./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 527bcce2 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_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b375ae29a973823eea93f22f40d893acb563fa864c4860e04525925a120d938 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:47:57,475 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:47:57,593 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-21 19:47:57,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:47:57,602 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:47:57,667 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:47:57,668 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:47:57,669 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:47:57,670 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:47:57,675 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:47:57,675 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:47:57,676 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:47:57,676 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:47:57,678 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:47:57,679 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:47:57,679 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:47:57,680 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:47:57,680 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:47:57,681 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:47:57,681 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:47:57,682 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:47:57,682 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:47:57,683 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:47:57,684 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:47:57,685 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:47:57,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:47:57,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:47:57,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:47:57,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:47:57,687 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:47:57,688 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:47:57,689 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-21 19:47:57,689 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:47:57,689 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:47:57,689 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:47:57,690 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:47:57,690 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:47:57,690 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:47:57,702 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:47:57,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:47:57,703 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:47:57,703 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:47:57,703 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:47:57,704 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:47:57,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:47:57,705 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:47:57,705 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:47:57,705 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:47:57,705 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:47:57,706 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b375ae29a973823eea93f22f40d893acb563fa864c4860e04525925a120d938 [2023-11-21 19:47:58,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:47:58,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:47:58,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:47:58,099 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:47:58,100 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:47:58,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c [2023-11-21 19:48:01,203 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:48:01,552 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:48:01,553 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c [2023-11-21 19:48:01,563 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/data/97a073ca9/d93cddaeebc34e42869962f490a0ba53/FLAGafd3b7b2a [2023-11-21 19:48:01,585 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/data/97a073ca9/d93cddaeebc34e42869962f490a0ba53 [2023-11-21 19:48:01,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:48:01,594 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:48:01,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:48:01,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:48:01,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:48:01,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:01,606 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44ef2db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01, skipping insertion in model container [2023-11-21 19:48:01,606 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:01,649 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:48:01,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:48:01,877 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:48:01,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:48:01,926 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:48:01,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01 WrapperNode [2023-11-21 19:48:01,927 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:48:01,928 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:48:01,929 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:48:01,929 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:48:01,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:01,947 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:01,994 INFO L138 Inliner]: procedures = 16, calls = 84, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 143 [2023-11-21 19:48:01,995 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:48:01,996 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:48:01,996 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:48:01,996 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:48:02,006 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:02,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:02,010 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:02,010 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:02,019 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:02,022 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:02,025 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:02,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:02,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:48:02,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:48:02,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:48:02,033 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:48:02,034 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (1/1) ... [2023-11-21 19:48:02,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:48:02,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:02,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:48:02,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:48:02,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:48:02,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:48:02,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:48:02,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:48:02,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:48:02,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:48:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:48:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 19:48:02,161 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 19:48:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_35_0 [2023-11-21 19:48:02,161 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_35_0 [2023-11-21 19:48:02,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:48:02,304 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:48:02,307 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:48:03,242 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:48:03,320 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:48:03,320 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:48:03,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:48:03 BoogieIcfgContainer [2023-11-21 19:48:03,322 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:48:03,324 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:48:03,324 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:48:03,327 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:48:03,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:48:01" (1/3) ... [2023-11-21 19:48:03,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65566128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:48:03, skipping insertion in model container [2023-11-21 19:48:03,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:01" (2/3) ... [2023-11-21 19:48:03,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65566128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:48:03, skipping insertion in model container [2023-11-21 19:48:03,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:48:03" (3/3) ... [2023-11-21 19:48:03,330 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps6-ll.c [2023-11-21 19:48:03,349 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:48:03,350 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 102 error locations. [2023-11-21 19:48:03,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:48:03,440 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@5bb8058e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:48:03,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 102 error locations. [2023-11-21 19:48:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 222 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 215 states have internal predecessors, (216), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 19:48:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 19:48:03,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:03,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 19:48:03,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_27_to_35_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:03,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:03,466 INFO L85 PathProgramCache]: Analyzing trace with hash 282779244, now seen corresponding path program 1 times [2023-11-21 19:48:03,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:03,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181315034] [2023-11-21 19:48:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:03,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:04,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:04,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181315034] [2023-11-21 19:48:04,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181315034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:04,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:04,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:48:04,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636543956] [2023-11-21 19:48:04,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:04,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:48:04,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:04,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:48:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:48:04,467 INFO L87 Difference]: Start difference. First operand has 222 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 215 states have internal predecessors, (216), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:05,097 INFO L93 Difference]: Finished difference Result 516 states and 526 transitions. [2023-11-21 19:48:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:48:05,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-21 19:48:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:05,122 INFO L225 Difference]: With dead ends: 516 [2023-11-21 19:48:05,123 INFO L226 Difference]: Without dead ends: 397 [2023-11-21 19:48:05,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:48:05,134 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 327 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:05,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 807 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:48:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-21 19:48:05,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 268. [2023-11-21 19:48:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.8417721518987342) internal successors, (291), 260 states have internal predecessors, (291), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 19:48:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 302 transitions. [2023-11-21 19:48:05,205 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 302 transitions. Word has length 5 [2023-11-21 19:48:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:05,205 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 302 transitions. [2023-11-21 19:48:05,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 302 transitions. [2023-11-21 19:48:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 19:48:05,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:05,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:05,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:48:05,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_27_to_35_0Err12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:05,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:05,208 INFO L85 PathProgramCache]: Analyzing trace with hash 167032, now seen corresponding path program 1 times [2023-11-21 19:48:05,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:05,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544239724] [2023-11-21 19:48:05,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:05,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:05,243 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:05,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843074498] [2023-11-21 19:48:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:05,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:05,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:05,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:05,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:48:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:05,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 19:48:05,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-21 19:48:05,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-11-21 19:48:05,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2023-11-21 19:48:05,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-11-21 19:48:05,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-21 19:48:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-21 19:48:05,685 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-21 19:48:05,686 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-21 19:48:05,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:05,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-21 19:48:05,754 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 [2023-11-21 19:48:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:05,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:05,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:05,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544239724] [2023-11-21 19:48:05,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:05,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843074498] [2023-11-21 19:48:05,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843074498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:05,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:05,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:48:05,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725280774] [2023-11-21 19:48:05,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:05,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:48:05,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:05,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:48:05,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:48:05,770 INFO L87 Difference]: Start difference. First operand 268 states and 302 transitions. Second operand has 6 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:06,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:06,398 INFO L93 Difference]: Finished difference Result 397 states and 401 transitions. [2023-11-21 19:48:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:48:06,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-21 19:48:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:06,402 INFO L225 Difference]: With dead ends: 397 [2023-11-21 19:48:06,403 INFO L226 Difference]: Without dead ends: 396 [2023-11-21 19:48:06,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:48:06,413 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 299 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:06,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 777 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 19:48:06,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-11-21 19:48:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 268. [2023-11-21 19:48:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.8354430379746836) internal successors, (290), 260 states have internal predecessors, (290), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 19:48:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 301 transitions. [2023-11-21 19:48:06,441 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 301 transitions. Word has length 17 [2023-11-21 19:48:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:06,442 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 301 transitions. [2023-11-21 19:48:06,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 301 transitions. [2023-11-21 19:48:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 19:48:06,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:06,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:06,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 19:48:06,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:06,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_27_to_35_0Err13ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:06,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:06,665 INFO L85 PathProgramCache]: Analyzing trace with hash 5178176, now seen corresponding path program 1 times [2023-11-21 19:48:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:06,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542984552] [2023-11-21 19:48:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:06,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:06,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:06,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102975181] [2023-11-21 19:48:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:06,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:06,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:06,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:06,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:48:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:06,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 19:48:06,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:06,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:06,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:06,867 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-11-21 19:48:06,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 114 [2023-11-21 19:48:06,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:06,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2023-11-21 19:48:06,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:06,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:07,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:07,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:07,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2023-11-21 19:48:07,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2023-11-21 19:48:07,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:07,157 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2023-11-21 19:48:07,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 65 [2023-11-21 19:48:07,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:07,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:48:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:07,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:07,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:07,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542984552] [2023-11-21 19:48:07,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:07,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102975181] [2023-11-21 19:48:07,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102975181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:07,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:07,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:48:07,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267209940] [2023-11-21 19:48:07,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:07,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:48:07,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:07,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:48:07,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:48:07,225 INFO L87 Difference]: Start difference. First operand 268 states and 301 transitions. Second operand has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:07,582 INFO L93 Difference]: Finished difference Result 396 states and 400 transitions. [2023-11-21 19:48:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:48:07,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-21 19:48:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:07,586 INFO L225 Difference]: With dead ends: 396 [2023-11-21 19:48:07,586 INFO L226 Difference]: Without dead ends: 395 [2023-11-21 19:48:07,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:48:07,587 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 295 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:07,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 779 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:48:07,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-11-21 19:48:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 268. [2023-11-21 19:48:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.8291139240506329) internal successors, (289), 260 states have internal predecessors, (289), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 19:48:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 300 transitions. [2023-11-21 19:48:07,605 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 300 transitions. Word has length 18 [2023-11-21 19:48:07,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:07,606 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 300 transitions. [2023-11-21 19:48:07,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 300 transitions. [2023-11-21 19:48:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 19:48:07,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:07,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:07,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:07,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:07,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_27_to_35_0Err14ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:07,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:07,829 INFO L85 PathProgramCache]: Analyzing trace with hash 160523642, now seen corresponding path program 1 times [2023-11-21 19:48:07,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:07,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132841324] [2023-11-21 19:48:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:07,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:07,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:07,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722295924] [2023-11-21 19:48:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:07,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:07,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:07,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:07,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:48:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:08,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-21 19:48:08,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:08,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:08,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-11-21 19:48:08,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-21 19:48:08,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:08,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:08,114 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:08,115 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:08,128 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-21 19:48:08,129 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-21 19:48:08,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-21 19:48:08,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-21 19:48:08,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:08,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-21 19:48:08,188 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:08,189 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:08,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:08,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:08,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132841324] [2023-11-21 19:48:08,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:08,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722295924] [2023-11-21 19:48:08,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722295924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:08,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:08,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:48:08,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188628553] [2023-11-21 19:48:08,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:08,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:48:08,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:08,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:48:08,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:48:08,265 INFO L87 Difference]: Start difference. First operand 268 states and 300 transitions. Second operand has 6 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:08,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:08,625 INFO L93 Difference]: Finished difference Result 395 states and 399 transitions. [2023-11-21 19:48:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:48:08,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-21 19:48:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:08,628 INFO L225 Difference]: With dead ends: 395 [2023-11-21 19:48:08,628 INFO L226 Difference]: Without dead ends: 387 [2023-11-21 19:48:08,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:48:08,630 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 270 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:08,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 795 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:48:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-21 19:48:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 268. [2023-11-21 19:48:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.7784810126582278) internal successors, (281), 260 states have internal predecessors, (281), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 19:48:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 292 transitions. [2023-11-21 19:48:08,643 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 292 transitions. Word has length 19 [2023-11-21 19:48:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:08,644 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 292 transitions. [2023-11-21 19:48:08,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 292 transitions. [2023-11-21 19:48:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 19:48:08,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:08,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:08,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:08,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:08,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_27_to_35_0Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:08,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:08,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1877121410, now seen corresponding path program 1 times [2023-11-21 19:48:08,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:08,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723032820] [2023-11-21 19:48:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:08,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:08,887 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:08,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012249018] [2023-11-21 19:48:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:08,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:08,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:08,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:08,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:48:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:08,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-21 19:48:08,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:09,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:09,035 INFO L349 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-11-21 19:48:09,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-11-21 19:48:09,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 16 [2023-11-21 19:48:09,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:09,082 INFO L349 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-11-21 19:48:09,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-11-21 19:48:09,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 44 treesize of output 42 [2023-11-21 19:48:09,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:09,138 INFO L349 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-11-21 19:48:09,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-11-21 19:48:09,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:09,215 INFO L349 Elim1Store]: treesize reduction 109, result has 12.1 percent of original size [2023-11-21 19:48:09,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 22 [2023-11-21 19:48:09,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 44 treesize of output 42 [2023-11-21 19:48:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:10,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:10,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:10,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723032820] [2023-11-21 19:48:10,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012249018] [2023-11-21 19:48:10,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012249018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:10,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:10,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:48:10,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433275503] [2023-11-21 19:48:10,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:10,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:48:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:10,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:48:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:48:10,639 INFO L87 Difference]: Start difference. First operand 268 states and 292 transitions. Second operand has 7 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:11,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:11,923 INFO L93 Difference]: Finished difference Result 387 states and 391 transitions. [2023-11-21 19:48:11,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:48:11,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-21 19:48:11,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:11,926 INFO L225 Difference]: With dead ends: 387 [2023-11-21 19:48:11,926 INFO L226 Difference]: Without dead ends: 386 [2023-11-21 19:48:11,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-21 19:48:11,928 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 262 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:11,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 909 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-21 19:48:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-11-21 19:48:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 268. [2023-11-21 19:48:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.7721518987341771) internal successors, (280), 260 states have internal predecessors, (280), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 19:48:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 291 transitions. [2023-11-21 19:48:11,964 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 291 transitions. Word has length 27 [2023-11-21 19:48:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:11,964 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 291 transitions. [2023-11-21 19:48:11,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 291 transitions. [2023-11-21 19:48:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 19:48:11,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:11,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:11,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:12,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:12,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_27_to_35_0Err23ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:12,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:12,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1938778230, now seen corresponding path program 1 times [2023-11-21 19:48:12,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:12,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290661612] [2023-11-21 19:48:12,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:12,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:12,214 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:12,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352566539] [2023-11-21 19:48:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:12,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:12,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:12,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:12,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 19:48:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:12,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-21 19:48:12,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:12,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:13,993 INFO L349 Elim1Store]: treesize reduction 509, result has 32.8 percent of original size [2023-11-21 19:48:13,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 760 treesize of output 1090 [2023-11-21 19:48:14,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 24 [2023-11-21 19:48:14,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2023-11-21 19:48:14,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2023-11-21 19:48:15,420 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:15,431 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:15,535 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:15,627 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:15,643 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:15,647 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:15,652 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:15,859 INFO L224 Elim1Store]: Index analysis took 599 ms [2023-11-21 19:48:15,982 INFO L349 Elim1Store]: treesize reduction 144, result has 10.6 percent of original size [2023-11-21 19:48:15,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 26 case distinctions, treesize of input 246 treesize of output 461 [2023-11-21 19:48:16,293 WARN L200 Elim1Store]: Array PQE input equivalent to false [2023-11-21 19:48:16,609 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,621 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,627 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,684 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,694 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,756 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,790 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,800 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,803 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,804 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,805 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,808 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,850 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:16,864 INFO L224 Elim1Store]: Index analysis took 268 ms [2023-11-21 19:48:16,908 INFO L349 Elim1Store]: treesize reduction 73, result has 9.9 percent of original size [2023-11-21 19:48:16,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 13 case distinctions, treesize of input 237 treesize of output 446 [2023-11-21 19:48:17,264 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:17,406 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:17,435 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:17,578 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:17,664 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:17,760 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:17,792 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:17,793 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:17,797 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:17,798 INFO L224 Elim1Store]: Index analysis took 551 ms [2023-11-21 19:48:17,863 INFO L349 Elim1Store]: treesize reduction 141, result has 5.4 percent of original size [2023-11-21 19:48:17,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 24 case distinctions, treesize of input 237 treesize of output 446 [2023-11-21 19:48:18,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 49 treesize of output 44 [2023-11-21 19:48:19,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 49 treesize of output 44 [2023-11-21 19:48:20,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 49 treesize of output 44 [2023-11-21 19:48:22,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1609 treesize of output 1603 [2023-11-21 19:48:24,142 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:24,155 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:24,253 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:24,393 INFO L224 Elim1Store]: Index analysis took 277 ms [2023-11-21 19:48:24,574 INFO L349 Elim1Store]: treesize reduction 292, result has 7.9 percent of original size [2023-11-21 19:48:24,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 29 case distinctions, treesize of input 572 treesize of output 628 [2023-11-21 19:48:25,509 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,513 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,514 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,525 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,526 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,536 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,542 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,545 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,552 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,560 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,561 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 161 [2023-11-21 19:48:25,806 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,809 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,816 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,817 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,819 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,830 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,832 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,837 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,840 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,841 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,847 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,847 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:25,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 152 [2023-11-21 19:48:25,962 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:26,015 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:26,029 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:26,070 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:26,086 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:26,089 INFO L224 Elim1Store]: Index analysis took 131 ms [2023-11-21 19:48:26,172 INFO L349 Elim1Store]: treesize reduction 96, result has 15.0 percent of original size [2023-11-21 19:48:26,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 18 case distinctions, treesize of input 484 treesize of output 534 [2023-11-21 19:48:26,928 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:26,936 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:26,940 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:26,962 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:26,986 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,018 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,022 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,024 INFO L224 Elim1Store]: Index analysis took 105 ms [2023-11-21 19:48:27,061 INFO L349 Elim1Store]: treesize reduction 105, result has 7.1 percent of original size [2023-11-21 19:48:27,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 18 case distinctions, treesize of input 307 treesize of output 353 [2023-11-21 19:48:27,521 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:27,537 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,573 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,660 INFO L349 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2023-11-21 19:48:27,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 14 case distinctions, treesize of input 300 treesize of output 308 [2023-11-21 19:48:27,870 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,873 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,898 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:27,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:27,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:27,905 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,906 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:27,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2023-11-21 19:48:28,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,269 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,270 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,281 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,283 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,285 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,287 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,289 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,292 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,297 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,301 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 93 [2023-11-21 19:48:28,393 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,393 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,394 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,395 WARN L200 Elim1Store]: Array PQE input equivalent to false [2023-11-21 19:48:28,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,545 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,561 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,568 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,569 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,572 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,576 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,579 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,583 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,586 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2023-11-21 19:48:28,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,744 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,764 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,766 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,769 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,771 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,773 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:28,777 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,780 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:28,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2023-11-21 19:48:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:29,126 INFO L224 Elim1Store]: Index analysis took 133 ms [2023-11-21 19:48:29,279 INFO L349 Elim1Store]: treesize reduction 231, result has 6.9 percent of original size [2023-11-21 19:48:29,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 23 case distinctions, treesize of input 7048 treesize of output 6400 [2023-11-21 19:48:34,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:34,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 145 [2023-11-21 19:48:34,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:34,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2023-11-21 19:48:34,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:34,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 29 [2023-11-21 19:48:34,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:34,993 INFO L349 Elim1Store]: treesize reduction 97, result has 27.1 percent of original size [2023-11-21 19:48:34,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 445 treesize of output 450 [2023-11-21 19:48:35,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:35,729 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:35,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 19 [2023-11-21 19:48:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:35,754 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:35,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 19 [2023-11-21 19:48:35,808 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:35,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 19 [2023-11-21 19:48:35,892 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:35,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:35,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:35,900 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:35,907 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-21 19:48:35,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 24 [2023-11-21 19:48:35,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:35,950 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:35,959 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-21 19:48:35,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 24 [2023-11-21 19:48:36,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:36,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-21 19:48:36,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-21 19:48:36,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:36,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-21 19:48:36,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-21 19:48:36,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:36,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2023-11-21 19:48:36,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:36,432 INFO L349 Elim1Store]: treesize reduction 1172, result has 0.1 percent of original size [2023-11-21 19:48:36,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 46 case distinctions, treesize of input 455 treesize of output 547 [2023-11-21 19:48:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:37,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:37,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290661612] [2023-11-21 19:48:37,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352566539] [2023-11-21 19:48:37,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352566539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:37,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:37,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-21 19:48:37,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872710565] [2023-11-21 19:48:37,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:37,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 19:48:37,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:37,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 19:48:37,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-21 19:48:37,099 INFO L87 Difference]: Start difference. First operand 268 states and 291 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:38,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:38,087 INFO L93 Difference]: Finished difference Result 386 states and 390 transitions. [2023-11-21 19:48:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 19:48:38,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-21 19:48:38,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:38,090 INFO L225 Difference]: With dead ends: 386 [2023-11-21 19:48:38,090 INFO L226 Difference]: Without dead ends: 385 [2023-11-21 19:48:38,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2023-11-21 19:48:38,092 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 329 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:38,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1201 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 19:48:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-21 19:48:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 268. [2023-11-21 19:48:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.7658227848101267) internal successors, (279), 260 states have internal predecessors, (279), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 19:48:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2023-11-21 19:48:38,123 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 28 [2023-11-21 19:48:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:38,123 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2023-11-21 19:48:38,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2023-11-21 19:48:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 19:48:38,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:38,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:38,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:38,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 19:48:38,340 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_27_to_35_0Err24ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:38,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:38,341 INFO L85 PathProgramCache]: Analyzing trace with hash 27417220, now seen corresponding path program 1 times [2023-11-21 19:48:38,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:38,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810548335] [2023-11-21 19:48:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:38,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:38,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:38,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505867552] [2023-11-21 19:48:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:38,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:38,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:38,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:38,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 19:48:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:38,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 19:48:38,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:38,506 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 17 treesize of output 9 [2023-11-21 19:48:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:38,513 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:38,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:38,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810548335] [2023-11-21 19:48:38,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:38,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505867552] [2023-11-21 19:48:38,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505867552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:38,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:38,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:48:38,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329785826] [2023-11-21 19:48:38,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:38,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:48:38,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:38,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:48:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:48:38,518 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:38,987 INFO L93 Difference]: Finished difference Result 270 states and 292 transitions. [2023-11-21 19:48:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:48:38,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-21 19:48:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:38,991 INFO L225 Difference]: With dead ends: 270 [2023-11-21 19:48:38,991 INFO L226 Difference]: Without dead ends: 269 [2023-11-21 19:48:38,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:48:38,992 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 148 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:38,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 553 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:48:38,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-21 19:48:39,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2023-11-21 19:48:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 159 states have (on average 1.748427672955975) internal successors, (278), 260 states have internal predecessors, (278), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-21 19:48:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 290 transitions. [2023-11-21 19:48:39,006 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 290 transitions. Word has length 29 [2023-11-21 19:48:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:39,007 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 290 transitions. [2023-11-21 19:48:39,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 290 transitions. [2023-11-21 19:48:39,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 19:48:39,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:39,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:39,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:39,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:39,224 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_27_to_35_0Err25ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:39,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:39,225 INFO L85 PathProgramCache]: Analyzing trace with hash 849934028, now seen corresponding path program 1 times [2023-11-21 19:48:39,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:39,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237583870] [2023-11-21 19:48:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:39,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:39,239 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:39,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147776588] [2023-11-21 19:48:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:39,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:39,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:39,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:39,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 19:48:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:39,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 19:48:39,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:39,382 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 [2023-11-21 19:48:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:39,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:39,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:39,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237583870] [2023-11-21 19:48:39,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:39,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147776588] [2023-11-21 19:48:39,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147776588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:39,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:39,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:48:39,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793760158] [2023-11-21 19:48:39,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:39,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:48:39,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:39,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:48:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:48:39,396 INFO L87 Difference]: Start difference. First operand 269 states and 290 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:39,761 INFO L93 Difference]: Finished difference Result 269 states and 290 transitions. [2023-11-21 19:48:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:48:39,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-21 19:48:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:39,763 INFO L225 Difference]: With dead ends: 269 [2023-11-21 19:48:39,763 INFO L226 Difference]: Without dead ends: 268 [2023-11-21 19:48:39,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:48:39,764 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 142 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:39,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 553 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:48:39,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-11-21 19:48:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2023-11-21 19:48:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.7358490566037736) internal successors, (276), 259 states have internal predecessors, (276), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-21 19:48:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 288 transitions. [2023-11-21 19:48:39,777 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 288 transitions. Word has length 30 [2023-11-21 19:48:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:39,778 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 288 transitions. [2023-11-21 19:48:39,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 288 transitions. [2023-11-21 19:48:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 19:48:39,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:39,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:39,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:39,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:39,999 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_27_to_35_0Err26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:40,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash 578151302, now seen corresponding path program 1 times [2023-11-21 19:48:40,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:40,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459523134] [2023-11-21 19:48:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:40,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:40,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:40,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882949733] [2023-11-21 19:48:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:40,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:40,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:40,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:40,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 19:48:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:40,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-21 19:48:40,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:40,169 INFO L349 Elim1Store]: treesize reduction 40, result has 35.5 percent of original size [2023-11-21 19:48:40,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 45 [2023-11-21 19:48:40,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:40,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:40,219 INFO L349 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2023-11-21 19:48:40,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 62 [2023-11-21 19:48:40,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 19:48:40,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1397 treesize of output 1371 [2023-11-21 19:48:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:40,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:40,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:40,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459523134] [2023-11-21 19:48:40,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:40,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882949733] [2023-11-21 19:48:40,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882949733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:40,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:40,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:48:40,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54191660] [2023-11-21 19:48:40,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:40,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:48:40,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:48:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:48:40,462 INFO L87 Difference]: Start difference. First operand 268 states and 288 transitions. Second operand has 6 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:40,792 INFO L93 Difference]: Finished difference Result 383 states and 387 transitions. [2023-11-21 19:48:40,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:48:40,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-21 19:48:40,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:40,795 INFO L225 Difference]: With dead ends: 383 [2023-11-21 19:48:40,795 INFO L226 Difference]: Without dead ends: 377 [2023-11-21 19:48:40,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:48:40,796 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 216 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:40,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 798 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:48:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-21 19:48:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 268. [2023-11-21 19:48:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.6981132075471699) internal successors, (270), 259 states have internal predecessors, (270), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-21 19:48:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 282 transitions. [2023-11-21 19:48:40,811 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 282 transitions. Word has length 31 [2023-11-21 19:48:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:40,812 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 282 transitions. [2023-11-21 19:48:40,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 282 transitions. [2023-11-21 19:48:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-21 19:48:40,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:40,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:40,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:41,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:41,034 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_27_to_35_0Err32ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:41,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:41,035 INFO L85 PathProgramCache]: Analyzing trace with hash 62074508, now seen corresponding path program 1 times [2023-11-21 19:48:41,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:41,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559041023] [2023-11-21 19:48:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:41,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:41,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:41,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783086172] [2023-11-21 19:48:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:41,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:41,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:41,052 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:41,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 19:48:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:41,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-21 19:48:41,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:41,183 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-21 19:48:41,184 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 27 [2023-11-21 19:48:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-21 19:48:41,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-11-21 19:48:41,202 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-21 19:48:41,202 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-21 19:48:41,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-21 19:48:41,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-21 19:48:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:41,237 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:41,238 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:41,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-21 19:48:41,285 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:41,286 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:41,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-21 19:48:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 17 [2023-11-21 19:48:41,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:48:41,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:41,324 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-21 19:48:41,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-21 19:48:41,337 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:41,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:41,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:41,350 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:41,351 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:41,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:41,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:41,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559041023] [2023-11-21 19:48:41,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:41,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783086172] [2023-11-21 19:48:41,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783086172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:41,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:41,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:48:41,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772639373] [2023-11-21 19:48:41,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:41,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:48:41,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:41,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:48:41,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:48:41,518 INFO L87 Difference]: Start difference. First operand 268 states and 282 transitions. Second operand has 8 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:41,851 INFO L93 Difference]: Finished difference Result 377 states and 381 transitions. [2023-11-21 19:48:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:48:41,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-21 19:48:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:41,854 INFO L225 Difference]: With dead ends: 377 [2023-11-21 19:48:41,854 INFO L226 Difference]: Without dead ends: 375 [2023-11-21 19:48:41,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:48:41,856 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 219 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:41,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 821 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:48:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-21 19:48:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 268. [2023-11-21 19:48:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.6855345911949686) internal successors, (268), 259 states have internal predecessors, (268), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-21 19:48:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 280 transitions. [2023-11-21 19:48:41,868 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 280 transitions. Word has length 37 [2023-11-21 19:48:41,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:41,869 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 280 transitions. [2023-11-21 19:48:41,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:41,869 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 280 transitions. [2023-11-21 19:48:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-21 19:48:41,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:41,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:41,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:42,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 19:48:42,076 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_27_to_35_0Err34ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:42,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash -475932786, now seen corresponding path program 1 times [2023-11-21 19:48:42,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:42,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540309857] [2023-11-21 19:48:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:42,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:42,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:42,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153909366] [2023-11-21 19:48:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:42,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:42,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:42,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:42,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 19:48:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:42,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-21 19:48:42,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:42,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:42,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:42,279 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-11-21 19:48:42,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 114 [2023-11-21 19:48:42,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:42,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2023-11-21 19:48:42,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:42,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:42,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:42,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:42,495 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-21 19:48:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:42,557 INFO L349 Elim1Store]: treesize reduction 56, result has 30.9 percent of original size [2023-11-21 19:48:42,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 89 [2023-11-21 19:48:42,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:42,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 24 [2023-11-21 19:48:42,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:42,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:48:42,651 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-21 19:48:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:43,834 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:43,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:43,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540309857] [2023-11-21 19:48:43,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:43,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153909366] [2023-11-21 19:48:43,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153909366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:43,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:43,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:48:43,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071988075] [2023-11-21 19:48:43,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:43,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:48:43,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:43,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:48:43,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:48:43,837 INFO L87 Difference]: Start difference. First operand 268 states and 280 transitions. Second operand has 6 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:44,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:44,437 INFO L93 Difference]: Finished difference Result 276 states and 280 transitions. [2023-11-21 19:48:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:48:44,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-21 19:48:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:44,440 INFO L225 Difference]: With dead ends: 276 [2023-11-21 19:48:44,440 INFO L226 Difference]: Without dead ends: 274 [2023-11-21 19:48:44,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2023-11-21 19:48:44,441 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 79 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:44,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 872 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 2 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:48:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-11-21 19:48:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 268. [2023-11-21 19:48:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.6729559748427674) internal successors, (266), 259 states have internal predecessors, (266), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-21 19:48:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 278 transitions. [2023-11-21 19:48:44,455 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 278 transitions. Word has length 39 [2023-11-21 19:48:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:44,455 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 278 transitions. [2023-11-21 19:48:44,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 278 transitions. [2023-11-21 19:48:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-21 19:48:44,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:44,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:44,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 19:48:44,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 19:48:44,673 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_27_to_35_0Err36ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:44,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:44,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2104866672, now seen corresponding path program 1 times [2023-11-21 19:48:44,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:44,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74435463] [2023-11-21 19:48:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:44,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:44,693 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:44,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810622243] [2023-11-21 19:48:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:44,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:44,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:44,695 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:44,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 19:48:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:44,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 19:48:44,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:44,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-21 19:48:44,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-11-21 19:48:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-11-21 19:48:44,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-21 19:48:44,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:44,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-21 19:48:44,883 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:44,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:44,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:44,897 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:44,898 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:44,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:44,915 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:44,916 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:44,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-21 19:48:44,930 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-21 19:48:44,939 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-21 19:48:44,940 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 19:48:44,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 19:48:44,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2023-11-21 19:48:44,959 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-21 19:48:44,959 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-21 19:48:44,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:44,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-21 19:48:44,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-21 19:48:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:45,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:45,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:45,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74435463] [2023-11-21 19:48:45,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:45,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810622243] [2023-11-21 19:48:45,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810622243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:45,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:45,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:48:45,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748398969] [2023-11-21 19:48:45,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:45,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:48:45,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:45,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:48:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:48:45,239 INFO L87 Difference]: Start difference. First operand 268 states and 278 transitions. Second operand has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:47,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-21 19:48:47,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:47,821 INFO L93 Difference]: Finished difference Result 373 states and 377 transitions. [2023-11-21 19:48:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:48:47,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-21 19:48:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:47,824 INFO L225 Difference]: With dead ends: 373 [2023-11-21 19:48:47,825 INFO L226 Difference]: Without dead ends: 372 [2023-11-21 19:48:47,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:48:47,826 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 195 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:47,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 785 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 376 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-11-21 19:48:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-21 19:48:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 268. [2023-11-21 19:48:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.6666666666666667) internal successors, (265), 259 states have internal predecessors, (265), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-21 19:48:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 277 transitions. [2023-11-21 19:48:47,840 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 277 transitions. Word has length 41 [2023-11-21 19:48:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:47,841 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 277 transitions. [2023-11-21 19:48:47,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 277 transitions. [2023-11-21 19:48:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-21 19:48:47,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:47,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:47,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-21 19:48:48,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 19:48:48,056 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting func_to_recursive_line_27_to_35_0Err37ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-21 19:48:48,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:48,057 INFO L85 PathProgramCache]: Analyzing trace with hash -826357160, now seen corresponding path program 1 times [2023-11-21 19:48:48,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:48,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117084271] [2023-11-21 19:48:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:48,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:48,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:48:48,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623824528] [2023-11-21 19:48:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:48,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:48,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:48,072 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:48,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 19:48:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:48,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-21 19:48:48,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:48,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:48,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:48,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:48,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:48,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-11-21 19:48:48,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:48,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-21 19:48:48,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-21 19:48:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:48,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:48,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-21 19:48:48,253 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:48,254 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:48,263 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-21 19:48:48,264 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-21 19:48:48,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:48,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-21 19:48:48,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-21 19:48:48,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:48:48,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-21 19:48:48,315 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:48,315 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:48,316 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:48:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:48:48,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:48:48,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:48,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117084271] [2023-11-21 19:48:48,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:48:48,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623824528] [2023-11-21 19:48:48,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623824528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:48,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:48,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:48:48,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235456115] [2023-11-21 19:48:48,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:48,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:48:48,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:48:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:48:48,575 INFO L87 Difference]: Start difference. First operand 268 states and 277 transitions. Second operand has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:49,061 INFO L93 Difference]: Finished difference Result 372 states and 376 transitions. [2023-11-21 19:48:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:48:49,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-21 19:48:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:49,064 INFO L225 Difference]: With dead ends: 372 [2023-11-21 19:48:49,065 INFO L226 Difference]: Without dead ends: 371 [2023-11-21 19:48:49,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:48:49,066 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 191 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:49,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 785 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:48:49,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-21 19:48:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 268. [2023-11-21 19:48:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.6603773584905661) internal successors, (264), 259 states have internal predecessors, (264), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-21 19:48:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 276 transitions. [2023-11-21 19:48:49,081 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 276 transitions. Word has length 42 [2023-11-21 19:48:49,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:49,081 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 276 transitions. [2023-11-21 19:48:49,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:48:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 276 transitions. [2023-11-21 19:48:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 19:48:49,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:49,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:49,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a85d0840-1ce2-41a1-ab27-995bcf29b5f4/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0