./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:03:33,481 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:03:33,577 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-10-31 22:03:33,586 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:03:33,586 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:03:33,611 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:03:33,611 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:03:33,612 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:03:33,612 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:03:33,613 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:03:33,613 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:03:33,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:03:33,614 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:03:33,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:03:33,615 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:03:33,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:03:33,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:03:33,617 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:03:33,617 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:03:33,618 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:03:33,618 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:03:33,622 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:03:33,622 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:03:33,622 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:03:33,623 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:03:33,623 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-10-31 22:03:33,623 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:03:33,624 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:03:33,624 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:03:33,624 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:03:33,624 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:03:33,625 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:03:33,625 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:03:33,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:03:33,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:03:33,627 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:03:33,627 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:03:33,627 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:03:33,627 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:03:33,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:03:33,628 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:03:33,629 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:03:33,629 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:03:33,630 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:03:33,630 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 [2024-10-31 22:03:33,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:03:33,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:03:33,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:03:33,929 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:03:33,930 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:03:33,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c Unable to find full path for "g++" [2024-10-31 22:03:35,933 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:03:36,113 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:03:36,114 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2024-10-31 22:03:36,122 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/data/9daf50d6e/1f73ae34b8104f748544e1291e01a295/FLAGf4fb9bc81 [2024-10-31 22:03:36,142 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/data/9daf50d6e/1f73ae34b8104f748544e1291e01a295 [2024-10-31 22:03:36,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:03:36,145 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:03:36,147 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:03:36,147 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:03:36,153 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:03:36,154 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ba82a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36, skipping insertion in model container [2024-10-31 22:03:36,155 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,181 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:03:36,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:03:36,452 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:03:36,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:03:36,516 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:03:36,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36 WrapperNode [2024-10-31 22:03:36,516 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:03:36,517 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:03:36,518 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:03:36,518 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:03:36,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,567 INFO L138 Inliner]: procedures = 17, calls = 142, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 159 [2024-10-31 22:03:36,572 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:03:36,573 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:03:36,573 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:03:36,573 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:03:36,589 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,594 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,630 INFO L175 MemorySlicer]: Split 86 memory accesses to 13 slices as follows [2, 9, 12, 5, 8, 5, 8, 7, 10, 7, 7, 3, 3]. 14 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. The 22 writes are split as follows [0, 1, 1, 2, 2, 2, 2, 3, 2, 3, 2, 1, 1]. [2024-10-31 22:03:36,630 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,631 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,642 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,644 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,647 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,649 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:03:36,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:03:36,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:03:36,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:03:36,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (1/1) ... [2024-10-31 22:03:36,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:03:36,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:36,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:03:36,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:03:36,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:03:36,730 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-31 22:03:36,730 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-31 22:03:36,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:03:36,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:03:36,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:03:36,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 22:03:36,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-31 22:03:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-31 22:03:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-31 22:03:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-31 22:03:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-10-31 22:03:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-10-31 22:03:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-10-31 22:03:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-10-31 22:03:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-10-31 22:03:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:03:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:03:36,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:03:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:03:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 22:03:36,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-31 22:03:36,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-31 22:03:36,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-31 22:03:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-31 22:03:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-10-31 22:03:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-10-31 22:03:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-10-31 22:03:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-10-31 22:03:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-10-31 22:03:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_45_to_53_0 [2024-10-31 22:03:36,741 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_45_to_53_0 [2024-10-31 22:03:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_65_0 [2024-10-31 22:03:36,741 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_65_0 [2024-10-31 22:03:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:03:36,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:03:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:03:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:03:36,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:03:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 22:03:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-31 22:03:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-31 22:03:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-31 22:03:36,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-31 22:03:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-10-31 22:03:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-10-31 22:03:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-10-31 22:03:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-10-31 22:03:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-10-31 22:03:36,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 22:03:36,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 22:03:36,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:03:36,951 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:03:36,953 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:03:38,222 INFO L? ?]: Removed 217 outVars from TransFormulas that were not future-live. [2024-10-31 22:03:38,222 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:03:38,247 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:03:38,248 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:03:38,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:03:38 BoogieIcfgContainer [2024-10-31 22:03:38,249 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:03:38,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:03:38,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:03:38,256 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:03:38,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:03:36" (1/3) ... [2024-10-31 22:03:38,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526bfb3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:03:38, skipping insertion in model container [2024-10-31 22:03:38,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:03:36" (2/3) ... [2024-10-31 22:03:38,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526bfb3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:03:38, skipping insertion in model container [2024-10-31 22:03:38,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:03:38" (3/3) ... [2024-10-31 22:03:38,261 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd2-ll.c [2024-10-31 22:03:38,281 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:03:38,281 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2024-10-31 22:03:38,367 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:03:38,378 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@60ccbe45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:03:38,378 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2024-10-31 22:03:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 179 states, 96 states have (on average 1.7291666666666667) internal successors, (166), 162 states have internal predecessors, (166), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-31 22:03:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-31 22:03:38,394 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:38,395 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:38,397 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-10-31 22:03:38,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:38,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1406924726, now seen corresponding path program 1 times [2024-10-31 22:03:38,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:38,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552251111] [2024-10-31 22:03:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:38,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:38,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:03:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:38,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:03:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:03:38,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:38,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552251111] [2024-10-31 22:03:38,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552251111] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:38,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:38,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:03:38,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566755973] [2024-10-31 22:03:38,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:38,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:03:38,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:38,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:03:38,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:03:38,895 INFO L87 Difference]: Start difference. First operand has 179 states, 96 states have (on average 1.7291666666666667) internal successors, (166), 162 states have internal predecessors, (166), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:03:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:38,987 INFO L93 Difference]: Finished difference Result 354 states and 397 transitions. [2024-10-31 22:03:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:03:38,992 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-10-31 22:03:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:39,007 INFO L225 Difference]: With dead ends: 354 [2024-10-31 22:03:39,007 INFO L226 Difference]: Without dead ends: 172 [2024-10-31 22:03:39,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:03:39,017 INFO L432 NwaCegarLoop]: 189 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:39,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:03:39,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-10-31 22:03:39,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2024-10-31 22:03:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 91 states have (on average 1.7142857142857142) internal successors, (156), 156 states have internal predecessors, (156), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 22:03:39,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 182 transitions. [2024-10-31 22:03:39,092 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 182 transitions. Word has length 15 [2024-10-31 22:03:39,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:39,096 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 182 transitions. [2024-10-31 22:03:39,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:03:39,096 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 182 transitions. [2024-10-31 22:03:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-31 22:03:39,098 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:39,098 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:39,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:03:39,098 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-10-31 22:03:39,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:39,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2109836346, now seen corresponding path program 1 times [2024-10-31 22:03:39,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:39,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492938466] [2024-10-31 22:03:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:39,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:03:39,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181651059] [2024-10-31 22:03:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:39,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:39,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:39,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:39,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:03:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:39,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:03:39,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:39,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:03:39,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:03:39,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2024-10-31 22:03:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:03:39,905 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:03:39,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:39,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492938466] [2024-10-31 22:03:39,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:03:39,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181651059] [2024-10-31 22:03:39,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181651059] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:39,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:39,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-31 22:03:39,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585642444] [2024-10-31 22:03:39,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:39,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:03:39,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:03:39,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:03:39,914 INFO L87 Difference]: Start difference. First operand 172 states and 182 transitions. Second operand has 12 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:03:43,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:03:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:44,533 INFO L93 Difference]: Finished difference Result 176 states and 185 transitions. [2024-10-31 22:03:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:03:44,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-10-31 22:03:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:44,536 INFO L225 Difference]: With dead ends: 176 [2024-10-31 22:03:44,536 INFO L226 Difference]: Without dead ends: 175 [2024-10-31 22:03:44,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:03:44,541 INFO L432 NwaCegarLoop]: 166 mSDtfsCounter, 187 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:44,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1082 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-10-31 22:03:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-10-31 22:03:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2024-10-31 22:03:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 158 states have internal predecessors, (158), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 22:03:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 184 transitions. [2024-10-31 22:03:44,576 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 184 transitions. Word has length 15 [2024-10-31 22:03:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:44,577 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 184 transitions. [2024-10-31 22:03:44,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:03:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 184 transitions. [2024-10-31 22:03:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:03:44,579 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:44,579 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:44,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:03:44,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:44,780 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-10-31 22:03:44,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash 980417466, now seen corresponding path program 1 times [2024-10-31 22:03:44,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:44,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012608437] [2024-10-31 22:03:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:44,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:03:44,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021650716] [2024-10-31 22:03:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:44,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:44,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:44,845 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:44,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:03:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:45,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 22:03:45,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:45,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:03:45,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:03:45,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:03:45,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2024-10-31 22:03:45,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:03:45,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-10-31 22:03:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:45,498 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:03:45,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:45,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012608437] [2024-10-31 22:03:45,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:03:45,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021650716] [2024-10-31 22:03:45,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021650716] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:45,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:45,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 22:03:45,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413937514] [2024-10-31 22:03:45,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:45,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:03:45,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:45,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:03:45,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:03:45,502 INFO L87 Difference]: Start difference. First operand 175 states and 184 transitions. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:03:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:46,090 INFO L93 Difference]: Finished difference Result 175 states and 184 transitions. [2024-10-31 22:03:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:03:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2024-10-31 22:03:46,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:46,093 INFO L225 Difference]: With dead ends: 175 [2024-10-31 22:03:46,093 INFO L226 Difference]: Without dead ends: 174 [2024-10-31 22:03:46,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:03:46,095 INFO L432 NwaCegarLoop]: 158 mSDtfsCounter, 208 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:46,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 840 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 22:03:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-10-31 22:03:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-10-31 22:03:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 94 states have (on average 1.6702127659574468) internal successors, (157), 157 states have internal predecessors, (157), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 22:03:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 183 transitions. [2024-10-31 22:03:46,132 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 183 transitions. Word has length 16 [2024-10-31 22:03:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:46,133 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 183 transitions. [2024-10-31 22:03:46,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:03:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 183 transitions. [2024-10-31 22:03:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-31 22:03:46,134 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:46,134 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:46,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:03:46,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:46,334 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-10-31 22:03:46,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash 328170556, now seen corresponding path program 1 times [2024-10-31 22:03:46,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:46,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969264578] [2024-10-31 22:03:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:03:46,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695992388] [2024-10-31 22:03:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:46,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:46,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:46,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:46,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:03:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:46,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:03:46,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:46,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-10-31 22:03:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:46,726 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:03:46,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:46,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969264578] [2024-10-31 22:03:46,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:03:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695992388] [2024-10-31 22:03:46,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695992388] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:46,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:46,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:03:46,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932255420] [2024-10-31 22:03:46,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:46,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:03:46,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:46,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:03:46,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:03:46,732 INFO L87 Difference]: Start difference. First operand 174 states and 183 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:03:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:46,922 INFO L93 Difference]: Finished difference Result 174 states and 183 transitions. [2024-10-31 22:03:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:03:46,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-10-31 22:03:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:46,924 INFO L225 Difference]: With dead ends: 174 [2024-10-31 22:03:46,924 INFO L226 Difference]: Without dead ends: 173 [2024-10-31 22:03:46,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:03:46,925 INFO L432 NwaCegarLoop]: 167 mSDtfsCounter, 24 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:46,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 945 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:03:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-10-31 22:03:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2024-10-31 22:03:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 94 states have (on average 1.6595744680851063) internal successors, (156), 156 states have internal predecessors, (156), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 22:03:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 182 transitions. [2024-10-31 22:03:46,950 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 182 transitions. Word has length 17 [2024-10-31 22:03:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:46,950 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 182 transitions. [2024-10-31 22:03:46,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:03:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 182 transitions. [2024-10-31 22:03:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 22:03:46,951 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:46,951 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:46,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:03:47,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:47,153 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-10-31 22:03:47,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1583352828, now seen corresponding path program 1 times [2024-10-31 22:03:47,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:47,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679290503] [2024-10-31 22:03:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:47,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:03:47,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254342455] [2024-10-31 22:03:47,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:47,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:47,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:47,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:47,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:03:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:47,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:03:47,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:47,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:03:47,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:03:47,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2024-10-31 22:03:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:03:47,636 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:03:47,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:47,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679290503] [2024-10-31 22:03:47,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:03:47,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254342455] [2024-10-31 22:03:47,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254342455] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:03:47,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:03:47,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 22:03:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872468268] [2024-10-31 22:03:47,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:03:47,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:03:47,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:03:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:03:47,639 INFO L87 Difference]: Start difference. First operand 173 states and 182 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:03:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:03:48,126 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2024-10-31 22:03:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:03:48,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-10-31 22:03:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:03:48,128 INFO L225 Difference]: With dead ends: 173 [2024-10-31 22:03:48,128 INFO L226 Difference]: Without dead ends: 172 [2024-10-31 22:03:48,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:03:48,130 INFO L432 NwaCegarLoop]: 160 mSDtfsCounter, 158 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:03:48,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 972 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:03:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-10-31 22:03:48,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2024-10-31 22:03:48,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 94 states have (on average 1.648936170212766) internal successors, (155), 155 states have internal predecessors, (155), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-31 22:03:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 181 transitions. [2024-10-31 22:03:48,157 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 181 transitions. Word has length 18 [2024-10-31 22:03:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:03:48,158 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 181 transitions. [2024-10-31 22:03:48,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:03:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 181 transitions. [2024-10-31 22:03:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 22:03:48,159 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:03:48,159 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:03:48,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:03:48,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:48,361 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_45_to_53_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-10-31 22:03:48,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:03:48,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1143096871, now seen corresponding path program 1 times [2024-10-31 22:03:48,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:03:48,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499651086] [2024-10-31 22:03:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:48,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:03:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:03:48,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240374426] [2024-10-31 22:03:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:03:48,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:03:48,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:03:48,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:03:48,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:03:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:03:48,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-31 22:03:48,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:03:48,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:03:48,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 22:03:49,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:03:49,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:03:49,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:03:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:03:49,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:03:49,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:03:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499651086] [2024-10-31 22:03:49,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:03:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240374426] [2024-10-31 22:03:49,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240374426] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:03:49,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:03:49,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-10-31 22:03:49,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977854445] [2024-10-31 22:03:49,671 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-31 22:03:49,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:03:49,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:03:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:03:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-10-31 22:03:49,673 INFO L87 Difference]: Start difference. First operand 172 states and 181 transitions. Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:03:54,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:03:58,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:04:02,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:04:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:04:02,757 INFO L93 Difference]: Finished difference Result 402 states and 421 transitions. [2024-10-31 22:04:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 22:04:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2024-10-31 22:04:02,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:04:02,764 INFO L225 Difference]: With dead ends: 402 [2024-10-31 22:04:02,764 INFO L226 Difference]: Without dead ends: 401 [2024-10-31 22:04:02,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2024-10-31 22:04:02,765 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 356 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 25 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-10-31 22:04:02,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1872 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 516 Invalid, 3 Unknown, 0 Unchecked, 12.8s Time] [2024-10-31 22:04:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-10-31 22:04:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 297. [2024-10-31 22:04:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 203 states have (on average 1.7142857142857142) internal successors, (348), 266 states have internal predecessors, (348), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) [2024-10-31 22:04:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 398 transitions. [2024-10-31 22:04:02,792 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 398 transitions. Word has length 38 [2024-10-31 22:04:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:04:02,792 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 398 transitions. [2024-10-31 22:04:02,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:04:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 398 transitions. [2024-10-31 22:04:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 22:04:02,793 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:04:02,793 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:04:02,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 22:04:03,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:03,000 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_39_to_65_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_39_to_65_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 62 more)] === [2024-10-31 22:04:03,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:04:03,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1149019582, now seen corresponding path program 1 times [2024-10-31 22:04:03,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:04:03,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767562901] [2024-10-31 22:04:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:03,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:04:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:03,555 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:04:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:03,561 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-31 22:04:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:03,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:04:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:03,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:04:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:03,658 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-31 22:04:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:04:03,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:04:03,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767562901] [2024-10-31 22:04:03,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767562901] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:04:03,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953603945] [2024-10-31 22:04:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:04:03,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:04:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:04:03,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:04:03,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23f85eb9-2038-4e2e-9aae-5212ee5562ca/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:04:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:04:04,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:04:04,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:04:04,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:04:04,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 22:04:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:04:04,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:04:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:04:05,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953603945] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:04:05,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:04:05,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2024-10-31 22:04:05,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333668770] [2024-10-31 22:04:05,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:04:05,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 22:04:05,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:04:05,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 22:04:05,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:04:05,211 INFO L87 Difference]: Start difference. First operand 297 states and 398 transitions. Second operand has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 20 states have internal predecessors, (45), 6 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-10-31 22:04:12,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]