./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5237d83 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_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 637058e9c434875c2a607ff053c6fcb810c5a78083685ed0943116abd98a4161 --- 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-b5237d8 [2022-11-22 01:52:32,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:52:32,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:52:32,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:52:32,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:52:32,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:52:32,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:52:32,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:52:32,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:52:32,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:52:32,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:52:32,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:52:32,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:52:32,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:52:32,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:52:32,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:52:32,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:52:32,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:52:32,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:52:32,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:52:32,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:52:32,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:52:32,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:52:32,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:52:32,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:52:32,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:52:32,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:52:32,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:52:32,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:52:32,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:52:32,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:52:32,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:52:32,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:52:32,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:52:32,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:52:32,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:52:32,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:52:32,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:52:32,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:52:32,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:52:32,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:52:32,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-22 01:52:32,674 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:52:32,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:52:32,675 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:52:32,675 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:52:32,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:52:32,676 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:52:32,677 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:52:32,677 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:52:32,677 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:52:32,677 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:52:32,678 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:52:32,679 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:52:32,679 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:52:32,679 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:52:32,680 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:52:32,680 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:52:32,680 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:52:32,680 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:52:32,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:52:32,682 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:52:32,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:52:32,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:52:32,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:52:32,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:52:32,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:52:32,683 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-22 01:52:32,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:52:32,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:52:32,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:52:32,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:52:32,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:52:32,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:52:32,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:52:32,686 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:52:32,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:52:32,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:52:32,687 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:52:32,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:52:32,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:52:32,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:52:32,688 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_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 637058e9c434875c2a607ff053c6fcb810c5a78083685ed0943116abd98a4161 [2022-11-22 01:52:32,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:52:33,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:52:33,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:52:33,031 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:52:33,031 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:52:33,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i [2022-11-22 01:52:36,006 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:52:36,554 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:52:36,559 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i [2022-11-22 01:52:36,598 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/data/edc40332c/a4f05bc23fdb44638c66cb1c80b01beb/FLAGb73668dff [2022-11-22 01:52:36,612 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/data/edc40332c/a4f05bc23fdb44638c66cb1c80b01beb [2022-11-22 01:52:36,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:52:36,616 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:52:36,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:52:36,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:52:36,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:52:36,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:52:36" (1/1) ... [2022-11-22 01:52:36,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd479ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:36, skipping insertion in model container [2022-11-22 01:52:36,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:52:36" (1/1) ... [2022-11-22 01:52:36,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:52:36,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:52:37,931 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i[222523,222536] [2022-11-22 01:52:38,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:52:38,057 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:52:38,593 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i[222523,222536] [2022-11-22 01:52:38,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:52:38,650 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:52:38,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38 WrapperNode [2022-11-22 01:52:38,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:52:38,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:52:38,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:52:38,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:52:38,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2022-11-22 01:52:38,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2022-11-22 01:52:38,824 INFO L138 Inliner]: procedures = 127, calls = 982, calls flagged for inlining = 54, calls inlined = 42, statements flattened = 886 [2022-11-22 01:52:38,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:52:38,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:52:38,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:52:38,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:52:38,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2022-11-22 01:52:38,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2022-11-22 01:52:38,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2022-11-22 01:52:38,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2022-11-22 01:52:38,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2022-11-22 01:52:38,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2022-11-22 01:52:38,913 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2022-11-22 01:52:38,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2022-11-22 01:52:38,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:52:38,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:52:38,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:52:38,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:52:38,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (1/1) ... [2022-11-22 01:52:38,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:52:38,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:38,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:52:38,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:52:39,034 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-22 01:52:39,034 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-22 01:52:39,034 INFO L130 BoogieDeclarations]: Found specification of procedure flexcop_device_exit [2022-11-22 01:52:39,035 INFO L138 BoogieDeclarations]: Found implementation of procedure flexcop_device_exit [2022-11-22 01:52:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-22 01:52:39,035 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-22 01:52:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:52:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-22 01:52:39,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-22 01:52:39,036 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-22 01:52:39,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-22 01:52:39,036 INFO L130 BoogieDeclarations]: Found specification of procedure flexcop_usb_exit [2022-11-22 01:52:39,036 INFO L138 BoogieDeclarations]: Found implementation of procedure flexcop_usb_exit [2022-11-22 01:52:39,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:52:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-22 01:52:39,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-22 01:52:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-22 01:52:39,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-22 01:52:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure flexcop_device_kfree [2022-11-22 01:52:39,038 INFO L138 BoogieDeclarations]: Found implementation of procedure flexcop_device_kfree [2022-11-22 01:52:39,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:52:39,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:52:39,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:52:39,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:52:39,039 INFO L130 BoogieDeclarations]: Found specification of procedure flexcop_usb_transfer_exit [2022-11-22 01:52:39,040 INFO L138 BoogieDeclarations]: Found implementation of procedure flexcop_usb_transfer_exit [2022-11-22 01:52:39,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 01:52:39,041 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-22 01:52:39,041 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-22 01:52:39,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:52:39,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:52:39,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:52:39,634 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:52:39,636 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:52:41,094 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:52:41,502 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:52:41,502 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 01:52:41,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:52:41 BoogieIcfgContainer [2022-11-22 01:52:41,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:52:41,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:52:41,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:52:41,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:52:41,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:52:36" (1/3) ... [2022-11-22 01:52:41,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6abcd448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:52:41, skipping insertion in model container [2022-11-22 01:52:41,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:52:38" (2/3) ... [2022-11-22 01:52:41,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6abcd448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:52:41, skipping insertion in model container [2022-11-22 01:52:41,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:52:41" (3/3) ... [2022-11-22 01:52:41,517 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--media--usb--b2c2--b2c2-flexcop-usb.ko-main.cil.out.i [2022-11-22 01:52:41,535 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:52:41,535 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-11-22 01:52:41,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:52:41,604 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;@59c9ee68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:52:41,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-11-22 01:52:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 99 states have (on average 1.595959595959596) internal successors, (158), 128 states have internal predecessors, (158), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-22 01:52:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:52:41,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:41,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:41,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-22 01:52:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:41,630 INFO L85 PathProgramCache]: Analyzing trace with hash -270208367, now seen corresponding path program 1 times [2022-11-22 01:52:41,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:41,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565542706] [2022-11-22 01:52:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:41,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:42,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:42,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565542706] [2022-11-22 01:52:42,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565542706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:42,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:42,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:52:42,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674929143] [2022-11-22 01:52:42,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:42,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:52:42,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:42,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:52:42,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:42,237 INFO L87 Difference]: Start difference. First operand has 159 states, 99 states have (on average 1.595959595959596) internal successors, (158), 128 states have internal predecessors, (158), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:52:44,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:44,520 INFO L93 Difference]: Finished difference Result 329 states and 443 transitions. [2022-11-22 01:52:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:44,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-22 01:52:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:44,538 INFO L225 Difference]: With dead ends: 329 [2022-11-22 01:52:44,538 INFO L226 Difference]: Without dead ends: 150 [2022-11-22 01:52:44,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:44,545 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 23 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:44,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 303 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-22 01:52:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-22 01:52:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-11-22 01:52:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 101 states have (on average 1.5247524752475248) internal successors, (154), 120 states have internal predecessors, (154), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 01:52:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 196 transitions. [2022-11-22 01:52:44,597 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 196 transitions. Word has length 14 [2022-11-22 01:52:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:44,598 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 196 transitions. [2022-11-22 01:52:44,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:52:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 196 transitions. [2022-11-22 01:52:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:52:44,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:44,600 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:44,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:52:44,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-22 01:52:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash -900969898, now seen corresponding path program 1 times [2022-11-22 01:52:44,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:44,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525543061] [2022-11-22 01:52:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:44,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:44,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:44,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525543061] [2022-11-22 01:52:44,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525543061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:44,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:44,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:52:44,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318459984] [2022-11-22 01:52:44,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:44,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:52:44,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:44,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:52:44,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:52:44,838 INFO L87 Difference]: Start difference. First operand 150 states and 196 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:52:46,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:49,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:51,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:51,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:51,590 INFO L93 Difference]: Finished difference Result 446 states and 584 transitions. [2022-11-22 01:52:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:52:51,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-22 01:52:51,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:51,593 INFO L225 Difference]: With dead ends: 446 [2022-11-22 01:52:51,593 INFO L226 Difference]: Without dead ends: 297 [2022-11-22 01:52:51,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:51,595 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 204 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:51,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 647 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 202 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-22 01:52:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-22 01:52:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 152. [2022-11-22 01:52:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 103 states have (on average 1.5145631067961165) internal successors, (156), 122 states have internal predecessors, (156), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 01:52:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 198 transitions. [2022-11-22 01:52:51,615 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 198 transitions. Word has length 22 [2022-11-22 01:52:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:51,617 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 198 transitions. [2022-11-22 01:52:51,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:52:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 198 transitions. [2022-11-22 01:52:51,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:52:51,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:51,618 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:51,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:52:51,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-22 01:52:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:51,626 INFO L85 PathProgramCache]: Analyzing trace with hash 450695942, now seen corresponding path program 1 times [2022-11-22 01:52:51,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:51,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099212076] [2022-11-22 01:52:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:51,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:51,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:51,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099212076] [2022-11-22 01:52:51,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099212076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:51,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:51,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:52:51,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904237109] [2022-11-22 01:52:51,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:51,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:52:51,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:51,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:52:51,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:51,877 INFO L87 Difference]: Start difference. First operand 152 states and 198 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:52:53,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:54,080 INFO L93 Difference]: Finished difference Result 318 states and 420 transitions. [2022-11-22 01:52:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:54,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-22 01:52:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:54,082 INFO L225 Difference]: With dead ends: 318 [2022-11-22 01:52:54,083 INFO L226 Difference]: Without dead ends: 167 [2022-11-22 01:52:54,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:54,084 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 26 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:54,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 279 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-22 01:52:54,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-22 01:52:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-11-22 01:52:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 117 states have (on average 1.5213675213675213) internal successors, (178), 136 states have internal predecessors, (178), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 01:52:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2022-11-22 01:52:54,100 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 23 [2022-11-22 01:52:54,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:54,100 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2022-11-22 01:52:54,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:52:54,101 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2022-11-22 01:52:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 01:52:54,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:54,102 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:54,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:52:54,102 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-22 01:52:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:54,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1745602908, now seen corresponding path program 1 times [2022-11-22 01:52:54,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:54,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577835967] [2022-11-22 01:52:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:54,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:54,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:54,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577835967] [2022-11-22 01:52:54,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577835967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:54,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:54,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:52:54,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451612878] [2022-11-22 01:52:54,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:54,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:52:54,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:52:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:54,378 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:52:57,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:57,353 INFO L93 Difference]: Finished difference Result 333 states and 439 transitions. [2022-11-22 01:52:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:57,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-11-22 01:52:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:57,357 INFO L225 Difference]: With dead ends: 333 [2022-11-22 01:52:57,357 INFO L226 Difference]: Without dead ends: 329 [2022-11-22 01:52:57,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:52:57,358 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 152 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:57,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 302 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-22 01:52:57,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-22 01:52:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 315. [2022-11-22 01:52:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 233 states have (on average 1.5064377682403434) internal successors, (351), 254 states have internal predecessors, (351), 42 states have call successors, (42), 22 states have call predecessors, (42), 22 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-22 01:52:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 435 transitions. [2022-11-22 01:52:57,382 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 435 transitions. Word has length 29 [2022-11-22 01:52:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:57,382 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 435 transitions. [2022-11-22 01:52:57,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 01:52:57,383 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 435 transitions. [2022-11-22 01:52:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 01:52:57,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:57,385 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:57,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:52:57,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __create_pipeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-22 01:52:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:57,386 INFO L85 PathProgramCache]: Analyzing trace with hash 365415790, now seen corresponding path program 1 times [2022-11-22 01:52:57,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:52:57,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406341705] [2022-11-22 01:52:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:57,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:52:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:57,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:52:57,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406341705] [2022-11-22 01:52:57,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406341705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:57,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:57,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:52:57,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731061898] [2022-11-22 01:52:57,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:57,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:52:57,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:52:57,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:52:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:52:57,704 INFO L87 Difference]: Start difference. First operand 315 states and 435 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:52:59,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:00,038 INFO L93 Difference]: Finished difference Result 783 states and 1109 transitions. [2022-11-22 01:53:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:53:00,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-11-22 01:53:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:00,042 INFO L225 Difference]: With dead ends: 783 [2022-11-22 01:53:00,043 INFO L226 Difference]: Without dead ends: 469 [2022-11-22 01:53:00,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:53:00,045 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 112 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:00,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 463 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 01:53:00,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-11-22 01:53:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 319. [2022-11-22 01:53:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 237 states have (on average 1.4978902953586497) internal successors, (355), 258 states have internal predecessors, (355), 42 states have call successors, (42), 22 states have call predecessors, (42), 22 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-22 01:53:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 439 transitions. [2022-11-22 01:53:00,108 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 439 transitions. Word has length 40 [2022-11-22 01:53:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:00,109 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 439 transitions. [2022-11-22 01:53:00,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:53:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 439 transitions. [2022-11-22 01:53:00,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 01:53:00,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:00,113 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:00,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:53:00,114 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-22 01:53:00,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:00,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1989248012, now seen corresponding path program 1 times [2022-11-22 01:53:00,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:00,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077186488] [2022-11-22 01:53:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:00,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:53:00,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:00,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077186488] [2022-11-22 01:53:00,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077186488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:53:00,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:53:00,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:53:00,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462973417] [2022-11-22 01:53:00,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:53:00,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:53:00,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:00,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:53:00,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:53:00,429 INFO L87 Difference]: Start difference. First operand 319 states and 439 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:53:01,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:01,943 INFO L93 Difference]: Finished difference Result 674 states and 920 transitions. [2022-11-22 01:53:01,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:53:01,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-11-22 01:53:01,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:01,946 INFO L225 Difference]: With dead ends: 674 [2022-11-22 01:53:01,946 INFO L226 Difference]: Without dead ends: 356 [2022-11-22 01:53:01,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:53:01,948 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 138 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:01,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 224 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 01:53:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-22 01:53:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 328. [2022-11-22 01:53:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 237 states have (on average 1.4683544303797469) internal successors, (348), 258 states have internal predecessors, (348), 43 states have call successors, (43), 30 states have call predecessors, (43), 30 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-22 01:53:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 434 transitions. [2022-11-22 01:53:01,997 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 434 transitions. Word has length 42 [2022-11-22 01:53:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:01,998 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 434 transitions. [2022-11-22 01:53:01,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:53:01,998 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 434 transitions. [2022-11-22 01:53:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 01:53:02,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:02,007 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:02,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:53:02,008 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-22 01:53:02,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1267819688, now seen corresponding path program 1 times [2022-11-22 01:53:02,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:02,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706562129] [2022-11-22 01:53:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:02,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:53:02,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:02,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706562129] [2022-11-22 01:53:02,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706562129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:53:02,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:53:02,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:53:02,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629769452] [2022-11-22 01:53:02,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:53:02,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:53:02,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:53:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:53:02,197 INFO L87 Difference]: Start difference. First operand 328 states and 434 transitions. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 01:53:05,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:05,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:05,292 INFO L93 Difference]: Finished difference Result 655 states and 873 transitions. [2022-11-22 01:53:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:53:05,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-22 01:53:05,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:05,296 INFO L225 Difference]: With dead ends: 655 [2022-11-22 01:53:05,296 INFO L226 Difference]: Without dead ends: 337 [2022-11-22 01:53:05,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:53:05,297 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 1 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:05,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 277 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-22 01:53:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-22 01:53:05,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2022-11-22 01:53:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 246 states have (on average 1.451219512195122) internal successors, (357), 267 states have internal predecessors, (357), 43 states have call successors, (43), 30 states have call predecessors, (43), 30 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-22 01:53:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 443 transitions. [2022-11-22 01:53:05,320 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 443 transitions. Word has length 44 [2022-11-22 01:53:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:05,320 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 443 transitions. [2022-11-22 01:53:05,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 01:53:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 443 transitions. [2022-11-22 01:53:05,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 01:53:05,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:05,322 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:05,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:53:05,323 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __create_pipeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-22 01:53:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash 843743992, now seen corresponding path program 1 times [2022-11-22 01:53:05,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:05,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418878103] [2022-11-22 01:53:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:05,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:53:05,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:05,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418878103] [2022-11-22 01:53:05,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418878103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:53:05,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:53:05,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:53:05,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616964405] [2022-11-22 01:53:05,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:53:05,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:53:05,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:53:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:53:05,555 INFO L87 Difference]: Start difference. First operand 337 states and 443 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 01:53:07,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:09,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:11,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:11,045 INFO L93 Difference]: Finished difference Result 844 states and 1148 transitions. [2022-11-22 01:53:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:53:11,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-11-22 01:53:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:11,048 INFO L225 Difference]: With dead ends: 844 [2022-11-22 01:53:11,048 INFO L226 Difference]: Without dead ends: 517 [2022-11-22 01:53:11,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:53:11,050 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 92 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:11,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 356 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-22 01:53:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-11-22 01:53:11,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 387. [2022-11-22 01:53:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 290 states have (on average 1.4448275862068964) internal successors, (419), 311 states have internal predecessors, (419), 49 states have call successors, (49), 30 states have call predecessors, (49), 30 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-22 01:53:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 517 transitions. [2022-11-22 01:53:11,077 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 517 transitions. Word has length 46 [2022-11-22 01:53:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:11,078 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 517 transitions. [2022-11-22 01:53:11,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-22 01:53:11,078 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 517 transitions. [2022-11-22 01:53:11,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 01:53:11,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:11,079 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:11,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:53:11,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-22 01:53:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:11,080 INFO L85 PathProgramCache]: Analyzing trace with hash -325977905, now seen corresponding path program 1 times [2022-11-22 01:53:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:11,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002382062] [2022-11-22 01:53:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:11,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:53:11,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:11,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002382062] [2022-11-22 01:53:11,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002382062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:53:11,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:53:11,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:53:11,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125490074] [2022-11-22 01:53:11,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:53:11,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:53:11,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:11,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:53:11,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:53:11,269 INFO L87 Difference]: Start difference. First operand 387 states and 517 transitions. Second operand has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 01:53:13,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:13,442 INFO L93 Difference]: Finished difference Result 387 states and 517 transitions. [2022-11-22 01:53:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:53:13,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2022-11-22 01:53:13,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:13,445 INFO L225 Difference]: With dead ends: 387 [2022-11-22 01:53:13,446 INFO L226 Difference]: Without dead ends: 386 [2022-11-22 01:53:13,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:53:13,446 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:13,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 275 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-22 01:53:13,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-22 01:53:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2022-11-22 01:53:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 290 states have (on average 1.4344827586206896) internal successors, (416), 310 states have internal predecessors, (416), 49 states have call successors, (49), 30 states have call predecessors, (49), 30 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-22 01:53:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 514 transitions. [2022-11-22 01:53:13,470 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 514 transitions. Word has length 47 [2022-11-22 01:53:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:13,470 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 514 transitions. [2022-11-22 01:53:13,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 01:53:13,471 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 514 transitions. [2022-11-22 01:53:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 01:53:13,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:13,472 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:13,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:53:13,472 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-22 01:53:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1515380386, now seen corresponding path program 1 times [2022-11-22 01:53:13,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:13,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801763430] [2022-11-22 01:53:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:13,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:53:13,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:13,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801763430] [2022-11-22 01:53:13,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801763430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:13,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113062876] [2022-11-22 01:53:13,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:13,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:13,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:13,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:13,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:53:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:14,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:53:14,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:53:14,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:53:14,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113062876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:53:14,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:53:14,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3] total 8 [2022-11-22 01:53:14,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395287226] [2022-11-22 01:53:14,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:53:14,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:53:14,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:53:14,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:53:14,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:53:14,316 INFO L87 Difference]: Start difference. First operand 386 states and 514 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:53:16,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:16,785 INFO L93 Difference]: Finished difference Result 706 states and 942 transitions. [2022-11-22 01:53:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:53:16,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2022-11-22 01:53:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:16,789 INFO L225 Difference]: With dead ends: 706 [2022-11-22 01:53:16,789 INFO L226 Difference]: Without dead ends: 472 [2022-11-22 01:53:16,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:53:16,790 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 130 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:16,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 765 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-22 01:53:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-11-22 01:53:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 390. [2022-11-22 01:53:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 292 states have (on average 1.4315068493150684) internal successors, (418), 312 states have internal predecessors, (418), 51 states have call successors, (51), 30 states have call predecessors, (51), 30 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-11-22 01:53:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 520 transitions. [2022-11-22 01:53:16,818 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 520 transitions. Word has length 48 [2022-11-22 01:53:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:16,819 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 520 transitions. [2022-11-22 01:53:16,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:53:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 520 transitions. [2022-11-22 01:53:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 01:53:16,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:16,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:16,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 01:53:17,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:53:17,028 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __create_pipeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [flexcop_usb_transfer_exitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, flexcop_usb_transfer_exitErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2022-11-22 01:53:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash -429017715, now seen corresponding path program 1 times [2022-11-22 01:53:17,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:53:17,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181700197] [2022-11-22 01:53:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:17,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:53:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:53:17,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:53:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181700197] [2022-11-22 01:53:17,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181700197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:53:17,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248270414] [2022-11-22 01:53:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:17,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:17,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:17,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:17,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b37443-accd-4c4c-a0fa-426807c6a3fa/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:53:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:17,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:53:17,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:53:17,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:53:17,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248270414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:17,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1544190866] [2022-11-22 01:53:17,921 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2022-11-22 01:53:17,921 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:53:17,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:53:17,929 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:53:17,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:53:25,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:53:25,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:53:26,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:26,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:26,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:26,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:26,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:26,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:27,669 INFO L321 Elim1Store]: treesize reduction 1042, result has 25.7 percent of original size [2022-11-22 01:53:27,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 50 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 11 case distinctions, treesize of input 162 treesize of output 380 [2022-11-22 01:53:29,822 INFO L321 Elim1Store]: treesize reduction 56, result has 33.3 percent of original size [2022-11-22 01:53:29,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 38 [2022-11-22 01:53:30,566 INFO L321 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2022-11-22 01:53:30,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 42 [2022-11-22 01:53:30,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:30,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:30,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:30,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,281 INFO L321 Elim1Store]: treesize reduction 579, result has 28.3 percent of original size [2022-11-22 01:53:31,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 19 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 108 treesize of output 249 [2022-11-22 01:53:31,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:31,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:31,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:32,425 INFO L321 Elim1Store]: treesize reduction 1028, result has 26.9 percent of original size [2022-11-22 01:53:32,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 63 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 11 case distinctions, treesize of input 166 treesize of output 398 [2022-11-22 01:53:32,593 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 22