. [2022-11-03 01:57:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:57:48,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 86 [2022-11-03 01:57:48,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:48,171 INFO L225 Difference]: With dead ends: 212 [2022-11-03 01:57:48,171 INFO L226 Difference]: Without dead ends: 198 [2022-11-03 01:57:48,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=295, Invalid=1187, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 01:57:48,174 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 110 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:48,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 173 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:57:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-03 01:57:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-03 01:57:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 130 states have internal predecessors, (131), 36 states have call successors, (36), 32 states have call predecessors, (36), 32 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-03 01:57:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2022-11-03 01:57:48,221 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 86 [2022-11-03 01:57:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:48,222 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2022-11-03 01:57:48,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2022-11-03 01:57:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2022-11-03 01:57:48,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 01:57:48,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:48,226 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:48,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:48,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 01:57:48,432 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:48,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:48,432 INFO L85 PathProgramCache]: Analyzing trace with hash -926531660, now seen corresponding path program 3 times [2022-11-03 01:57:48,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:48,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897182523] [2022-11-03 01:57:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:48,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:48,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:48,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803282334] [2022-11-03 01:57:48,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:57:48,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:48,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:48,454 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:48,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:57:48,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:57:48,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:57:48,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:57:48,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2092 backedges. 60 proven. 1910 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-03 01:57:48,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2092 backedges. 60 proven. 290 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2022-11-03 01:57:49,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:49,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897182523] [2022-11-03 01:57:49,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:49,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803282334] [2022-11-03 01:57:49,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803282334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:49,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668411178] [2022-11-03 01:57:49,408 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 01:57:49,408 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:49,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:49,409 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:49,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:51,790 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-03 01:57:51,795 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 69 for LOIs [2022-11-03 01:57:51,828 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:54,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7372#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:57:54,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:57:54,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:57:54,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-11-03 01:57:54,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095484713] [2022-11-03 01:57:54,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:54,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:57:54,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:54,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:57:54,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 01:57:54,255 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) [2022-11-03 01:57:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:55,320 INFO L93 Difference]: Finished difference Result 392 states and 407 transitions. [2022-11-03 01:57:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 01:57:55,321 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) Word has length 194 [2022-11-03 01:57:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:55,323 INFO L225 Difference]: With dead ends: 392 [2022-11-03 01:57:55,323 INFO L226 Difference]: Without dead ends: 378 [2022-11-03 01:57:55,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 540 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=826, Invalid=2596, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 01:57:55,326 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 225 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:55,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 276 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:57:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-03 01:57:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-03 01:57:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 249 states have (on average 1.0080321285140563) internal successors, (251), 250 states have internal predecessors, (251), 66 states have call successors, (66), 62 states have call predecessors, (66), 62 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-11-03 01:57:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 382 transitions. [2022-11-03 01:57:55,412 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 382 transitions. Word has length 194 [2022-11-03 01:57:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:55,413 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 382 transitions. [2022-11-03 01:57:55,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) [2022-11-03 01:57:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 382 transitions. [2022-11-03 01:57:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-03 01:57:55,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:55,422 INFO L195 NwaCegarLoop]: trace histogram [61, 60, 60, 21, 20, 20, 20, 20, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:55,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:55,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:55,635 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1809623932, now seen corresponding path program 4 times [2022-11-03 01:57:55,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:55,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248784599] [2022-11-03 01:57:55,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:55,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:55,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30656689] [2022-11-03 01:57:55,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:57:55,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:55,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:55,668 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:55,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:57:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:57:56,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:57:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:57:56,689 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:57:56,689 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:57:56,691 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:57:56,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:56,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:57:56,932 INFO L444 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:56,940 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:57:57,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:57:57 BoogieIcfgContainer [2022-11-03 01:57:57,155 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:57:57,156 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:57:57,156 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:57:57,156 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:57:57,157 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:33" (3/4) ... [2022-11-03 01:57:57,159 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-03 01:57:57,329 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 01:57:57,329 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:57:57,330 INFO L158 Benchmark]: Toolchain (without parser) took 85151.73ms. Allocated memory was 109.1MB in the beginning and 325.1MB in the end (delta: 216.0MB). Free memory was 75.9MB in the beginning and 139.8MB in the end (delta: -63.9MB). Peak memory consumption was 152.0MB. Max. memory is 16.1GB. [2022-11-03 01:57:57,330 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 81.8MB. Free memory is still 37.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:57:57,330 INFO L158 Benchmark]: CACSL2BoogieTranslator took 431.99ms. Allocated memory is still 109.1MB. Free memory was 75.6MB in the beginning and 84.2MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 01:57:57,331 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.94ms. Allocated memory is still 109.1MB. Free memory was 83.9MB in the beginning and 82.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:57:57,331 INFO L158 Benchmark]: Boogie Preprocessor took 24.62ms. Allocated memory is still 109.1MB. Free memory was 82.4MB in the beginning and 81.5MB in the end (delta: 986.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:57:57,331 INFO L158 Benchmark]: RCFGBuilder took 406.07ms. Allocated memory is still 109.1MB. Free memory was 81.5MB in the beginning and 68.2MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 01:57:57,332 INFO L158 Benchmark]: TraceAbstraction took 84051.23ms. Allocated memory was 109.1MB in the beginning and 325.1MB in the end (delta: 216.0MB). Free memory was 67.5MB in the beginning and 152.4MB in the end (delta: -84.9MB). Peak memory consumption was 134.2MB. Max. memory is 16.1GB. [2022-11-03 01:57:57,332 INFO L158 Benchmark]: Witness Printer took 173.10ms. Allocated memory is still 325.1MB. Free memory was 152.4MB in the beginning and 139.8MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 01:57:57,343 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 81.8MB. Free memory is still 37.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 431.99ms. Allocated memory is still 109.1MB. Free memory was 75.6MB in the beginning and 84.2MB in the end (delta: -8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.94ms. Allocated memory is still 109.1MB. Free memory was 83.9MB in the beginning and 82.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 24.62ms. Allocated memory is still 109.1MB. Free memory was 82.4MB in the beginning and 81.5MB in the end (delta: 986.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 406.07ms. Allocated memory is still 109.1MB. Free memory was 81.5MB in the beginning and 68.2MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 84051.23ms. Allocated memory was 109.1MB in the beginning and 325.1MB in the end (delta: 216.0MB). Free memory was 67.5MB in the beginning and 152.4MB in the end (delta: -84.9MB). Peak memory consumption was 134.2MB. Max. memory is 16.1GB. * Witness Printer took 173.10ms. Allocated memory is still 325.1MB. Free memory was 152.4MB in the beginning and 139.8MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=2017, y=1175] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=2017, y=1175] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=2017, b=1175, counter=0, p=1, q=0, r=0, s=1, x=2017, y=1175] [L34] EXPR counter++ VAL [a=2017, b=1175, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=2017, b=1175, counter=1, p=1, q=0, r=0, s=1, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=2017, b=1175, counter=1, p=1, q=0, r=0, s=1, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=2017, b=1175, counter=1, p=1, q=0, r=0, s=1, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=842, b=1175, counter=1, p=1, q=0, r=-1, s=1, x=2017, y=1175] [L34] EXPR counter++ VAL [a=842, b=1175, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=842, b=1175, counter=2, p=1, q=0, r=-1, s=1, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=842, b=1175, counter=2, p=1, q=0, r=-1, s=1, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=842, b=1175, counter=2, p=1, q=0, r=-1, s=1, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=842, b=333, counter=2, p=1, q=-1, r=-1, s=2, x=2017, y=1175] [L34] EXPR counter++ VAL [a=842, b=333, counter=3, counter++=2, p=1, q=-1, r=-1, s=2, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=842, b=333, counter=3, p=1, q=-1, r=-1, s=2, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=842, b=333, counter=3, p=1, q=-1, r=-1, s=2, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=842, b=333, counter=3, p=1, q=-1, r=-1, s=2, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=509, b=333, counter=3, p=2, q=-1, r=-3, s=2, x=2017, y=1175] [L34] EXPR counter++ VAL [a=509, b=333, counter=4, counter++=3, p=2, q=-1, r=-3, s=2, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=509, b=333, counter=4, p=2, q=-1, r=-3, s=2, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=509, b=333, counter=4, p=2, q=-1, r=-3, s=2, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=509, b=333, counter=4, p=2, q=-1, r=-3, s=2, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=176, b=333, counter=4, p=3, q=-1, r=-5, s=2, x=2017, y=1175] [L34] EXPR counter++ VAL [a=176, b=333, counter=5, counter++=4, p=3, q=-1, r=-5, s=2, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=176, b=333, counter=5, p=3, q=-1, r=-5, s=2, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=176, b=333, counter=5, p=3, q=-1, r=-5, s=2, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=176, b=333, counter=5, p=3, q=-1, r=-5, s=2, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=176, b=157, counter=5, p=3, q=-4, r=-5, s=7, x=2017, y=1175] [L34] EXPR counter++ VAL [a=176, b=157, counter=6, counter++=5, p=3, q=-4, r=-5, s=7, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=176, b=157, counter=6, p=3, q=-4, r=-5, s=7, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=176, b=157, counter=6, p=3, q=-4, r=-5, s=7, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=176, b=157, counter=6, p=3, q=-4, r=-5, s=7, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=19, b=157, counter=6, p=7, q=-4, r=-12, s=7, x=2017, y=1175] [L34] EXPR counter++ VAL [a=19, b=157, counter=7, counter++=6, p=7, q=-4, r=-12, s=7, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=19, b=157, counter=7, p=7, q=-4, r=-12, s=7, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=19, b=157, counter=7, p=7, q=-4, r=-12, s=7, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=19, b=157, counter=7, p=7, q=-4, r=-12, s=7, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=19, b=138, counter=7, p=7, q=-11, r=-12, s=19, x=2017, y=1175] [L34] EXPR counter++ VAL [a=19, b=138, counter=8, counter++=7, p=7, q=-11, r=-12, s=19, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=19, b=138, counter=8, p=7, q=-11, r=-12, s=19, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=19, b=138, counter=8, p=7, q=-11, r=-12, s=19, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=19, b=138, counter=8, p=7, q=-11, r=-12, s=19, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=19, b=119, counter=8, p=7, q=-18, r=-12, s=31, x=2017, y=1175] [L34] EXPR counter++ VAL [a=19, b=119, counter=9, counter++=8, p=7, q=-18, r=-12, s=31, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=19, b=119, counter=9, p=7, q=-18, r=-12, s=31, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=19, b=119, counter=9, p=7, q=-18, r=-12, s=31, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=19, b=119, counter=9, p=7, q=-18, r=-12, s=31, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=19, b=100, counter=9, p=7, q=-25, r=-12, s=43, x=2017, y=1175] [L34] EXPR counter++ VAL [a=19, b=100, counter=10, counter++=9, p=7, q=-25, r=-12, s=43, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=19, b=100, counter=10, p=7, q=-25, r=-12, s=43, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=19, b=100, counter=10, p=7, q=-25, r=-12, s=43, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=19, b=100, counter=10, p=7, q=-25, r=-12, s=43, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=19, b=81, counter=10, p=7, q=-32, r=-12, s=55, x=2017, y=1175] [L34] EXPR counter++ VAL [a=19, b=81, counter=11, counter++=10, p=7, q=-32, r=-12, s=55, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=19, b=81, counter=11, p=7, q=-32, r=-12, s=55, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=19, b=81, counter=11, p=7, q=-32, r=-12, s=55, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=19, b=81, counter=11, p=7, q=-32, r=-12, s=55, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=19, b=62, counter=11, p=7, q=-39, r=-12, s=67, x=2017, y=1175] [L34] EXPR counter++ VAL [a=19, b=62, counter=12, counter++=11, p=7, q=-39, r=-12, s=67, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=19, b=62, counter=12, p=7, q=-39, r=-12, s=67, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=19, b=62, counter=12, p=7, q=-39, r=-12, s=67, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=19, b=62, counter=12, p=7, q=-39, r=-12, s=67, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=19, b=43, counter=12, p=7, q=-46, r=-12, s=79, x=2017, y=1175] [L34] EXPR counter++ VAL [a=19, b=43, counter=13, counter++=12, p=7, q=-46, r=-12, s=79, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=19, b=43, counter=13, p=7, q=-46, r=-12, s=79, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=19, b=43, counter=13, p=7, q=-46, r=-12, s=79, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=19, b=43, counter=13, p=7, q=-46, r=-12, s=79, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=19, b=24, counter=13, p=7, q=-53, r=-12, s=91, x=2017, y=1175] [L34] EXPR counter++ VAL [a=19, b=24, counter=14, counter++=13, p=7, q=-53, r=-12, s=91, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=19, b=24, counter=14, p=7, q=-53, r=-12, s=91, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=19, b=24, counter=14, p=7, q=-53, r=-12, s=91, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=19, b=24, counter=14, p=7, q=-53, r=-12, s=91, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=19, b=5, counter=14, p=7, q=-60, r=-12, s=103, x=2017, y=1175] [L34] EXPR counter++ VAL [a=19, b=5, counter=15, counter++=14, p=7, q=-60, r=-12, s=103, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=19, b=5, counter=15, p=7, q=-60, r=-12, s=103, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=19, b=5, counter=15, p=7, q=-60, r=-12, s=103, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=19, b=5, counter=15, p=7, q=-60, r=-12, s=103, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=14, b=5, counter=15, p=67, q=-60, r=-115, s=103, x=2017, y=1175] [L34] EXPR counter++ VAL [a=14, b=5, counter=16, counter++=15, p=67, q=-60, r=-115, s=103, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=14, b=5, counter=16, p=67, q=-60, r=-115, s=103, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=14, b=5, counter=16, p=67, q=-60, r=-115, s=103, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=14, b=5, counter=16, p=67, q=-60, r=-115, s=103, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=9, b=5, counter=16, p=127, q=-60, r=-218, s=103, x=2017, y=1175] [L34] EXPR counter++ VAL [a=9, b=5, counter=17, counter++=16, p=127, q=-60, r=-218, s=103, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=9, b=5, counter=17, p=127, q=-60, r=-218, s=103, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=9, b=5, counter=17, p=127, q=-60, r=-218, s=103, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=9, b=5, counter=17, p=127, q=-60, r=-218, s=103, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=4, b=5, counter=17, p=187, q=-60, r=-321, s=103, x=2017, y=1175] [L34] EXPR counter++ VAL [a=4, b=5, counter=18, counter++=17, p=187, q=-60, r=-321, s=103, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=5, counter=18, p=187, q=-60, r=-321, s=103, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=5, counter=18, p=187, q=-60, r=-321, s=103, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=5, counter=18, p=187, q=-60, r=-321, s=103, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=4, b=1, counter=18, p=187, q=-247, r=-321, s=424, x=2017, y=1175] [L34] EXPR counter++ VAL [a=4, b=1, counter=19, counter++=18, p=187, q=-247, r=-321, s=424, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=1, counter=19, p=187, q=-247, r=-321, s=424, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=1, counter=19, p=187, q=-247, r=-321, s=424, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=1, counter=19, p=187, q=-247, r=-321, s=424, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=3, b=1, counter=19, p=434, q=-247, r=-745, s=424, x=2017, y=1175] [L34] EXPR counter++ VAL [a=3, b=1, counter=20, counter++=19, p=434, q=-247, r=-745, s=424, x=2017, y=1175] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=3, b=1, counter=20, p=434, q=-247, r=-745, s=424, x=2017, y=1175] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=1, counter=20, p=434, q=-247, r=-745, s=424, x=2017, y=1175] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=1, counter=20, p=434, q=-247, r=-745, s=424, x=2017, y=1175] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=2, b=1, counter=20, p=681, q=-247, r=-1169, s=424, x=2017, y=1175] [L34] EXPR counter++ VAL [a=2, b=1, counter=21, counter++=20, p=681, q=-247, r=-1169, s=424, x=2017, y=1175] [L34] COND FALSE !(counter++<20) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, counter=21] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 83.7s, OverallIterations: 16, TraceHistogramMax: 61, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 14.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 633 SdHoareTripleChecker+Valid, 10.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 574 mSDsluCounter, 1690 SdHoareTripleChecker+Invalid, 9.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 24 IncrementalHoareTripleChecker+Unchecked, 1314 mSDsCounter, 511 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2052 IncrementalHoareTripleChecker+Invalid, 2589 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 511 mSolverCounterUnsat, 498 mSDtfsCounter, 2052 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1845 GetRequests, 1525 SyntacticMatches, 34 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 37.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=378occurred in iteration=15, InterpolantAutomatonStates: 170, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 23 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 9.3s InterpolantComputationTime, 1072 NumberOfCodeBlocks, 1049 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1258 ConstructedInterpolants, 0 QuantifiedInterpolants, 6165 SizeOfPredicates, 58 NumberOfNonLiveVariables, 1798 ConjunctsInSsa, 225 ConjunctsInUnsatCore, 24 InterpolantComputations, 7 PerfectInterpolantSequences, 3273/5916 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.6s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 23, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 19, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 12, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 45, TOOLS_QUANTIFIERELIM_TIME: 0.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 58, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 23, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 23, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 12, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 263, DAG_COMPRESSION_RETAINED_NODES: 62, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-03 01:57:57,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8b2bea-f954-44a9-a014-f90bbd5da8a4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE