./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4e7fbc69 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_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW --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 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a --- 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-4e7fbc6 [2022-11-23 14:29:05,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:29:05,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:29:05,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:29:05,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:29:05,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:29:05,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:29:05,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:29:05,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:29:05,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:29:05,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:29:05,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:29:05,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:29:05,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:29:05,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:29:05,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:29:05,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:29:05,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:29:05,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:29:05,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:29:05,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:29:05,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:29:05,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:29:05,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:29:05,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:29:05,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:29:05,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:29:05,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:29:05,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:29:05,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:29:05,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:29:05,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:29:05,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:29:05,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:29:05,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:29:05,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:29:05,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:29:05,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:29:05,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:29:05,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:29:05,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:29:05,654 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-23 14:29:05,687 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:29:05,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:29:05,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:29:05,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:29:05,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:29:05,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:29:05,689 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:29:05,690 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:29:05,690 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:29:05,690 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:29:05,691 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:29:05,691 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:29:05,691 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:29:05,692 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:29:05,692 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:29:05,692 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:29:05,692 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:29:05,693 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:29:05,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:29:05,694 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:29:05,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:29:05,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:29:05,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:29:05,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:29:05,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:29:05,695 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-23 14:29:05,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:29:05,696 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:29:05,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:29:05,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:29:05,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:29:05,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:29:05,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:29:05,697 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:29:05,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:29:05,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:29:05,698 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:29:05,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:29:05,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:29:05,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:29:05,699 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_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a [2022-11-23 14:29:05,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:29:05,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:29:05,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:29:05,998 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:29:05,999 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:29:06,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2022-11-23 14:29:08,995 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:29:09,211 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:29:09,212 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2022-11-23 14:29:09,220 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/data/66ff772ba/fec8c4b06d474dc2be235e1f92de067c/FLAG1c00e856e [2022-11-23 14:29:09,248 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/data/66ff772ba/fec8c4b06d474dc2be235e1f92de067c [2022-11-23 14:29:09,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:29:09,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:29:09,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:29:09,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:29:09,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:29:09,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b60c896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09, skipping insertion in model container [2022-11-23 14:29:09,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:29:09,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:29:09,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:29:09,429 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:29:09,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:29:09,448 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:29:09,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09 WrapperNode [2022-11-23 14:29:09,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:29:09,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:29:09,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:29:09,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:29:09,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,472 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2022-11-23 14:29:09,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:29:09,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:29:09,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:29:09,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:29:09,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:29:09,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:29:09,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:29:09,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:29:09,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (1/1) ... [2022-11-23 14:29:09,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:29:09,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:09,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:29:09,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:29:09,572 INFO L130 BoogieDeclarations]: Found specification of procedure g [2022-11-23 14:29:09,572 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2022-11-23 14:29:09,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:29:09,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:29:09,632 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:29:09,635 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:29:09,777 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:29:09,790 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:29:09,791 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:29:09,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:29:09 BoogieIcfgContainer [2022-11-23 14:29:09,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:29:09,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:29:09,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:29:09,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:29:09,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:29:09" (1/3) ... [2022-11-23 14:29:09,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233e770c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:29:09, skipping insertion in model container [2022-11-23 14:29:09,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:29:09" (2/3) ... [2022-11-23 14:29:09,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233e770c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:29:09, skipping insertion in model container [2022-11-23 14:29:09,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:29:09" (3/3) ... [2022-11-23 14:29:09,808 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2b.c [2022-11-23 14:29:09,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:29:09,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-23 14:29:09,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:29:09,974 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;@10a92a1d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:29:09,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 14:29:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:29:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:29:09,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:09,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:29:09,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:10,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1970913107, now seen corresponding path program 1 times [2022-11-23 14:29:10,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:10,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741738016] [2022-11-23 14:29:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:10,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:10,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:10,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741738016] [2022-11-23 14:29:10,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741738016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:10,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:29:10,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:29:10,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294289110] [2022-11-23 14:29:10,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:10,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:29:10,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:10,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:29:10,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:29:10,309 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:10,414 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-11-23 14:29:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:29:10,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 14:29:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:10,426 INFO L225 Difference]: With dead ends: 42 [2022-11-23 14:29:10,426 INFO L226 Difference]: Without dead ends: 33 [2022-11-23 14:29:10,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:29:10,433 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:10,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:29:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-23 14:29:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-11-23 14:29:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:29:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-23 14:29:10,474 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 6 [2022-11-23 14:29:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:10,474 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-23 14:29:10,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-23 14:29:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:29:10,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:10,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:10,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:29:10,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash 968764211, now seen corresponding path program 1 times [2022-11-23 14:29:10,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:10,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658174274] [2022-11-23 14:29:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:10,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:10,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:10,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658174274] [2022-11-23 14:29:10,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658174274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:10,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:29:10,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:29:10,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483649098] [2022-11-23 14:29:10,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:10,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:29:10,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:29:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:29:10,542 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:10,636 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-11-23 14:29:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:29:10,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:29:10,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:10,638 INFO L225 Difference]: With dead ends: 46 [2022-11-23 14:29:10,640 INFO L226 Difference]: Without dead ends: 45 [2022-11-23 14:29:10,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:29:10,642 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:10,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 45 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:29:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-23 14:29:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-11-23 14:29:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 31 states have internal predecessors, (38), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 14:29:10,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-11-23 14:29:10,669 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 7 [2022-11-23 14:29:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:10,670 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-11-23 14:29:10,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-11-23 14:29:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:29:10,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:10,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:10,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:29:10,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1952741066, now seen corresponding path program 1 times [2022-11-23 14:29:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:10,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367213942] [2022-11-23 14:29:10,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:10,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:10,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:10,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367213942] [2022-11-23 14:29:10,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367213942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:10,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446000877] [2022-11-23 14:29:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:10,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:10,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:10,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:10,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:29:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:10,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:29:10,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:10,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:11,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446000877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:11,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1332976662] [2022-11-23 14:29:11,099 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:29:11,099 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:29:11,104 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:29:11,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:29:11,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-23 14:29:11,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856525645] [2022-11-23 14:29:11,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:29:11,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 14:29:11,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:11,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 14:29:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:29:11,109 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:11,447 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2022-11-23 14:29:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:29:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 14:29:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:11,455 INFO L225 Difference]: With dead ends: 95 [2022-11-23 14:29:11,455 INFO L226 Difference]: Without dead ends: 94 [2022-11-23 14:29:11,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:29:11,457 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 165 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:11,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 88 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:29:11,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-23 14:29:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2022-11-23 14:29:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 58 states have internal predecessors, (74), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 14:29:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2022-11-23 14:29:11,474 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 11 [2022-11-23 14:29:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:11,474 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2022-11-23 14:29:11,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2022-11-23 14:29:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:29:11,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:11,476 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:11,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 14:29:11,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:11,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:11,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:11,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1222392158, now seen corresponding path program 1 times [2022-11-23 14:29:11,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:11,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927936242] [2022-11-23 14:29:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:11,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:29:11,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927936242] [2022-11-23 14:29:11,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927936242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:11,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:29:11,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:29:11,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274705346] [2022-11-23 14:29:11,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:29:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:11,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:29:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:29:11,749 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:29:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:11,781 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2022-11-23 14:29:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:29:11,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 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 14 [2022-11-23 14:29:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:11,786 INFO L225 Difference]: With dead ends: 76 [2022-11-23 14:29:11,786 INFO L226 Difference]: Without dead ends: 75 [2022-11-23 14:29:11,786 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 [2022-11-23 14:29:11,787 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:11,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:29:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-23 14:29:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-23 14:29:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 57 states have internal predecessors, (68), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 14:29:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2022-11-23 14:29:11,813 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 14 [2022-11-23 14:29:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:11,813 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2022-11-23 14:29:11,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:29:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2022-11-23 14:29:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 14:29:11,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:11,814 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:11,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:29:11,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:11,815 INFO L85 PathProgramCache]: Analyzing trace with hash -760548722, now seen corresponding path program 1 times [2022-11-23 14:29:11,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:11,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74571108] [2022-11-23 14:29:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:11,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:29:11,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74571108] [2022-11-23 14:29:11,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74571108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:11,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:29:11,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:29:11,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778672523] [2022-11-23 14:29:11,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:11,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:29:11,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:11,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:29:11,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:29:11,862 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:29:11,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:11,914 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-11-23 14:29:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:29:11,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 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 15 [2022-11-23 14:29:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:11,920 INFO L225 Difference]: With dead ends: 115 [2022-11-23 14:29:11,920 INFO L226 Difference]: Without dead ends: 114 [2022-11-23 14:29:11,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:29:11,922 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:11,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 41 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:29:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-23 14:29:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 103. [2022-11-23 14:29:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 79 states have internal predecessors, (91), 13 states have call successors, (13), 6 states have call predecessors, (13), 10 states have return successors, (22), 17 states have call predecessors, (22), 11 states have call successors, (22) [2022-11-23 14:29:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-11-23 14:29:11,961 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 15 [2022-11-23 14:29:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:11,962 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-11-23 14:29:11,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:29:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-11-23 14:29:11,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 14:29:11,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:11,963 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:11,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:29:11,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:11,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash -942664753, now seen corresponding path program 1 times [2022-11-23 14:29:11,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:11,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971724332] [2022-11-23 14:29:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:11,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:29:12,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:12,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971724332] [2022-11-23 14:29:12,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971724332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:12,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:29:12,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:29:12,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012745969] [2022-11-23 14:29:12,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:12,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:29:12,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:29:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:29:12,066 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:29:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:12,157 INFO L93 Difference]: Finished difference Result 131 states and 172 transitions. [2022-11-23 14:29:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:29:12,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-23 14:29:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:12,160 INFO L225 Difference]: With dead ends: 131 [2022-11-23 14:29:12,160 INFO L226 Difference]: Without dead ends: 79 [2022-11-23 14:29:12,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:29:12,174 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:12,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 46 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:29:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-23 14:29:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2022-11-23 14:29:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 41 states have internal predecessors, (44), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 1 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 14:29:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-11-23 14:29:12,198 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 19 [2022-11-23 14:29:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:12,199 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-11-23 14:29:12,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:29:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-11-23 14:29:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 14:29:12,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:12,201 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:12,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:29:12,203 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:12,204 INFO L85 PathProgramCache]: Analyzing trace with hash 842163767, now seen corresponding path program 1 times [2022-11-23 14:29:12,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:12,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756519036] [2022-11-23 14:29:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:12,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:29:12,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:12,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756519036] [2022-11-23 14:29:12,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756519036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:29:12,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:29:12,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:29:12,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569115580] [2022-11-23 14:29:12,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:29:12,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:29:12,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:12,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:29:12,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:29:12,293 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:29:12,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:12,385 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-11-23 14:29:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:29:12,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-23 14:29:12,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:12,387 INFO L225 Difference]: With dead ends: 55 [2022-11-23 14:29:12,387 INFO L226 Difference]: Without dead ends: 54 [2022-11-23 14:29:12,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:29:12,388 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:12,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:29:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-23 14:29:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2022-11-23 14:29:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:29:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-11-23 14:29:12,397 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 20 [2022-11-23 14:29:12,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:12,397 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-11-23 14:29:12,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:29:12,398 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-11-23 14:29:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 14:29:12,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:12,399 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:12,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:29:12,399 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:12,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1773314618, now seen corresponding path program 2 times [2022-11-23 14:29:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:12,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321164013] [2022-11-23 14:29:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:12,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:29:12,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:12,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321164013] [2022-11-23 14:29:12,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321164013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:12,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375088519] [2022-11-23 14:29:12,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:29:12,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:12,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:12,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:12,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:29:12,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:29:12,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:29:12,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:29:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:29:12,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:29:12,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375088519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:12,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1774473028] [2022-11-23 14:29:12,665 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:29:12,665 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:29:12,665 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:29:12,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:29:12,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-23 14:29:12,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387009129] [2022-11-23 14:29:12,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:29:12,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 14:29:12,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:12,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 14:29:12,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:29:12,670 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:29:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:12,972 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2022-11-23 14:29:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 14:29:12,972 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-11-23 14:29:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:12,975 INFO L225 Difference]: With dead ends: 90 [2022-11-23 14:29:12,975 INFO L226 Difference]: Without dead ends: 75 [2022-11-23 14:29:12,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:29:12,978 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:12,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 64 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:29:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-23 14:29:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2022-11-23 14:29:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 37 states have internal predecessors, (39), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 1 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:29:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-11-23 14:29:13,003 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 24 [2022-11-23 14:29:13,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:13,004 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-11-23 14:29:13,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:29:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-11-23 14:29:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 14:29:13,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:13,005 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1] [2022-11-23 14:29:13,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:13,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 14:29:13,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash 719016723, now seen corresponding path program 2 times [2022-11-23 14:29:13,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:13,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491256180] [2022-11-23 14:29:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:13,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:13,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:13,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491256180] [2022-11-23 14:29:13,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491256180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:13,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631603400] [2022-11-23 14:29:13,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:29:13,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:13,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:13,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:13,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:29:13,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 14:29:13,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:29:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:29:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:13,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:13,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631603400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:13,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640019005] [2022-11-23 14:29:13,697 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:29:13,697 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:29:13,698 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:29:13,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:29:13,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-23 14:29:13,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485182868] [2022-11-23 14:29:13,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:29:13,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 14:29:13,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:13,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 14:29:13,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:29:13,700 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 14 states have internal predecessors, (41), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:14,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:14,162 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2022-11-23 14:29:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 14:29:14,162 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 14 states have internal predecessors, (41), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-23 14:29:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:14,165 INFO L225 Difference]: With dead ends: 146 [2022-11-23 14:29:14,165 INFO L226 Difference]: Without dead ends: 145 [2022-11-23 14:29:14,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 14:29:14,168 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 283 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:14,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 104 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:29:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-23 14:29:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 88. [2022-11-23 14:29:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.171875) internal successors, (75), 73 states have internal predecessors, (75), 13 states have call successors, (13), 13 states have call predecessors, (13), 10 states have return successors, (10), 1 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 14:29:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2022-11-23 14:29:14,193 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 26 [2022-11-23 14:29:14,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:14,194 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2022-11-23 14:29:14,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 14 states have internal predecessors, (41), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:14,195 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2022-11-23 14:29:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 14:29:14,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:14,201 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:14,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:14,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 14:29:14,406 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:14,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1087803791, now seen corresponding path program 3 times [2022-11-23 14:29:14,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:14,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180861747] [2022-11-23 14:29:14,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:14,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:29:14,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180861747] [2022-11-23 14:29:14,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180861747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827698460] [2022-11-23 14:29:14,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:29:14,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:14,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:14,588 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:14,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:29:14,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:29:14,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:29:14,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:29:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 59 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:29:14,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 59 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:29:14,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827698460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:14,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155756035] [2022-11-23 14:29:14,809 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 14:29:14,809 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:29:14,809 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:29:14,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:29:14,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 22 [2022-11-23 14:29:14,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467074121] [2022-11-23 14:29:14,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:29:14,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 14:29:14,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:14,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 14:29:14,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:29:14,813 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 14 states have internal predecessors, (50), 10 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:29:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:14,989 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2022-11-23 14:29:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:29:14,989 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 14 states have internal predecessors, (50), 10 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-11-23 14:29:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:14,991 INFO L225 Difference]: With dead ends: 133 [2022-11-23 14:29:14,991 INFO L226 Difference]: Without dead ends: 57 [2022-11-23 14:29:14,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-11-23 14:29:14,992 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:14,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 79 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:29:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-23 14:29:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-23 14:29:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-11-23 14:29:15,002 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 39 [2022-11-23 14:29:15,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:15,003 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-11-23 14:29:15,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 14 states have internal predecessors, (50), 10 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:29:15,003 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-11-23 14:29:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-23 14:29:15,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:15,008 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1] [2022-11-23 14:29:15,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:15,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:15,214 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:15,214 INFO L85 PathProgramCache]: Analyzing trace with hash 17554611, now seen corresponding path program 3 times [2022-11-23 14:29:15,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:15,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679363944] [2022-11-23 14:29:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:15,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:15,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679363944] [2022-11-23 14:29:15,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679363944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351293021] [2022-11-23 14:29:15,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:29:15,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:15,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:15,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:15,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:29:15,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:29:15,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:29:15,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:29:15,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:15,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:16,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351293021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:16,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [823642087] [2022-11-23 14:29:16,515 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:29:16,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:29:16,515 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:29:16,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:29:16,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-11-23 14:29:16,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778838068] [2022-11-23 14:29:16,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:29:16,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-23 14:29:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:16,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-23 14:29:16,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:29:16,518 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 48 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 26 states have internal predecessors, (89), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:17,208 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2022-11-23 14:29:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 14:29:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 26 states have internal predecessors, (89), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-23 14:29:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:17,209 INFO L225 Difference]: With dead ends: 120 [2022-11-23 14:29:17,209 INFO L226 Difference]: Without dead ends: 119 [2022-11-23 14:29:17,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2022-11-23 14:29:17,212 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 339 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:17,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 15 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:29:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-23 14:29:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-11-23 14:29:17,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-11-23 14:29:17,226 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 56 [2022-11-23 14:29:17,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:17,227 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-11-23 14:29:17,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 26 states have internal predecessors, (89), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:17,227 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-11-23 14:29:17,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 14:29:17,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:17,228 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1] [2022-11-23 14:29:17,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 14:29:17,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:17,434 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash -226678797, now seen corresponding path program 4 times [2022-11-23 14:29:17,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:17,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481360128] [2022-11-23 14:29:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:17,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:19,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:19,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481360128] [2022-11-23 14:29:19,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481360128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:19,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409220521] [2022-11-23 14:29:19,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:29:19,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:19,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:19,102 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:19,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:29:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:19,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 14:29:19,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:19,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:21,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409220521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:21,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148544713] [2022-11-23 14:29:21,709 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:29:21,710 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:29:21,710 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:29:21,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:29:21,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-11-23 14:29:21,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652832111] [2022-11-23 14:29:21,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:29:21,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-23 14:29:21,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-23 14:29:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2022-11-23 14:29:21,717 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 96 states, 93 states have (on average 1.989247311827957) internal successors, (185), 50 states have internal predecessors, (185), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:23,822 INFO L93 Difference]: Finished difference Result 240 states and 263 transitions. [2022-11-23 14:29:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-23 14:29:23,823 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 1.989247311827957) internal successors, (185), 50 states have internal predecessors, (185), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-23 14:29:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:23,826 INFO L225 Difference]: With dead ends: 240 [2022-11-23 14:29:23,826 INFO L226 Difference]: Without dead ends: 239 [2022-11-23 14:29:23,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5549, Invalid=14473, Unknown=0, NotChecked=0, Total=20022 [2022-11-23 14:29:23,833 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 743 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:23,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 17 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:29:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-23 14:29:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2022-11-23 14:29:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 189 states have (on average 1.0052910052910053) internal successors, (190), 189 states have internal predecessors, (190), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2022-11-23 14:29:23,861 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 116 [2022-11-23 14:29:23,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:23,862 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2022-11-23 14:29:23,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 1.989247311827957) internal successors, (185), 50 states have internal predecessors, (185), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2022-11-23 14:29:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-23 14:29:23,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:23,872 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1] [2022-11-23 14:29:23,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:24,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:29:24,079 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:24,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1275552141, now seen corresponding path program 5 times [2022-11-23 14:29:24,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:24,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865452763] [2022-11-23 14:29:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:24,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:29,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:29,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865452763] [2022-11-23 14:29:29,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865452763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:29,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266495999] [2022-11-23 14:29:29,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:29:29,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:29,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:29,729 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:29,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:29:29,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-23 14:29:29,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:29:29,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-23 14:29:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:29:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:30,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:29:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:38,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266495999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:29:38,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081559396] [2022-11-23 14:29:38,291 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:29:38,291 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:29:38,291 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:29:38,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:29:38,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2022-11-23 14:29:38,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210096103] [2022-11-23 14:29:38,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:29:38,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-11-23 14:29:38,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:29:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-11-23 14:29:38,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2022-11-23 14:29:38,308 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand has 192 states, 189 states have (on average 1.9947089947089947) internal successors, (377), 98 states have internal predecessors, (377), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:45,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:45,797 INFO L93 Difference]: Finished difference Result 480 states and 527 transitions. [2022-11-23 14:29:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-23 14:29:45,798 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 189 states have (on average 1.9947089947089947) internal successors, (377), 98 states have internal predecessors, (377), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2022-11-23 14:29:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:45,801 INFO L225 Difference]: With dead ends: 480 [2022-11-23 14:29:45,801 INFO L226 Difference]: Without dead ends: 479 [2022-11-23 14:29:45,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17484 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=22613, Invalid=58897, Unknown=0, NotChecked=0, Total=81510 [2022-11-23 14:29:45,812 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1737 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:45,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1737 Valid, 28 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:29:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-23 14:29:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2022-11-23 14:29:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 381 states have (on average 1.0026246719160106) internal successors, (382), 381 states have internal predecessors, (382), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 477 transitions. [2022-11-23 14:29:45,854 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 477 transitions. Word has length 236 [2022-11-23 14:29:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:45,854 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 477 transitions. [2022-11-23 14:29:45,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 189 states have (on average 1.9947089947089947) internal successors, (377), 98 states have internal predecessors, (377), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:29:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 477 transitions. [2022-11-23 14:29:45,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-11-23 14:29:45,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:45,864 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 94, 94, 94, 1, 1, 1, 1] [2022-11-23 14:29:45,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:29:46,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:46,075 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:29:46,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash -669840525, now seen corresponding path program 6 times [2022-11-23 14:29:46,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:46,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338441201] [2022-11-23 14:29:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:46,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:30:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:05,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:30:05,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338441201] [2022-11-23 14:30:05,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338441201] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:30:05,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429475396] [2022-11-23 14:30:05,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:30:05,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:30:05,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:30:05,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:30:05,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:30:06,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:30:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:30:06,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-23 14:30:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:30:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:07,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:30:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429475396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:30:36,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1618670606] [2022-11-23 14:30:36,645 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:30:36,645 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:30:36,646 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:30:36,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:30:36,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2022-11-23 14:30:36,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232441961] [2022-11-23 14:30:36,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:30:36,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2022-11-23 14:30:36,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:30:36,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2022-11-23 14:30:36,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36676, Invalid=110396, Unknown=0, NotChecked=0, Total=147072 [2022-11-23 14:30:36,666 INFO L87 Difference]: Start difference. First operand 477 states and 477 transitions. Second operand has 384 states, 381 states have (on average 1.9973753280839894) internal successors, (761), 194 states have internal predecessors, (761), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:31:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:31:14,294 INFO L93 Difference]: Finished difference Result 960 states and 1055 transitions. [2022-11-23 14:31:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-23 14:31:14,296 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 381 states have (on average 1.9973753280839894) internal successors, (761), 194 states have internal predecessors, (761), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 476 [2022-11-23 14:31:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:31:14,301 INFO L225 Difference]: With dead ends: 960 [2022-11-23 14:31:14,301 INFO L226 Difference]: Without dead ends: 959 [2022-11-23 14:31:14,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1332 GetRequests, 759 SyntacticMatches, 1 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71820 ImplicationChecksByTransitivity, 61.0s TimeCoverageRelationStatistics Valid=91301, Invalid=237601, Unknown=0, NotChecked=0, Total=328902 [2022-11-23 14:31:14,331 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4011 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4011 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:31:14,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4011 Valid, 22 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1743 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 14:31:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-11-23 14:31:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 957. [2022-11-23 14:31:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 765 states have (on average 1.0013071895424837) internal successors, (766), 765 states have internal predecessors, (766), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:31:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 957 transitions. [2022-11-23 14:31:14,436 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 957 transitions. Word has length 476 [2022-11-23 14:31:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:31:14,437 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 957 transitions. [2022-11-23 14:31:14,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 381 states have (on average 1.9973753280839894) internal successors, (761), 194 states have internal predecessors, (761), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:31:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 957 transitions. [2022-11-23 14:31:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2022-11-23 14:31:14,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:31:14,484 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 190, 190, 190, 1, 1, 1, 1] [2022-11-23 14:31:14,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:31:14,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:31:14,691 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:31:14,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:31:14,691 INFO L85 PathProgramCache]: Analyzing trace with hash 450225523, now seen corresponding path program 7 times [2022-11-23 14:31:14,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:31:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52529863] [2022-11-23 14:31:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:31:14,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:31:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 90345 backedges. 0 proven. 90345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:32:47,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:47,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52529863] [2022-11-23 14:32:47,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52529863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:47,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056846684] [2022-11-23 14:32:47,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:32:47,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:47,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:47,463 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:47,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:32:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:47,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 384 conjunts are in the unsatisfiable core [2022-11-23 14:32:47,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 90345 backedges. 0 proven. 90345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:32:49,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 90345 backedges. 0 proven. 90345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:46,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056846684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:46,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268975247] [2022-11-23 14:34:46,651 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:34:46,652 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:34:46,652 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:34:46,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:34:46,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2022-11-23 14:34:46,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576665688] [2022-11-23 14:34:46,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:34:46,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2022-11-23 14:34:46,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:46,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2022-11-23 14:34:46,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147076, Invalid=441980, Unknown=0, NotChecked=0, Total=589056 [2022-11-23 14:34:46,742 INFO L87 Difference]: Start difference. First operand 957 states and 957 transitions. Second operand has 768 states, 765 states have (on average 1.9986928104575163) internal successors, (1529), 386 states have internal predecessors, (1529), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:23,643 INFO L93 Difference]: Finished difference Result 1920 states and 2111 transitions. [2022-11-23 14:40:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-11-23 14:40:23,645 INFO L78 Accepts]: Start accepts. Automaton has has 768 states, 765 states have (on average 1.9986928104575163) internal successors, (1529), 386 states have internal predecessors, (1529), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 956 [2022-11-23 14:40:23,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:23,655 INFO L225 Difference]: With dead ends: 1920 [2022-11-23 14:40:23,655 INFO L226 Difference]: Without dead ends: 1919 [2022-11-23 14:40:23,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2676 GetRequests, 1527 SyntacticMatches, 1 SemanticMatches, 1148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291084 ImplicationChecksByTransitivity, 245.4s TimeCoverageRelationStatistics Valid=366917, Invalid=954433, Unknown=0, NotChecked=0, Total=1321350 [2022-11-23 14:40:23,934 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12703 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3465 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12703 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 3668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 3465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:23,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12703 Valid, 17 Invalid, 3668 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [203 Valid, 3465 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 14:40:23,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2022-11-23 14:40:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1917. [2022-11-23 14:40:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1533 states have (on average 1.000652315720809) internal successors, (1534), 1533 states have internal predecessors, (1534), 383 states have call successors, (383), 383 states have call predecessors, (383), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 1917 transitions. [2022-11-23 14:40:24,096 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 1917 transitions. Word has length 956 [2022-11-23 14:40:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:24,098 INFO L495 AbstractCegarLoop]: Abstraction has 1917 states and 1917 transitions. [2022-11-23 14:40:24,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 768 states, 765 states have (on average 1.9986928104575163) internal successors, (1529), 386 states have internal predecessors, (1529), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 1917 transitions. [2022-11-23 14:40:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1917 [2022-11-23 14:40:24,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:24,133 INFO L195 NwaCegarLoop]: trace histogram [383, 383, 382, 382, 382, 1, 1, 1, 1] [2022-11-23 14:40:24,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:24,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebc0097-1464-4fce-a56a-9b2e17e39ef1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:40:24,339 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-23 14:40:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:24,340 INFO L85 PathProgramCache]: Analyzing trace with hash 982751603, now seen corresponding path program 8 times [2022-11-23 14:40:24,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:24,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073323683] [2022-11-23 14:40:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:24,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat