./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:55:48,272 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:55:48,333 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:55:48,338 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:55:48,339 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:55:48,363 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:55:48,364 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:55:48,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:55:48,365 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:55:48,365 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:55:48,366 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:55:48,366 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:55:48,367 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:55:48,367 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:55:48,368 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:55:48,369 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:55:48,369 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:55:48,370 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:55:48,370 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:55:48,371 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:55:48,371 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:55:48,372 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:55:48,373 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:55:48,373 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:55:48,374 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:55:48,374 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:55:48,375 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:55:48,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:55:48,375 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:55:48,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:55:48,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:55:48,376 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:55:48,377 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:55:48,377 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:55:48,377 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:55:48,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:55:48,378 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:55:48,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:55:48,378 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:55:48,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:55:48,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:55:48,379 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:55:48,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:55:48,379 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:55:48,379 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:55:48,379 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:55:48,380 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:55:48,380 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_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2023-12-02 12:55:48,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:55:48,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:55:48,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:55:48,631 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:55:48,631 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:55:48,633 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-patterns/array4_pattern.c [2023-12-02 12:55:51,327 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:55:51,514 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:55:51,514 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/sv-benchmarks/c/array-patterns/array4_pattern.c [2023-12-02 12:55:51,521 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/data/b1b08a387/a3c44813b1874ec6ab8611e157159cd0/FLAG1edc53a35 [2023-12-02 12:55:51,533 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/data/b1b08a387/a3c44813b1874ec6ab8611e157159cd0 [2023-12-02 12:55:51,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:55:51,535 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:55:51,537 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:55:51,537 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:55:51,542 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:55:51,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54eb81db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51, skipping insertion in model container [2023-12-02 12:55:51,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,562 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:55:51,683 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2023-12-02 12:55:51,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:55:51,711 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:55:51,721 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2023-12-02 12:55:51,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:55:51,745 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:55:51,745 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51 WrapperNode [2023-12-02 12:55:51,745 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:55:51,746 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:55:51,746 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:55:51,746 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:55:51,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,776 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2023-12-02 12:55:51,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:55:51,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:55:51,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:55:51,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:55:51,784 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,787 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,787 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,793 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,797 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,798 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,800 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,802 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:55:51,803 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:55:51,803 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:55:51,803 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:55:51,804 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (1/1) ... [2023-12-02 12:55:51,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:55:51,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:55:51,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:55:51,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:55:51,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:55:51,865 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 12:55:51,865 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 12:55:51,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:55:51,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 12:55:51,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 12:55:51,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:55:51,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:55:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 12:55:51,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:55:51,947 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:55:51,950 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:55:52,110 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:55:52,160 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:55:52,160 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 12:55:52,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:55:52 BoogieIcfgContainer [2023-12-02 12:55:52,162 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:55:52,165 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:55:52,165 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:55:52,169 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:55:52,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:55:51" (1/3) ... [2023-12-02 12:55:52,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cf594b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:55:52, skipping insertion in model container [2023-12-02 12:55:52,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:55:51" (2/3) ... [2023-12-02 12:55:52,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18cf594b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:55:52, skipping insertion in model container [2023-12-02 12:55:52,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:55:52" (3/3) ... [2023-12-02 12:55:52,172 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2023-12-02 12:55:52,191 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:55:52,191 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:55:52,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:55:52,246 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;@72ec121f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:55:52,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:55:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:55:52,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 12:55:52,257 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:55:52,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:55:52,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:55:52,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:55:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash 677169670, now seen corresponding path program 1 times [2023-12-02 12:55:52,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:55:52,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865496056] [2023-12-02 12:55:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:55:52,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:55:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:55:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:55:52,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:55:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865496056] [2023-12-02 12:55:52,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865496056] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:55:52,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:55:52,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:55:52,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248080084] [2023-12-02 12:55:52,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:55:52,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 12:55:52,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:55:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 12:55:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 12:55:52,475 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:55:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:55:52,512 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2023-12-02 12:55:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 12:55:52,515 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-12-02 12:55:52,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:55:52,521 INFO L225 Difference]: With dead ends: 29 [2023-12-02 12:55:52,522 INFO L226 Difference]: Without dead ends: 20 [2023-12-02 12:55:52,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 12:55:52,528 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:55:52,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:55:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-02 12:55:52,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-02 12:55:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:55:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-12-02 12:55:52,566 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2023-12-02 12:55:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:55:52,567 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-12-02 12:55:52,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:55:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-12-02 12:55:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:55:52,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:55:52,570 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:55:52,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:55:52,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:55:52,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:55:52,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1127734434, now seen corresponding path program 1 times [2023-12-02 12:55:52,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:55:52,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804663489] [2023-12-02 12:55:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:55:52,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:55:52,611 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:55:52,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358240284] [2023-12-02 12:55:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:55:52,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:55:52,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:55:52,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:55:52,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:55:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:55:52,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:55:52,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:55:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:55:52,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:55:52,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:55:52,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804663489] [2023-12-02 12:55:52,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:55:52,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358240284] [2023-12-02 12:55:52,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358240284] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:55:52,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:55:52,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:55:52,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099324262] [2023-12-02 12:55:52,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:55:52,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:55:52,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:55:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:55:52,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:55:52,793 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:55:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:55:52,828 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-12-02 12:55:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:55:52,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2023-12-02 12:55:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:55:52,830 INFO L225 Difference]: With dead ends: 24 [2023-12-02 12:55:52,830 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 12:55:52,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:55:52,832 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:55:52,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:55:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 12:55:52,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-02 12:55:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:55:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-12-02 12:55:52,840 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 27 [2023-12-02 12:55:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:55:52,841 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-12-02 12:55:52,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:55:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-12-02 12:55:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 12:55:52,842 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:55:52,843 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:55:52,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:55:53,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:55:53,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:55:53,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:55:53,045 INFO L85 PathProgramCache]: Analyzing trace with hash -600344287, now seen corresponding path program 1 times [2023-12-02 12:55:53,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:55:53,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533814767] [2023-12-02 12:55:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:55:53,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:55:53,073 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:55:53,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588305742] [2023-12-02 12:55:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:55:53,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:55:53,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:55:53,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:55:53,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:55:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:55:53,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:55:53,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:55:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:55:53,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:55:53,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:55:53,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533814767] [2023-12-02 12:55:53,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:55:53,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588305742] [2023-12-02 12:55:53,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588305742] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:55:53,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:55:53,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:55:53,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163931902] [2023-12-02 12:55:53,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:55:53,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:55:53,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:55:53,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:55:53,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:55:53,229 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:55:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:55:53,296 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-12-02 12:55:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:55:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2023-12-02 12:55:53,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:55:53,298 INFO L225 Difference]: With dead ends: 39 [2023-12-02 12:55:53,298 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 12:55:53,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:55:53,300 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:55:53,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 41 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:55:53,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 12:55:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-02 12:55:53,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:55:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-12-02 12:55:53,306 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2023-12-02 12:55:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:55:53,307 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-12-02 12:55:53,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:55:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-12-02 12:55:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 12:55:53,308 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:55:53,308 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:55:53,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:55:53,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:55:53,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:55:53,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:55:53,513 INFO L85 PathProgramCache]: Analyzing trace with hash -964196739, now seen corresponding path program 1 times [2023-12-02 12:55:53,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:55:53,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256781541] [2023-12-02 12:55:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:55:53,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:55:53,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:55:53,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119341998] [2023-12-02 12:55:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:55:53,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:55:53,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:55:53,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:55:53,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:55:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:55:53,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 12:55:53,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:55:53,709 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 [2023-12-02 12:55:53,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:55:53,764 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 14 treesize of output 14 [2023-12-02 12:55:53,769 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 [2023-12-02 12:55:54,457 INFO L349 Elim1Store]: treesize reduction 42, result has 30.0 percent of original size [2023-12-02 12:55:54,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 41 [2023-12-02 12:55:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:55:54,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:10,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:10,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256781541] [2023-12-02 12:56:10,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:56:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119341998] [2023-12-02 12:56:10,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119341998] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984552966] [2023-12-02 12:56:10,852 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:56:10,852 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:10,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:10,858 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:10,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:12,100 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:56:12,109 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:14,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:56:14,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:56:14,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:56:14,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-02 12:56:14,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415624798] [2023-12-02 12:56:14,302 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:14,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 12:56:14,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:14,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 12:56:14,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1203, Unknown=7, NotChecked=0, Total=1406 [2023-12-02 12:56:14,304 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 12:56:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:14,836 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2023-12-02 12:56:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 12:56:14,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2023-12-02 12:56:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:14,837 INFO L225 Difference]: With dead ends: 60 [2023-12-02 12:56:14,837 INFO L226 Difference]: Without dead ends: 57 [2023-12-02 12:56:14,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=298, Invalid=1857, Unknown=7, NotChecked=0, Total=2162 [2023-12-02 12:56:14,839 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 59 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:14,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 77 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:56:14,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-02 12:56:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2023-12-02 12:56:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 12:56:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-12-02 12:56:14,851 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 29 [2023-12-02 12:56:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:14,851 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-12-02 12:56:14,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 12:56:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-12-02 12:56:14,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 12:56:14,852 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:14,852 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:14,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:56:15,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:15,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:15,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash 641279137, now seen corresponding path program 2 times [2023-12-02 12:56:15,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:15,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318245147] [2023-12-02 12:56:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:15,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:15,079 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:56:15,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799859293] [2023-12-02 12:56:15,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:56:15,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:15,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:15,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:15,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:56:15,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 12:56:15,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:15,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:56:15,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:56:15,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:56:15,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:15,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318245147] [2023-12-02 12:56:15,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:56:15,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799859293] [2023-12-02 12:56:15,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799859293] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:15,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [698710018] [2023-12-02 12:56:15,301 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:56:15,301 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:15,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:15,302 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:15,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:16,033 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:56:16,038 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:17,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '920#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:56:17,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:56:17,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:56:17,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-02 12:56:17,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134470964] [2023-12-02 12:56:17,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:17,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:56:17,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:17,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:56:17,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2023-12-02 12:56:17,245 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:17,415 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2023-12-02 12:56:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:56:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2023-12-02 12:56:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:17,417 INFO L225 Difference]: With dead ends: 68 [2023-12-02 12:56:17,417 INFO L226 Difference]: Without dead ends: 65 [2023-12-02 12:56:17,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2023-12-02 12:56:17,418 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:17,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 78 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:56:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-02 12:56:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2023-12-02 12:56:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-02 12:56:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2023-12-02 12:56:17,429 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 30 [2023-12-02 12:56:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:17,429 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2023-12-02 12:56:17,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2023-12-02 12:56:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 12:56:17,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:17,430 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:17,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 12:56:17,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:17,631 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:17,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash 174356962, now seen corresponding path program 3 times [2023-12-02 12:56:17,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:17,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490917612] [2023-12-02 12:56:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:17,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:17,653 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:56:17,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430405716] [2023-12-02 12:56:17,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:56:17,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:17,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:17,655 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:17,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:56:17,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:56:17,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:17,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:56:17,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:56:17,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:56:17,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:17,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490917612] [2023-12-02 12:56:17,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:56:17,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430405716] [2023-12-02 12:56:17,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430405716] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:17,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [483207433] [2023-12-02 12:56:17,833 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:56:17,833 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:17,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:17,833 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:17,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:18,670 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:56:18,677 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:20,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1305#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:56:20,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:56:20,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:56:20,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-02 12:56:20,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006164846] [2023-12-02 12:56:20,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:20,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:56:20,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:20,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:56:20,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-12-02 12:56:20,003 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:20,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:20,227 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2023-12-02 12:56:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:56:20,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2023-12-02 12:56:20,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:20,229 INFO L225 Difference]: With dead ends: 69 [2023-12-02 12:56:20,229 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 12:56:20,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2023-12-02 12:56:20,230 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:20,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 68 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:56:20,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 12:56:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2023-12-02 12:56:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-02 12:56:20,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-12-02 12:56:20,244 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 30 [2023-12-02 12:56:20,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:20,244 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-12-02 12:56:20,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:20,245 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-12-02 12:56:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 12:56:20,246 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:20,246 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:20,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 12:56:20,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:20,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:20,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:20,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1595498434, now seen corresponding path program 4 times [2023-12-02 12:56:20,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:20,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445917704] [2023-12-02 12:56:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:20,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:20,463 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:56:20,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581105616] [2023-12-02 12:56:20,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:56:20,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:20,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:20,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:20,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:56:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:20,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-02 12:56:20,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:20,572 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 [2023-12-02 12:56:20,609 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 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 12:56:20,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 42 treesize of output 35 [2023-12-02 12:56:21,940 INFO L349 Elim1Store]: treesize reduction 312, result has 24.5 percent of original size [2023-12-02 12:56:21,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 90 treesize of output 145 [2023-12-02 12:56:22,269 INFO L349 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-12-02 12:56:22,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 46 [2023-12-02 12:56:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:56:22,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:22,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:22,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445917704] [2023-12-02 12:56:22,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:56:22,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581105616] [2023-12-02 12:56:22,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581105616] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:22,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1082746535] [2023-12-02 12:56:22,722 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:56:22,722 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:22,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:22,723 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:22,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:23,466 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:56:23,470 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:25,482 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1676#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:56:25,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:56:25,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:56:25,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-02 12:56:25,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000424565] [2023-12-02 12:56:25,482 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:25,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 12:56:25,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:25,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 12:56:25,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 12:56:25,484 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 12:56:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:26,567 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2023-12-02 12:56:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 12:56:26,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2023-12-02 12:56:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:26,569 INFO L225 Difference]: With dead ends: 88 [2023-12-02 12:56:26,569 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 12:56:26,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=331, Invalid=2321, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 12:56:26,571 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:26,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 117 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 12:56:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 12:56:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2023-12-02 12:56:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 17 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 12:56:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2023-12-02 12:56:26,591 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 31 [2023-12-02 12:56:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:26,591 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2023-12-02 12:56:26,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 12:56:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2023-12-02 12:56:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 12:56:26,593 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:26,593 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:26,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:56:26,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:26,793 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:26,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:26,794 INFO L85 PathProgramCache]: Analyzing trace with hash -626440862, now seen corresponding path program 5 times [2023-12-02 12:56:26,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:26,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295031496] [2023-12-02 12:56:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:26,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:26,815 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:56:26,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998964557] [2023-12-02 12:56:26,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:56:26,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:26,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:26,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:26,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:56:26,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:56:26,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:26,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:56:26,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:56:26,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:56:27,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:27,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295031496] [2023-12-02 12:56:27,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:56:27,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998964557] [2023-12-02 12:56:27,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998964557] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:27,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849650587] [2023-12-02 12:56:27,046 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:56:27,046 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:27,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:27,047 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:27,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:27,587 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:56:27,591 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:28,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2150#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:56:28,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:56:28,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:56:28,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-02 12:56:28,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895663079] [2023-12-02 12:56:28,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:28,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 12:56:28,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 12:56:28,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2023-12-02 12:56:28,661 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:28,919 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2023-12-02 12:56:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:56:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2023-12-02 12:56:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:28,921 INFO L225 Difference]: With dead ends: 120 [2023-12-02 12:56:28,921 INFO L226 Difference]: Without dead ends: 117 [2023-12-02 12:56:28,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 12:56:28,922 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 59 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:28,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 106 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:56:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-02 12:56:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 76. [2023-12-02 12:56:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-02 12:56:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2023-12-02 12:56:28,943 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 32 [2023-12-02 12:56:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:28,943 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2023-12-02 12:56:28,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2023-12-02 12:56:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 12:56:28,944 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:28,944 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:28,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:56:29,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:29,145 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:29,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:29,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2078840897, now seen corresponding path program 6 times [2023-12-02 12:56:29,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:29,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318735727] [2023-12-02 12:56:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:29,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:29,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:56:29,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354294663] [2023-12-02 12:56:29,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:56:29,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:29,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:29,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:29,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 12:56:29,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:56:29,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:29,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:56:29,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:56:29,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:56:29,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318735727] [2023-12-02 12:56:29,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:56:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354294663] [2023-12-02 12:56:29,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354294663] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756084528] [2023-12-02 12:56:29,382 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:56:29,382 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:29,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:29,383 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:29,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:30,153 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:56:30,158 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:31,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2677#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:56:31,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:56:31,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:56:31,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-02 12:56:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363842686] [2023-12-02 12:56:31,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:31,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 12:56:31,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 12:56:31,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2023-12-02 12:56:31,471 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:31,722 INFO L93 Difference]: Finished difference Result 147 states and 195 transitions. [2023-12-02 12:56:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:56:31,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2023-12-02 12:56:31,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:31,724 INFO L225 Difference]: With dead ends: 147 [2023-12-02 12:56:31,724 INFO L226 Difference]: Without dead ends: 139 [2023-12-02 12:56:31,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 12:56:31,725 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:31,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 101 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:56:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-02 12:56:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2023-12-02 12:56:31,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-02 12:56:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2023-12-02 12:56:31,748 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 32 [2023-12-02 12:56:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:31,749 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2023-12-02 12:56:31,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2023-12-02 12:56:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 12:56:31,750 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:31,750 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:31,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 12:56:31,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:31,951 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:31,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:31,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2054854557, now seen corresponding path program 7 times [2023-12-02 12:56:31,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:31,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181277088] [2023-12-02 12:56:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:31,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:31,965 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:56:31,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649447053] [2023-12-02 12:56:31,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:56:31,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:31,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:31,967 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:31,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:56:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:32,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-02 12:56:32,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:32,093 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 [2023-12-02 12:56:32,137 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 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 12:56:32,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 42 treesize of output 35 [2023-12-02 12:56:32,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2023-12-02 12:56:34,000 INFO L349 Elim1Store]: treesize reduction 468, result has 24.4 percent of original size [2023-12-02 12:56:34,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 118 treesize of output 207 [2023-12-02 12:56:34,715 INFO L349 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-12-02 12:56:34,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2023-12-02 12:56:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 12:56:34,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:36,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:36,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181277088] [2023-12-02 12:56:36,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:56:36,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649447053] [2023-12-02 12:56:36,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649447053] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:36,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271139122] [2023-12-02 12:56:36,214 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:56:36,215 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:36,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:36,215 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:36,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:36,725 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:56:36,730 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:39,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3230#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:56:39,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:56:39,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:56:39,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-02 12:56:39,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624544669] [2023-12-02 12:56:39,022 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:39,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 12:56:39,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:39,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 12:56:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2093, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 12:56:39,024 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:56:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:40,659 INFO L93 Difference]: Finished difference Result 117 states and 150 transitions. [2023-12-02 12:56:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 12:56:40,660 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 33 [2023-12-02 12:56:40,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:40,661 INFO L225 Difference]: With dead ends: 117 [2023-12-02 12:56:40,661 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 12:56:40,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=407, Invalid=3253, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 12:56:40,663 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:40,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 104 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 12:56:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 12:56:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 91. [2023-12-02 12:56:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 12:56:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2023-12-02 12:56:40,706 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 33 [2023-12-02 12:56:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:40,706 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2023-12-02 12:56:40,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:56:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2023-12-02 12:56:40,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 12:56:40,707 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:40,707 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:40,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:56:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 12:56:40,908 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:40,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1311278017, now seen corresponding path program 8 times [2023-12-02 12:56:40,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:40,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622909543] [2023-12-02 12:56:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:40,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:56:40,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283460455] [2023-12-02 12:56:40,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:56:40,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:40,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:40,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:40,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 12:56:41,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 12:56:41,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:41,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:56:41,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:56:41,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:56:41,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:41,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622909543] [2023-12-02 12:56:41,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:56:41,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283460455] [2023-12-02 12:56:41,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283460455] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:41,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [987841920] [2023-12-02 12:56:41,207 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:56:41,207 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:41,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:41,208 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:41,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:41,910 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:56:41,915 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:43,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3811#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:56:43,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:56:43,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:56:43,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-02 12:56:43,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883431120] [2023-12-02 12:56:43,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:43,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 12:56:43,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:43,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 12:56:43,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 12:56:43,260 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:43,678 INFO L93 Difference]: Finished difference Result 163 states and 210 transitions. [2023-12-02 12:56:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:56:43,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2023-12-02 12:56:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:43,679 INFO L225 Difference]: With dead ends: 163 [2023-12-02 12:56:43,680 INFO L226 Difference]: Without dead ends: 160 [2023-12-02 12:56:43,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 12:56:43,681 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 79 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:43,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 176 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:56:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-02 12:56:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 102. [2023-12-02 12:56:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-12-02 12:56:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2023-12-02 12:56:43,722 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 34 [2023-12-02 12:56:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:43,723 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2023-12-02 12:56:43,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2023-12-02 12:56:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 12:56:43,724 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:43,724 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:43,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 12:56:43,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 12:56:43,924 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:43,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash -724333374, now seen corresponding path program 9 times [2023-12-02 12:56:43,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:43,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052866641] [2023-12-02 12:56:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:43,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:43,939 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:56:43,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149733214] [2023-12-02 12:56:43,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:56:43,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:43,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:43,940 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:43,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 12:56:44,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:56:44,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:44,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:56:44,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:56:44,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:56:44,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:44,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052866641] [2023-12-02 12:56:44,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:56:44,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149733214] [2023-12-02 12:56:44,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149733214] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:44,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2129636038] [2023-12-02 12:56:44,162 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:56:44,162 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:44,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:44,163 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:44,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:44,850 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:56:44,855 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:46,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4463#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:56:46,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:56:46,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:56:46,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-02 12:56:46,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949326983] [2023-12-02 12:56:46,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:46,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 12:56:46,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:46,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 12:56:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 12:56:46,250 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:46,882 INFO L93 Difference]: Finished difference Result 238 states and 322 transitions. [2023-12-02 12:56:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 12:56:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2023-12-02 12:56:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:46,884 INFO L225 Difference]: With dead ends: 238 [2023-12-02 12:56:46,884 INFO L226 Difference]: Without dead ends: 229 [2023-12-02 12:56:46,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 12:56:46,886 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 159 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:46,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 163 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:56:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-12-02 12:56:46,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 103. [2023-12-02 12:56:46,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-12-02 12:56:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2023-12-02 12:56:46,930 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 34 [2023-12-02 12:56:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:46,930 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2023-12-02 12:56:46,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:56:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2023-12-02 12:56:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 12:56:46,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:46,931 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:46,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 12:56:47,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 12:56:47,132 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:47,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:47,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1994597662, now seen corresponding path program 10 times [2023-12-02 12:56:47,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:47,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272722992] [2023-12-02 12:56:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:47,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:47,148 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:56:47,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845591568] [2023-12-02 12:56:47,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:56:47,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:47,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:47,149 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:47,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 12:56:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:47,272 WARN L260 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 93 conjunts are in the unsatisfiable core [2023-12-02 12:56:47,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:47,294 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 [2023-12-02 12:56:47,324 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 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 12:56:47,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 42 treesize of output 35 [2023-12-02 12:56:47,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2023-12-02 12:56:47,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2023-12-02 12:56:49,968 INFO L349 Elim1Store]: treesize reduction 624, result has 24.4 percent of original size [2023-12-02 12:56:49,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 9 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 80 case distinctions, treesize of input 146 treesize of output 269 [2023-12-02 12:56:51,459 INFO L349 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-12-02 12:56:51,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 120 [2023-12-02 12:56:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:56:51,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:54,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272722992] [2023-12-02 12:56:54,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:56:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845591568] [2023-12-02 12:56:54,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845591568] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1366644740] [2023-12-02 12:56:54,413 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:56:54,413 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:54,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:54,413 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:54,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:56:55,088 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:56:55,093 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:56:57,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5219#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:56:57,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:56:57,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:56:57,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-02 12:56:57,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424631510] [2023-12-02 12:56:57,987 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 12:56:57,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 12:56:57,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:56:57,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 12:56:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2769, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 12:56:57,989 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:57:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:01,104 INFO L93 Difference]: Finished difference Result 145 states and 186 transitions. [2023-12-02 12:57:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 12:57:01,104 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2023-12-02 12:57:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:01,105 INFO L225 Difference]: With dead ends: 145 [2023-12-02 12:57:01,105 INFO L226 Difference]: Without dead ends: 142 [2023-12-02 12:57:01,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=503, Invalid=4327, Unknown=0, NotChecked=0, Total=4830 [2023-12-02 12:57:01,108 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:01,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 143 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 12:57:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-12-02 12:57:01,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2023-12-02 12:57:01,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 74 states have internal predecessors, (85), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-12-02 12:57:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2023-12-02 12:57:01,167 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 35 [2023-12-02 12:57:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:01,167 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2023-12-02 12:57:01,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:57:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2023-12-02 12:57:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 12:57:01,169 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:01,169 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:01,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 12:57:01,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 12:57:01,370 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:01,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:01,370 INFO L85 PathProgramCache]: Analyzing trace with hash 382113858, now seen corresponding path program 11 times [2023-12-02 12:57:01,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:01,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891625128] [2023-12-02 12:57:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:01,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:01,389 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:57:01,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698657714] [2023-12-02 12:57:01,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:57:01,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:01,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:01,390 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:01,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 12:57:01,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 12:57:01,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:01,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:57:01,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:57:01,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:57:01,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:01,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891625128] [2023-12-02 12:57:01,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:57:01,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698657714] [2023-12-02 12:57:01,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698657714] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:01,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900778277] [2023-12-02 12:57:01,749 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:57:01,749 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:57:01,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:57:01,750 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:57:01,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:57:02,427 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:57:02,432 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:57:03,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5905#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:57:03,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:57:03,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:57:03,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-02 12:57:03,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264942186] [2023-12-02 12:57:03,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:03,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 12:57:03,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:03,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 12:57:03,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 12:57:03,937 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:57:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:04,590 INFO L93 Difference]: Finished difference Result 207 states and 266 transitions. [2023-12-02 12:57:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 12:57:04,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2023-12-02 12:57:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:04,591 INFO L225 Difference]: With dead ends: 207 [2023-12-02 12:57:04,591 INFO L226 Difference]: Without dead ends: 204 [2023-12-02 12:57:04,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=295, Invalid=1511, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 12:57:04,593 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 96 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:04,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 261 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:57:04,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-12-02 12:57:04,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 128. [2023-12-02 12:57:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-12-02 12:57:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 166 transitions. [2023-12-02 12:57:04,647 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 166 transitions. Word has length 36 [2023-12-02 12:57:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:04,647 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 166 transitions. [2023-12-02 12:57:04,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:57:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 166 transitions. [2023-12-02 12:57:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 12:57:04,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:04,648 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:04,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 12:57:04,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 12:57:04,849 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:04,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:04,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1702670177, now seen corresponding path program 12 times [2023-12-02 12:57:04,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:04,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036557478] [2023-12-02 12:57:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:04,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:04,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:57:04,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033432661] [2023-12-02 12:57:04,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:57:04,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:04,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:04,865 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:04,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 12:57:04,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:57:04,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:04,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:57:04,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:57:05,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:57:05,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:05,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036557478] [2023-12-02 12:57:05,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:57:05,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033432661] [2023-12-02 12:57:05,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033432661] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:05,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [755675403] [2023-12-02 12:57:05,157 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:57:05,158 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:57:05,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:57:05,158 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:57:05,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:57:05,885 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:57:05,889 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:57:07,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6684#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:57:07,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:57:07,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:57:07,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-12-02 12:57:07,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893610792] [2023-12-02 12:57:07,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:07,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 12:57:07,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:07,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 12:57:07,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 12:57:07,387 INFO L87 Difference]: Start difference. First operand 128 states and 166 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:57:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:08,255 INFO L93 Difference]: Finished difference Result 359 states and 489 transitions. [2023-12-02 12:57:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 12:57:08,256 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2023-12-02 12:57:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:08,259 INFO L225 Difference]: With dead ends: 359 [2023-12-02 12:57:08,259 INFO L226 Difference]: Without dead ends: 349 [2023-12-02 12:57:08,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=385, Invalid=1871, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 12:57:08,261 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 439 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:08,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 173 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:57:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-12-02 12:57:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 129. [2023-12-02 12:57:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-12-02 12:57:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 166 transitions. [2023-12-02 12:57:08,325 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 166 transitions. Word has length 36 [2023-12-02 12:57:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:08,325 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 166 transitions. [2023-12-02 12:57:08,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:57:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 166 transitions. [2023-12-02 12:57:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 12:57:08,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:08,326 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:08,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 12:57:08,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:08,526 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:08,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1039687491, now seen corresponding path program 13 times [2023-12-02 12:57:08,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:08,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083902305] [2023-12-02 12:57:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:08,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:08,540 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:57:08,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254598400] [2023-12-02 12:57:08,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:57:08,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:08,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:08,542 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:08,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 12:57:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:08,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 88 conjunts are in the unsatisfiable core [2023-12-02 12:57:08,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:08,737 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 [2023-12-02 12:57:08,774 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 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 12:57:08,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 42 treesize of output 35 [2023-12-02 12:57:08,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2023-12-02 12:57:08,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2023-12-02 12:57:09,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2023-12-02 12:57:11,745 INFO L349 Elim1Store]: treesize reduction 780, result has 24.3 percent of original size [2023-12-02 12:57:11,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 13 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 120 case distinctions, treesize of input 174 treesize of output 331 [2023-12-02 12:57:14,170 INFO L349 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2023-12-02 12:57:14,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2023-12-02 12:57:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:57:14,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:15,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:15,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083902305] [2023-12-02 12:57:15,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:57:15,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254598400] [2023-12-02 12:57:15,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254598400] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:15,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985898046] [2023-12-02 12:57:15,385 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:57:15,385 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:57:15,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:57:15,385 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:57:15,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:57:15,894 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:57:15,901 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:57:18,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7685#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:57:18,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:57:18,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:57:18,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-02 12:57:18,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594377381] [2023-12-02 12:57:18,190 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:18,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 12:57:18,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:18,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 12:57:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2293, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 12:57:18,192 INFO L87 Difference]: Start difference. First operand 129 states and 166 transitions. Second operand has 24 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 12:57:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:21,225 INFO L93 Difference]: Finished difference Result 172 states and 221 transitions. [2023-12-02 12:57:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 12:57:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2023-12-02 12:57:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:21,227 INFO L225 Difference]: With dead ends: 172 [2023-12-02 12:57:21,227 INFO L226 Difference]: Without dead ends: 169 [2023-12-02 12:57:21,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=394, Invalid=3638, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 12:57:21,229 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:21,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 153 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 12:57:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-12-02 12:57:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 143. [2023-12-02 12:57:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 41 states have call successors, (41), 11 states have call predecessors, (41), 11 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-02 12:57:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 185 transitions. [2023-12-02 12:57:21,300 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 185 transitions. Word has length 37 [2023-12-02 12:57:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:21,301 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 185 transitions. [2023-12-02 12:57:21,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 12:57:21,301 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 185 transitions. [2023-12-02 12:57:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 12:57:21,302 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:21,302 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:21,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 12:57:21,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 12:57:21,502 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:21,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:21,503 INFO L85 PathProgramCache]: Analyzing trace with hash -153429279, now seen corresponding path program 14 times [2023-12-02 12:57:21,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:21,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138693064] [2023-12-02 12:57:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:21,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:21,519 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:57:21,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370423058] [2023-12-02 12:57:21,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:57:21,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:21,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:21,520 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:21,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 12:57:21,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 12:57:21,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:21,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:57:21,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:57:21,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:57:21,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:21,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138693064] [2023-12-02 12:57:21,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:57:21,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370423058] [2023-12-02 12:57:21,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370423058] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:21,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1670317825] [2023-12-02 12:57:21,874 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:57:21,874 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:57:21,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:57:21,875 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:57:21,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:57:22,540 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:57:22,547 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:57:23,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8468#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:57:23,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:57:23,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:57:23,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-12-02 12:57:23,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244135299] [2023-12-02 12:57:23,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:23,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 12:57:23,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 12:57:23,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1244, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 12:57:23,946 INFO L87 Difference]: Start difference. First operand 143 states and 185 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:57:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:24,595 INFO L93 Difference]: Finished difference Result 252 states and 323 transitions. [2023-12-02 12:57:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 12:57:24,595 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2023-12-02 12:57:24,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:24,596 INFO L225 Difference]: With dead ends: 252 [2023-12-02 12:57:24,596 INFO L226 Difference]: Without dead ends: 249 [2023-12-02 12:57:24,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=348, Invalid=1814, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 12:57:24,598 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 141 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:24,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 249 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:57:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-12-02 12:57:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 154. [2023-12-02 12:57:24,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 96 states have internal predecessors, (110), 45 states have call successors, (45), 12 states have call predecessors, (45), 12 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-12-02 12:57:24,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 200 transitions. [2023-12-02 12:57:24,686 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 200 transitions. Word has length 38 [2023-12-02 12:57:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:24,686 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 200 transitions. [2023-12-02 12:57:24,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:57:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 200 transitions. [2023-12-02 12:57:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 12:57:24,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:24,687 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:24,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-02 12:57:24,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 12:57:24,888 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:24,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:24,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2129110946, now seen corresponding path program 15 times [2023-12-02 12:57:24,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:24,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487423967] [2023-12-02 12:57:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:24,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:24,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:57:24,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740569431] [2023-12-02 12:57:24,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:57:24,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:24,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:24,904 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:24,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 12:57:25,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:57:25,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:25,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:57:25,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:57:25,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:57:25,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:25,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487423967] [2023-12-02 12:57:25,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:57:25,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740569431] [2023-12-02 12:57:25,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740569431] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:25,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358558564] [2023-12-02 12:57:25,322 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:57:25,322 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:57:25,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:57:25,322 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:57:25,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:57:25,982 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:57:25,987 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:57:27,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9376#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:57:27,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:57:27,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:57:27,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-12-02 12:57:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422235601] [2023-12-02 12:57:27,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 12:57:27,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 12:57:27,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 12:57:27,466 INFO L87 Difference]: Start difference. First operand 154 states and 200 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:57:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:28,633 INFO L93 Difference]: Finished difference Result 506 states and 692 transitions. [2023-12-02 12:57:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 12:57:28,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2023-12-02 12:57:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:28,636 INFO L225 Difference]: With dead ends: 506 [2023-12-02 12:57:28,636 INFO L226 Difference]: Without dead ends: 495 [2023-12-02 12:57:28,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=542, Invalid=2650, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 12:57:28,637 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 412 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:28,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 286 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 12:57:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2023-12-02 12:57:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 155. [2023-12-02 12:57:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 97 states have (on average 1.134020618556701) internal successors, (110), 97 states have internal predecessors, (110), 45 states have call successors, (45), 12 states have call predecessors, (45), 12 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-12-02 12:57:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 200 transitions. [2023-12-02 12:57:28,734 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 200 transitions. Word has length 38 [2023-12-02 12:57:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:28,735 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 200 transitions. [2023-12-02 12:57:28,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:57:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 200 transitions. [2023-12-02 12:57:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 12:57:28,735 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:28,735 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:28,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 12:57:28,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 12:57:28,936 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:28,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:28,936 INFO L85 PathProgramCache]: Analyzing trace with hash -461655554, now seen corresponding path program 16 times [2023-12-02 12:57:28,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:28,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437477070] [2023-12-02 12:57:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:28,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:28,951 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:57:28,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120943345] [2023-12-02 12:57:28,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:57:28,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:28,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:28,953 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:28,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 12:57:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:57:29,156 WARN L260 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 111 conjunts are in the unsatisfiable core [2023-12-02 12:57:29,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:29,178 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 [2023-12-02 12:57:29,213 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 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 12:57:29,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 42 treesize of output 35 [2023-12-02 12:57:29,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2023-12-02 12:57:29,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2023-12-02 12:57:29,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2023-12-02 12:57:29,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2023-12-02 12:57:33,484 INFO L349 Elim1Store]: treesize reduction 936, result has 24.3 percent of original size [2023-12-02 12:57:33,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 24 select indices, 24 select index equivalence classes, 18 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 168 case distinctions, treesize of input 202 treesize of output 393 [2023-12-02 12:57:37,975 INFO L349 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2023-12-02 12:57:37,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 470 treesize of output 218 [2023-12-02 12:57:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:57:38,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:42,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:42,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437477070] [2023-12-02 12:57:42,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:57:42,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120943345] [2023-12-02 12:57:42,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120943345] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:57:42,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [59198237] [2023-12-02 12:57:42,160 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:57:42,160 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:57:42,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:57:42,160 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:57:42,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:57:42,822 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:57:42,827 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:57:46,450 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10682#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:57:46,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:57:46,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:57:46,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-12-02 12:57:46,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512042086] [2023-12-02 12:57:46,450 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:46,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 12:57:46,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:46,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 12:57:46,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=3441, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 12:57:46,452 INFO L87 Difference]: Start difference. First operand 155 states and 200 transitions. Second operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:57:52,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:52,061 INFO L93 Difference]: Finished difference Result 201 states and 258 transitions. [2023-12-02 12:57:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 12:57:52,062 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 39 [2023-12-02 12:57:52,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:52,063 INFO L225 Difference]: With dead ends: 201 [2023-12-02 12:57:52,063 INFO L226 Difference]: Without dead ends: 198 [2023-12-02 12:57:52,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=553, Invalid=5453, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 12:57:52,066 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:52,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 176 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 12:57:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-12-02 12:57:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 169. [2023-12-02 12:57:52,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 106 states have internal predecessors, (121), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-12-02 12:57:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 219 transitions. [2023-12-02 12:57:52,172 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 219 transitions. Word has length 39 [2023-12-02 12:57:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:52,172 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 219 transitions. [2023-12-02 12:57:52,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:57:52,173 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 219 transitions. [2023-12-02 12:57:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 12:57:52,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:52,174 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:52,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 12:57:52,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:52,374 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:52,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:52,375 INFO L85 PathProgramCache]: Analyzing trace with hash 828961570, now seen corresponding path program 17 times [2023-12-02 12:57:52,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:52,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085370892] [2023-12-02 12:57:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:52,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:52,392 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:57:52,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67327165] [2023-12-02 12:57:52,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:57:52,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:52,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:52,393 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:52,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 12:57:52,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 12:57:52,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:52,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 12:57:52,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:57:52,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:57:52,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:52,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085370892] [2023-12-02 12:57:52,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:57:52,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67327165] [2023-12-02 12:57:52,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67327165] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:52,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [3698525] [2023-12-02 12:57:52,858 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:57:52,858 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:57:52,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:57:52,858 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:57:52,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:57:53,400 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:57:53,407 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:57:54,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11574#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:57:54,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:57:54,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:57:54,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2023-12-02 12:57:54,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521276586] [2023-12-02 12:57:54,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:54,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 12:57:54,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:54,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 12:57:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 12:57:54,707 INFO L87 Difference]: Start difference. First operand 169 states and 219 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:57:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:57:55,677 INFO L93 Difference]: Finished difference Result 298 states and 381 transitions. [2023-12-02 12:57:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 12:57:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 40 [2023-12-02 12:57:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:57:55,680 INFO L225 Difference]: With dead ends: 298 [2023-12-02 12:57:55,680 INFO L226 Difference]: Without dead ends: 295 [2023-12-02 12:57:55,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=408, Invalid=2142, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 12:57:55,681 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 143 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:57:55,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 367 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:57:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-12-02 12:57:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 180. [2023-12-02 12:57:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 112 states have internal predecessors, (128), 53 states have call successors, (53), 14 states have call predecessors, (53), 14 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-12-02 12:57:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 234 transitions. [2023-12-02 12:57:55,808 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 234 transitions. Word has length 40 [2023-12-02 12:57:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:57:55,808 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 234 transitions. [2023-12-02 12:57:55,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:57:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 234 transitions. [2023-12-02 12:57:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 12:57:55,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:57:55,809 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:57:55,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-02 12:57:56,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:56,009 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:57:56,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:57:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1426735487, now seen corresponding path program 18 times [2023-12-02 12:57:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:57:56,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512897336] [2023-12-02 12:57:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:57:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:57:56,024 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:57:56,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774308179] [2023-12-02 12:57:56,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:57:56,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:57:56,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:57:56,025 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:57:56,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 12:57:56,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:57:56,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:57:56,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 12:57:56,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:57:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:57:56,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:57:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:57:56,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:57:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512897336] [2023-12-02 12:57:56,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:57:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774308179] [2023-12-02 12:57:56,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774308179] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:57:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1509024106] [2023-12-02 12:57:56,496 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:57:56,496 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:57:56,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:57:56,496 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:57:56,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:57:57,164 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:57:57,169 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:57:58,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12613#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:57:58,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:57:58,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:57:58,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2023-12-02 12:57:58,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265339985] [2023-12-02 12:57:58,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:57:58,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 12:57:58,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:57:58,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 12:57:58,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 12:57:58,615 INFO L87 Difference]: Start difference. First operand 180 states and 234 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:58:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:58:00,916 INFO L93 Difference]: Finished difference Result 680 states and 932 transitions. [2023-12-02 12:58:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 12:58:00,916 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 40 [2023-12-02 12:58:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:58:00,920 INFO L225 Difference]: With dead ends: 680 [2023-12-02 12:58:00,921 INFO L226 Difference]: Without dead ends: 668 [2023-12-02 12:58:00,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=745, Invalid=3677, Unknown=0, NotChecked=0, Total=4422 [2023-12-02 12:58:00,922 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 710 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:58:00,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 363 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 12:58:00,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2023-12-02 12:58:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 181. [2023-12-02 12:58:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 113 states have internal predecessors, (128), 53 states have call successors, (53), 14 states have call predecessors, (53), 14 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-12-02 12:58:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 234 transitions. [2023-12-02 12:58:01,059 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 234 transitions. Word has length 40 [2023-12-02 12:58:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:58:01,060 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 234 transitions. [2023-12-02 12:58:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:58:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 234 transitions. [2023-12-02 12:58:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 12:58:01,060 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:58:01,060 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:58:01,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 12:58:01,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 12:58:01,261 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:58:01,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:58:01,261 INFO L85 PathProgramCache]: Analyzing trace with hash -72310307, now seen corresponding path program 19 times [2023-12-02 12:58:01,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:58:01,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417570455] [2023-12-02 12:58:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:58:01,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:58:01,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:58:01,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143451823] [2023-12-02 12:58:01,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:58:01,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:58:01,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:58:01,280 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:58:01,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 12:58:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:58:01,576 WARN L260 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-02 12:58:01,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:58:01,603 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 [2023-12-02 12:58:01,635 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 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 12:58:01,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 42 treesize of output 35 [2023-12-02 12:58:01,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2023-12-02 12:58:01,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2023-12-02 12:58:01,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2023-12-02 12:58:02,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2023-12-02 12:58:02,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 22 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 135 [2023-12-02 12:58:06,689 INFO L349 Elim1Store]: treesize reduction 1092, result has 24.3 percent of original size [2023-12-02 12:58:06,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 28 select indices, 28 select index equivalence classes, 24 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 224 case distinctions, treesize of input 230 treesize of output 455 [2023-12-02 12:58:13,427 INFO L349 Elim1Store]: treesize reduction 53, result has 7.0 percent of original size [2023-12-02 12:58:13,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 600 treesize of output 276 [2023-12-02 12:58:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:58:13,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:58:18,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:58:18,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417570455] [2023-12-02 12:58:18,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:58:18,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143451823] [2023-12-02 12:58:18,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143451823] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:58:18,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675064633] [2023-12-02 12:58:18,410 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:58:18,410 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:58:18,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:58:18,411 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:58:18,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:58:19,088 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:58:19,095 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:58:23,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14262#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:58:23,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:58:23,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:58:23,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-12-02 12:58:23,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194575496] [2023-12-02 12:58:23,157 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 12:58:23,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 12:58:23,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:58:23,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 12:58:23,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=3804, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 12:58:23,159 INFO L87 Difference]: Start difference. First operand 181 states and 234 transitions. Second operand has 31 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:58:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:58:29,706 INFO L93 Difference]: Finished difference Result 229 states and 294 transitions. [2023-12-02 12:58:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-02 12:58:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 41 [2023-12-02 12:58:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:58:29,708 INFO L225 Difference]: With dead ends: 229 [2023-12-02 12:58:29,708 INFO L226 Difference]: Without dead ends: 226 [2023-12-02 12:58:29,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=578, Invalid=6064, Unknown=0, NotChecked=0, Total=6642 [2023-12-02 12:58:29,710 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:58:29,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 159 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 12:58:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-12-02 12:58:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 195. [2023-12-02 12:58:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 122 states have (on average 1.139344262295082) internal successors, (139), 122 states have internal predecessors, (139), 57 states have call successors, (57), 15 states have call predecessors, (57), 15 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-12-02 12:58:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 253 transitions. [2023-12-02 12:58:29,867 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 253 transitions. Word has length 41 [2023-12-02 12:58:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:58:29,867 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 253 transitions. [2023-12-02 12:58:29,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:58:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 253 transitions. [2023-12-02 12:58:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 12:58:29,868 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:58:29,868 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:58:29,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 12:58:30,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 12:58:30,069 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:58:30,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:58:30,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1034802687, now seen corresponding path program 20 times [2023-12-02 12:58:30,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:58:30,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49953196] [2023-12-02 12:58:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:58:30,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:58:30,084 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:58:30,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881271727] [2023-12-02 12:58:30,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:58:30,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:58:30,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:58:30,086 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:58:30,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 12:58:30,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 12:58:30,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:58:30,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:58:30,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:58:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:58:30,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:58:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:58:30,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:58:30,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49953196] [2023-12-02 12:58:30,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:58:30,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881271727] [2023-12-02 12:58:30,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881271727] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:58:30,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270919070] [2023-12-02 12:58:30,676 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:58:30,676 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:58:30,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:58:30,676 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:58:30,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:58:31,344 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:58:31,348 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:58:32,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15257#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:58:32,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:58:32,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:58:32,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2023-12-02 12:58:32,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608624986] [2023-12-02 12:58:32,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:58:32,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 12:58:32,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:58:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 12:58:32,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1672, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 12:58:32,901 INFO L87 Difference]: Start difference. First operand 195 states and 253 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:58:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:58:34,231 INFO L93 Difference]: Finished difference Result 345 states and 440 transitions. [2023-12-02 12:58:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 12:58:34,231 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 42 [2023-12-02 12:58:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:58:34,233 INFO L225 Difference]: With dead ends: 345 [2023-12-02 12:58:34,233 INFO L226 Difference]: Without dead ends: 342 [2023-12-02 12:58:34,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 72 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=475, Invalid=2495, Unknown=0, NotChecked=0, Total=2970 [2023-12-02 12:58:34,234 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 226 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:58:34,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 347 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 12:58:34,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-12-02 12:58:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 206. [2023-12-02 12:58:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 128 states have (on average 1.140625) internal successors, (146), 128 states have internal predecessors, (146), 61 states have call successors, (61), 16 states have call predecessors, (61), 16 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-12-02 12:58:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 268 transitions. [2023-12-02 12:58:34,411 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 268 transitions. Word has length 42 [2023-12-02 12:58:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:58:34,411 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 268 transitions. [2023-12-02 12:58:34,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:58:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 268 transitions. [2023-12-02 12:58:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 12:58:34,412 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:58:34,412 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:58:34,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 12:58:34,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:58:34,613 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:58:34,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:58:34,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2053032578, now seen corresponding path program 21 times [2023-12-02 12:58:34,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:58:34,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178131833] [2023-12-02 12:58:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:58:34,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:58:34,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:58:34,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631591716] [2023-12-02 12:58:34,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:58:34,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:58:34,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:58:34,630 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:58:34,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 12:58:34,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:58:34,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:58:34,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:58:34,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:58:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 44 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:58:35,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:58:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:58:35,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:58:35,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178131833] [2023-12-02 12:58:35,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:58:35,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631591716] [2023-12-02 12:58:35,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631591716] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:58:35,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915293768] [2023-12-02 12:58:35,290 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:58:35,291 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:58:35,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:58:35,291 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:58:35,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:58:35,800 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:58:35,804 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:58:37,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16429#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:58:37,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:58:37,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:58:37,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2023-12-02 12:58:37,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755838254] [2023-12-02 12:58:37,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:58:37,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 12:58:37,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:58:37,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 12:58:37,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1625, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 12:58:37,168 INFO L87 Difference]: Start difference. First operand 206 states and 268 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:58:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:58:39,975 INFO L93 Difference]: Finished difference Result 882 states and 1210 transitions. [2023-12-02 12:58:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-02 12:58:39,975 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 42 [2023-12-02 12:58:39,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:58:39,979 INFO L225 Difference]: With dead ends: 882 [2023-12-02 12:58:39,979 INFO L226 Difference]: Without dead ends: 869 [2023-12-02 12:58:39,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 72 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1000, Invalid=5006, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 12:58:39,980 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1316 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 1294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1294 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:58:39,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 397 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1294 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 12:58:39,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2023-12-02 12:58:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 207. [2023-12-02 12:58:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 129 states have (on average 1.1317829457364341) internal successors, (146), 129 states have internal predecessors, (146), 61 states have call successors, (61), 16 states have call predecessors, (61), 16 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-12-02 12:58:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 268 transitions. [2023-12-02 12:58:40,206 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 268 transitions. Word has length 42 [2023-12-02 12:58:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:58:40,207 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 268 transitions. [2023-12-02 12:58:40,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:58:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 268 transitions. [2023-12-02 12:58:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 12:58:40,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:58:40,208 INFO L195 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:58:40,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-02 12:58:40,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:58:40,408 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:58:40,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:58:40,409 INFO L85 PathProgramCache]: Analyzing trace with hash -988114688, now seen corresponding path program 1 times [2023-12-02 12:58:40,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:58:40,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971530277] [2023-12-02 12:58:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:58:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:58:40,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:58:40,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047580506] [2023-12-02 12:58:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:58:40,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:58:40,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:58:40,420 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:58:40,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 12:58:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:58:40,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 12:58:40,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:58:40,540 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 [2023-12-02 12:58:40,748 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 0 case distinctions, treesize of input 20 treesize of output 20 [2023-12-02 12:58:40,754 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 20 treesize of output 15 [2023-12-02 12:58:41,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:58:41,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2023-12-02 12:58:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 44 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:58:41,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:58:41,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:58:41,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971530277] [2023-12-02 12:58:41,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:58:41,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047580506] [2023-12-02 12:58:41,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047580506] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:58:41,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28559017] [2023-12-02 12:58:41,262 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:58:41,262 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:58:41,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:58:41,263 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:58:41,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:58:44,180 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-12-02 12:58:44,181 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:58:46,174 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18435#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:58:46,174 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:58:46,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:58:46,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-02 12:58:46,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458223661] [2023-12-02 12:58:46,175 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 12:58:46,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 12:58:46,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:58:46,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 12:58:46,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1141, Unknown=5, NotChecked=0, Total=1260 [2023-12-02 12:58:46,176 INFO L87 Difference]: Start difference. First operand 207 states and 268 transitions. Second operand has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 12:58:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:58:47,046 INFO L93 Difference]: Finished difference Result 221 states and 282 transitions. [2023-12-02 12:58:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 12:58:47,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 46 [2023-12-02 12:58:47,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:58:47,048 INFO L225 Difference]: With dead ends: 221 [2023-12-02 12:58:47,048 INFO L226 Difference]: Without dead ends: 184 [2023-12-02 12:58:47,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=144, Invalid=1333, Unknown=5, NotChecked=0, Total=1482 [2023-12-02 12:58:47,049 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:58:47,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 105 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:58:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-12-02 12:58:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-12-02 12:58:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 53 states have call successors, (53), 14 states have call predecessors, (53), 14 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2023-12-02 12:58:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 237 transitions. [2023-12-02 12:58:47,241 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 237 transitions. Word has length 46 [2023-12-02 12:58:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:58:47,242 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 237 transitions. [2023-12-02 12:58:47,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 12:58:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 237 transitions. [2023-12-02 12:58:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 12:58:47,243 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:58:47,243 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:58:47,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-02 12:58:47,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:58:47,444 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:58:47,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:58:47,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2014427426, now seen corresponding path program 22 times [2023-12-02 12:58:47,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:58:47,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452346848] [2023-12-02 12:58:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:58:47,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:58:47,457 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:58:47,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324189445] [2023-12-02 12:58:47,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:58:47,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:58:47,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:58:47,459 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:58:47,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 12:58:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:58:47,913 WARN L260 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 129 conjunts are in the unsatisfiable core [2023-12-02 12:58:47,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:58:47,937 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 [2023-12-02 12:58:47,975 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 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 12:58:48,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 42 treesize of output 35 [2023-12-02 12:58:48,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2023-12-02 12:58:48,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2023-12-02 12:58:48,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2023-12-02 12:58:48,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2023-12-02 12:58:48,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 22 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 135 [2023-12-02 12:58:48,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 29 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 155 [2023-12-02 12:58:54,158 INFO L349 Elim1Store]: treesize reduction 1248, result has 24.3 percent of original size [2023-12-02 12:58:54,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 32 select indices, 32 select index equivalence classes, 31 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 288 case distinctions, treesize of input 258 treesize of output 517 [2023-12-02 12:59:05,063 INFO L349 Elim1Store]: treesize reduction 61, result has 6.2 percent of original size [2023-12-02 12:59:05,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 744 treesize of output 340 [2023-12-02 12:59:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:59:05,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:59:11,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:59:11,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452346848] [2023-12-02 12:59:11,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:59:11,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324189445] [2023-12-02 12:59:11,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324189445] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:59:11,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [482092247] [2023-12-02 12:59:11,817 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:59:11,817 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:59:11,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:59:11,817 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:59:11,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:59:12,563 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:59:12,568 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:59:17,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19340#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:59:17,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:59:17,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:59:17,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2023-12-02 12:59:17,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46505162] [2023-12-02 12:59:17,450 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 12:59:17,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 12:59:17,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:59:17,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 12:59:17,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=4185, Unknown=0, NotChecked=0, Total=4556 [2023-12-02 12:59:17,452 INFO L87 Difference]: Start difference. First operand 184 states and 237 transitions. Second operand has 33 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:59:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:59:26,751 INFO L93 Difference]: Finished difference Result 233 states and 298 transitions. [2023-12-02 12:59:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 12:59:26,751 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 43 [2023-12-02 12:59:26,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:59:26,753 INFO L225 Difference]: With dead ends: 233 [2023-12-02 12:59:26,753 INFO L226 Difference]: Without dead ends: 230 [2023-12-02 12:59:26,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=603, Invalid=6707, Unknown=0, NotChecked=0, Total=7310 [2023-12-02 12:59:26,754 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:59:26,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 181 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 12:59:26,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-12-02 12:59:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 198. [2023-12-02 12:59:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 125 states have (on average 1.136) internal successors, (142), 125 states have internal predecessors, (142), 57 states have call successors, (57), 15 states have call predecessors, (57), 15 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-12-02 12:59:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 256 transitions. [2023-12-02 12:59:27,040 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 256 transitions. Word has length 43 [2023-12-02 12:59:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:59:27,041 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 256 transitions. [2023-12-02 12:59:27,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:59:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 256 transitions. [2023-12-02 12:59:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 12:59:27,042 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:59:27,042 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:59:27,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-02 12:59:27,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 12:59:27,243 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:59:27,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:59:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash 743331330, now seen corresponding path program 23 times [2023-12-02 12:59:27,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:59:27,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085385234] [2023-12-02 12:59:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:59:27,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:59:27,260 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:59:27,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30297602] [2023-12-02 12:59:27,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:59:27,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:59:27,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:59:27,261 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:59:27,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 12:59:27,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 12:59:27,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:59:27,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:59:27,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:59:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 44 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:59:27,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:59:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:59:27,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:59:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085385234] [2023-12-02 12:59:27,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:59:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30297602] [2023-12-02 12:59:27,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30297602] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:59:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9809663] [2023-12-02 12:59:27,937 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:59:27,937 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:59:27,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:59:27,937 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:59:27,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:59:28,584 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:59:28,589 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:59:30,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20366#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:59:30,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:59:30,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:59:30,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2023-12-02 12:59:30,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740954157] [2023-12-02 12:59:30,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:59:30,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 12:59:30,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:59:30,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 12:59:30,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1907, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 12:59:30,028 INFO L87 Difference]: Start difference. First operand 198 states and 256 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:59:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:59:31,459 INFO L93 Difference]: Finished difference Result 365 states and 465 transitions. [2023-12-02 12:59:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 12:59:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 44 [2023-12-02 12:59:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:59:31,462 INFO L225 Difference]: With dead ends: 365 [2023-12-02 12:59:31,462 INFO L226 Difference]: Without dead ends: 362 [2023-12-02 12:59:31,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 74 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=549, Invalid=2873, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 12:59:31,463 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 274 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:59:31,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 385 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 12:59:31,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-12-02 12:59:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 209. [2023-12-02 12:59:31,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 61 states have call successors, (61), 16 states have call predecessors, (61), 16 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-12-02 12:59:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 271 transitions. [2023-12-02 12:59:31,799 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 271 transitions. Word has length 44 [2023-12-02 12:59:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:59:31,799 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 271 transitions. [2023-12-02 12:59:31,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:59:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 271 transitions. [2023-12-02 12:59:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 12:59:31,801 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:59:31,801 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:59:31,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 12:59:32,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 12:59:32,001 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:59:32,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:59:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1976944033, now seen corresponding path program 24 times [2023-12-02 12:59:32,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:59:32,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112226803] [2023-12-02 12:59:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:59:32,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:59:32,020 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:59:32,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315928831] [2023-12-02 12:59:32,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:59:32,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:59:32,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:59:32,021 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:59:32,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 12:59:32,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:59:32,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:59:32,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:59:32,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:59:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:59:32,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:59:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:59:32,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:59:32,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112226803] [2023-12-02 12:59:32,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 12:59:32,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315928831] [2023-12-02 12:59:32,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315928831] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:59:32,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785086689] [2023-12-02 12:59:32,708 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:59:32,708 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:59:32,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:59:32,708 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:59:32,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:59:33,429 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 41 for LOIs [2023-12-02 12:59:33,433 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:59:35,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21596#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-12-02 12:59:35,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:59:35,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:59:35,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2023-12-02 12:59:35,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086057117] [2023-12-02 12:59:35,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:59:35,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 12:59:35,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:59:35,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 12:59:35,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1849, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 12:59:35,069 INFO L87 Difference]: Start difference. First operand 209 states and 271 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:59:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:59:38,630 INFO L93 Difference]: Finished difference Result 997 states and 1365 transitions. [2023-12-02 12:59:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-02 12:59:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 44 [2023-12-02 12:59:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:59:38,634 INFO L225 Difference]: With dead ends: 997 [2023-12-02 12:59:38,634 INFO L226 Difference]: Without dead ends: 983 [2023-12-02 12:59:38,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 74 SyntacticMatches, 10 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2573 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1284, Invalid=6548, Unknown=0, NotChecked=0, Total=7832 [2023-12-02 12:59:38,635 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1289 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:59:38,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 557 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1415 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 12:59:38,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2023-12-02 12:59:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 210. [2023-12-02 12:59:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 132 states have (on average 1.128787878787879) internal successors, (149), 132 states have internal predecessors, (149), 61 states have call successors, (61), 16 states have call predecessors, (61), 16 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-12-02 12:59:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 271 transitions. [2023-12-02 12:59:38,963 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 271 transitions. Word has length 44 [2023-12-02 12:59:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:59:38,963 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 271 transitions. [2023-12-02 12:59:38,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 12:59:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 271 transitions. [2023-12-02 12:59:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 12:59:38,965 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:59:38,965 INFO L195 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:59:38,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-02 12:59:39,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 12:59:39,166 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:59:39,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:59:39,166 INFO L85 PathProgramCache]: Analyzing trace with hash 669949155, now seen corresponding path program 2 times [2023-12-02 12:59:39,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:59:39,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384380424] [2023-12-02 12:59:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:59:39,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:59:39,178 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 12:59:39,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445463895] [2023-12-02 12:59:39,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:59:39,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:59:39,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:59:39,179 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:59:39,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d292c0a-b6e0-47d6-b008-04d734d5dd55/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 12:59:39,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 12:59:39,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:59:39,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-02 12:59:39,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:59:39,431 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 [2023-12-02 12:59:39,453 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 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 12:59:39,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 42 treesize of output 35 [2023-12-02 12:59:40,934 INFO L349 Elim1Store]: treesize reduction 636, result has 19.8 percent of original size [2023-12-02 12:59:40,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 5 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 60 case distinctions, treesize of input 118 treesize of output 213