./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array9_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array9_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire --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 8ae6792b63619c19d32145c9c656ded5ce2ab653945337eaf95cf4eb94965d3b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:28:41,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:28:41,622 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:28:41,630 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:28:41,631 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:28:41,670 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:28:41,671 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:28:41,672 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:28:41,673 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:28:41,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:28:41,678 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:28:41,679 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:28:41,680 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:28:41,682 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:28:41,682 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:28:41,683 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:28:41,683 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:28:41,683 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:28:41,684 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:28:41,684 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:28:41,685 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:28:41,685 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:28:41,687 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:28:41,687 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:28:41,687 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:28:41,688 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:28:41,688 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:28:41,689 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:28:41,689 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:28:41,690 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:28:41,691 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:28:41,691 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:28:41,692 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:28:41,692 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:28:41,692 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:28:41,692 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:28:41,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:28:41,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:41,693 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:28:41,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:28:41,694 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:28:41,694 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:28:41,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:28:41,695 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:28:41,695 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:28:41,695 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:28:41,696 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:28:41,696 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_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ae6792b63619c19d32145c9c656ded5ce2ab653945337eaf95cf4eb94965d3b [2023-11-23 21:28:42,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:28:42,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:28:42,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:28:42,097 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:28:42,097 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:28:42,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/array-patterns/array9_pattern.c [2023-11-23 21:28:45,192 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:28:45,451 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:28:45,451 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/sv-benchmarks/c/array-patterns/array9_pattern.c [2023-11-23 21:28:45,460 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/data/ee65a486e/5c81cec4f2bd4b769d7f82eed4b68c18/FLAG673c9ff1f [2023-11-23 21:28:45,476 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/data/ee65a486e/5c81cec4f2bd4b769d7f82eed4b68c18 [2023-11-23 21:28:45,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:28:45,482 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:28:45,486 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:45,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:28:45,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:28:45,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47299d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45, skipping insertion in model container [2023-11-23 21:28:45,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,521 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:28:45,708 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_2722ec26-e13e-4df4-87a9-ae4b93d103d5/sv-benchmarks/c/array-patterns/array9_pattern.c[1352,1365] [2023-11-23 21:28:45,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:45,757 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:28:45,775 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_2722ec26-e13e-4df4-87a9-ae4b93d103d5/sv-benchmarks/c/array-patterns/array9_pattern.c[1352,1365] [2023-11-23 21:28:45,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:45,811 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:28:45,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45 WrapperNode [2023-11-23 21:28:45,813 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:45,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:45,815 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:28:45,815 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:28:45,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,839 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,866 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-11-23 21:28:45,867 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:45,868 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:28:45,868 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:28:45,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:28:45,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,881 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,881 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,889 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,903 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,904 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,905 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,908 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:28:45,908 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:28:45,909 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:28:45,909 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:28:45,910 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (1/1) ... [2023-11-23 21:28:45,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:45,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:45,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:28:46,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:28:46,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:28:46,029 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:28:46,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:28:46,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:28:46,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:28:46,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:28:46,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:28:46,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:28:46,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:28:46,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:28:46,108 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:28:46,110 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:28:46,286 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:28:46,387 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:28:46,393 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:28:46,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:46 BoogieIcfgContainer [2023-11-23 21:28:46,395 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:28:46,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:28:46,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:28:46,427 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:28:46,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:28:45" (1/3) ... [2023-11-23 21:28:46,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1778819a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:46, skipping insertion in model container [2023-11-23 21:28:46,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:45" (2/3) ... [2023-11-23 21:28:46,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1778819a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:46, skipping insertion in model container [2023-11-23 21:28:46,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:46" (3/3) ... [2023-11-23 21:28:46,434 INFO L112 eAbstractionObserver]: Analyzing ICFG array9_pattern.c [2023-11-23 21:28:46,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:28:46,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:28:46,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:28:46,527 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;@7114bcde, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:28:46,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:28:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:28:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:28:46,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:46,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:46,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:46,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash -99249330, now seen corresponding path program 1 times [2023-11-23 21:28:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:46,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119900248] [2023-11-23 21:28:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:46,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:46,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:46,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119900248] [2023-11-23 21:28:46,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119900248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:46,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:46,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:28:46,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845152877] [2023-11-23 21:28:46,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:46,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:28:46,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:46,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:28:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:28:46,821 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2023-11-23 21:28:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:46,865 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-11-23 21:28:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:28:46,868 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 [2023-11-23 21:28:46,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:46,875 INFO L225 Difference]: With dead ends: 24 [2023-11-23 21:28:46,875 INFO L226 Difference]: Without dead ends: 15 [2023-11-23 21:28:46,878 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 [2023-11-23 21:28:46,882 INFO L413 NwaCegarLoop]: 12 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, 12 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 [2023-11-23 21:28:46,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:28:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-23 21:28:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-23 21:28:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:28:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-23 21:28:46,922 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2023-11-23 21:28:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:46,923 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-23 21:28:46,924 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) [2023-11-23 21:28:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-23 21:28:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:28:46,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:46,926 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:46,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:28:46,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:46,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:46,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1383980226, now seen corresponding path program 1 times [2023-11-23 21:28:46,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:46,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795033375] [2023-11-23 21:28:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:46,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:46,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:46,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847805224] [2023-11-23 21:28:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:46,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:46,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:46,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:46,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:28:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:47,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:28:47,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:47,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:47,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:47,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795033375] [2023-11-23 21:28:47,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:47,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847805224] [2023-11-23 21:28:47,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847805224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:47,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:47,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:28:47,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177247623] [2023-11-23 21:28:47,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:47,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:28:47,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:47,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:28:47,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:47,170 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:28:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:47,277 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-11-23 21:28:47,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:28:47,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-23 21:28:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:47,282 INFO L225 Difference]: With dead ends: 35 [2023-11-23 21:28:47,282 INFO L226 Difference]: Without dead ends: 20 [2023-11-23 21:28:47,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:28:47,285 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:47,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 35 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:28:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-23 21:28:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2023-11-23 21:28:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:28:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-23 21:28:47,291 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2023-11-23 21:28:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:47,292 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-23 21:28:47,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:28:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-23 21:28:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:28:47,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:47,294 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:47,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:47,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:47,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:47,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash 764216395, now seen corresponding path program 1 times [2023-11-23 21:28:47,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:47,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692805241] [2023-11-23 21:28:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:47,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:47,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:47,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764485771] [2023-11-23 21:28:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:47,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:47,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:47,595 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:47,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:28:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:47,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:28:47,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:47,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:28:47,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:47,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692805241] [2023-11-23 21:28:47,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:47,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764485771] [2023-11-23 21:28:47,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764485771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:47,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2079553394] [2023-11-23 21:28:47,843 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:28:47,843 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:28:47,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:28:47,853 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:28:47,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:28:49,001 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:28:49,003 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:28:50,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2079553394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:50,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:28:50,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 5] total 16 [2023-11-23 21:28:50,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109404075] [2023-11-23 21:28:50,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:50,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:28:50,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:50,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:28:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:28:50,148 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:28:51,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:51,338 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2023-11-23 21:28:51,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:28:51,338 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-23 21:28:51,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:51,339 INFO L225 Difference]: With dead ends: 23 [2023-11-23 21:28:51,339 INFO L226 Difference]: Without dead ends: 20 [2023-11-23 21:28:51,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:28:51,341 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:51,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-23 21:28:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-11-23 21:28:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:28:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-23 21:28:51,361 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2023-11-23 21:28:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:51,362 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-23 21:28:51,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:28:51,363 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-23 21:28:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 21:28:51,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:51,365 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:51,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:51,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:51,585 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:51,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:51,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2079447255, now seen corresponding path program 1 times [2023-11-23 21:28:51,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:51,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701087425] [2023-11-23 21:28:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:51,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:51,611 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:51,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748231822] [2023-11-23 21:28:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:51,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:51,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:51,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:51,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:28:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:51,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-23 21:28:51,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:51,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:28:51,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-23 21:28:51,825 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2023-11-23 21:28:52,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:52,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:52,274 INFO L349 Elim1Store]: treesize reduction 25, result has 41.9 percent of original size [2023-11-23 21:28:52,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 71 [2023-11-23 21:28:52,315 INFO L349 Elim1Store]: treesize reduction 25, result has 41.9 percent of original size [2023-11-23 21:28:52,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 70 [2023-11-23 21:28:52,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 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 24 treesize of output 24 [2023-11-23 21:28:52,339 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2023-11-23 21:28:52,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-23 21:28:52,441 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-23 21:28:52,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2023-11-23 21:28:52,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 21:28:52,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-11-23 21:28:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:52,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:53,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:53,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701087425] [2023-11-23 21:28:53,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:53,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748231822] [2023-11-23 21:28:53,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748231822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:28:53,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871262747] [2023-11-23 21:28:53,413 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:28:53,414 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:28:53,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:28:53,414 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:28:53,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:28:54,047 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:28:54,048 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:28:55,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '485#(and (<= |ULTIMATE.start_main_~index~0#1| 32767) (<= (+ 3 ~ARR_SIZE~0) (* 3 |ULTIMATE.start_main_~sum~0#1|)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-23 21:28:55,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:28:55,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:28:55,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-23 21:28:55,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707247956] [2023-11-23 21:28:55,312 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 21:28:55,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:28:55,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:28:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=857, Unknown=3, NotChecked=0, Total=992 [2023-11-23 21:28:55,315 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:28:55,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:55,785 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-11-23 21:28:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:28:55,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-23 21:28:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:55,787 INFO L225 Difference]: With dead ends: 41 [2023-11-23 21:28:55,787 INFO L226 Difference]: Without dead ends: 38 [2023-11-23 21:28:55,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=155, Invalid=1031, Unknown=4, NotChecked=0, Total=1190 [2023-11-23 21:28:55,790 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:55,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 68 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 10 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:28:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-23 21:28:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2023-11-23 21:28:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:28:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-23 21:28:55,807 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2023-11-23 21:28:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:55,807 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-23 21:28:55,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:28:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-23 21:28:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:28:55,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:55,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:55,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:56,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:56,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:56,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:56,024 INFO L85 PathProgramCache]: Analyzing trace with hash -38707189, now seen corresponding path program 2 times [2023-11-23 21:28:56,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:56,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890736757] [2023-11-23 21:28:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:56,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:56,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:56,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970750751] [2023-11-23 21:28:56,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:28:56,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:56,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:56,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:56,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:28:56,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:28:56,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:28:56,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:28:56,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:56,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:28:56,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:56,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890736757] [2023-11-23 21:28:56,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:56,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970750751] [2023-11-23 21:28:56,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970750751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:56,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [350971396] [2023-11-23 21:28:56,247 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:28:56,248 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:28:56,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:28:56,248 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:28:56,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:28:56,961 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:28:56,963 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:28:57,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '723#(and (<= |ULTIMATE.start_main_~index~0#1| 32767) (<= (+ 3 ~ARR_SIZE~0) (* 3 |ULTIMATE.start_main_~sum~0#1|)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-23 21:28:57,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:28:57,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:28:57,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-23 21:28:57,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901731152] [2023-11-23 21:28:57,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:28:57,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:28:57,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:57,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:28:57,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:28:57,930 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:28:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:58,070 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-11-23 21:28:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:28:58,071 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-23 21:28:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:58,072 INFO L225 Difference]: With dead ends: 49 [2023-11-23 21:28:58,072 INFO L226 Difference]: Without dead ends: 42 [2023-11-23 21:28:58,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:28:58,073 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:58,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 49 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:28:58,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-23 21:28:58,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2023-11-23 21:28:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:28:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-11-23 21:28:58,096 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 19 [2023-11-23 21:28:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:58,097 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-11-23 21:28:58,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:28:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-11-23 21:28:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:28:58,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:58,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:58,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:58,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:58,311 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:58,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash 753203446, now seen corresponding path program 3 times [2023-11-23 21:28:58,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:58,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211672749] [2023-11-23 21:28:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:58,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:58,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:58,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048163372] [2023-11-23 21:28:58,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:28:58,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:58,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:58,350 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:58,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:28:58,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:28:58,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:28:58,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:28:58,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:58,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:28:58,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:58,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211672749] [2023-11-23 21:28:58,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:58,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048163372] [2023-11-23 21:28:58,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048163372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:58,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1930543411] [2023-11-23 21:28:58,550 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:28:58,550 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:28:58,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:28:58,551 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:28:58,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:28:59,223 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:28:59,225 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:29:00,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '982#(and (<= (+ 3 ~ARR_SIZE~0) (* 3 |ULTIMATE.start_main_~sum~0#1|)) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-23 21:29:00,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:29:00,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:29:00,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-23 21:29:00,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451585434] [2023-11-23 21:29:00,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:00,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:29:00,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:00,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:29:00,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:29:00,078 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:29:00,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:00,207 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2023-11-23 21:29:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:29:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-23 21:29:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:00,212 INFO L225 Difference]: With dead ends: 42 [2023-11-23 21:29:00,212 INFO L226 Difference]: Without dead ends: 39 [2023-11-23 21:29:00,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:29:00,214 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:00,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 51 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:00,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-23 21:29:00,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2023-11-23 21:29:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:29:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-23 21:29:00,232 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 19 [2023-11-23 21:29:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:00,232 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-23 21:29:00,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:29:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-23 21:29:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:29:00,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:00,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:00,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:00,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:00,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:00,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1874118622, now seen corresponding path program 4 times [2023-11-23 21:29:00,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:00,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090136656] [2023-11-23 21:29:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:00,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:00,473 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:29:00,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458417792] [2023-11-23 21:29:00,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:29:00,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:00,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:00,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:00,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:29:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:00,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-23 21:29:00,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:00,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:29:00,638 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 [2023-11-23 21:29:00,704 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 [2023-11-23 21:29:01,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:01,564 INFO L349 Elim1Store]: treesize reduction 433, result has 19.4 percent of original size [2023-11-23 21:29:01,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 142 treesize of output 156 [2023-11-23 21:29:02,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 37 [2023-11-23 21:29:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:02,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:05,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:05,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090136656] [2023-11-23 21:29:05,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:29:05,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458417792] [2023-11-23 21:29:05,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458417792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:05,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641299925] [2023-11-23 21:29:05,483 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:29:05,483 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:05,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:05,484 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:05,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:29:05,916 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:29:05,918 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:29:07,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1222#(and (<= |ULTIMATE.start_main_~index~0#1| 32767) (<= (+ 3 ~ARR_SIZE~0) (* 3 |ULTIMATE.start_main_~sum~0#1|)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-23 21:29:07,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:29:07,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:29:07,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-23 21:29:07,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907301869] [2023-11-23 21:29:07,916 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:07,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:29:07,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:29:07,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 21:29:07,918 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:29:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:10,403 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2023-11-23 21:29:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:29:10,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-23 21:29:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:10,405 INFO L225 Difference]: With dead ends: 59 [2023-11-23 21:29:10,405 INFO L226 Difference]: Without dead ends: 56 [2023-11-23 21:29:10,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=183, Invalid=1222, Unknown=1, NotChecked=0, Total=1406 [2023-11-23 21:29:10,407 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:10,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 74 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:29:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-23 21:29:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2023-11-23 21:29:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:29:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2023-11-23 21:29:10,454 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 20 [2023-11-23 21:29:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:10,454 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2023-11-23 21:29:10,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:29:10,454 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2023-11-23 21:29:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:29:10,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:10,456 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:10,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:10,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:10,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:10,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:10,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2032216586, now seen corresponding path program 5 times [2023-11-23 21:29:10,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:10,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816425169] [2023-11-23 21:29:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:10,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:10,703 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:29:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424113524] [2023-11-23 21:29:10,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:29:10,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:10,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:10,718 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:10,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:29:10,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:29:10,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:29:10,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:29:10,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:10,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:10,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:10,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816425169] [2023-11-23 21:29:10,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:29:10,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424113524] [2023-11-23 21:29:10,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424113524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:10,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2031928836] [2023-11-23 21:29:10,947 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:29:10,948 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:10,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:10,948 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:10,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:29:11,654 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:29:11,655 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:29:12,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1531#(and (<= |ULTIMATE.start_main_~index~0#1| 32767) (<= (+ 3 ~ARR_SIZE~0) (* 3 |ULTIMATE.start_main_~sum~0#1|)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-23 21:29:12,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:29:12,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:29:12,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-23 21:29:12,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339114059] [2023-11-23 21:29:12,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:12,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:29:12,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:12,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:29:12,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:29:12,592 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:29:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:12,794 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2023-11-23 21:29:12,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:29:12,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-23 21:29:12,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:12,796 INFO L225 Difference]: With dead ends: 71 [2023-11-23 21:29:12,796 INFO L226 Difference]: Without dead ends: 63 [2023-11-23 21:29:12,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2023-11-23 21:29:12,798 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:12,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 63 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-23 21:29:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2023-11-23 21:29:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:29:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-11-23 21:29:12,828 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 21 [2023-11-23 21:29:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:12,828 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-11-23 21:29:12,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:29:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-11-23 21:29:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:29:12,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:12,830 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:12,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-23 21:29:13,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:13,051 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:13,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1042176619, now seen corresponding path program 6 times [2023-11-23 21:29:13,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:13,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585399466] [2023-11-23 21:29:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:13,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:13,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:29:13,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168674262] [2023-11-23 21:29:13,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:29:13,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:13,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:13,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:13,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:29:13,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:29:13,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:29:13,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:29:13,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:13,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:13,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:13,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585399466] [2023-11-23 21:29:13,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:29:13,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168674262] [2023-11-23 21:29:13,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168674262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:13,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906862979] [2023-11-23 21:29:13,312 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:29:13,313 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:13,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:13,313 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:13,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:29:13,806 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:29:13,808 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:29:14,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1870#(and (<= |ULTIMATE.start_main_~index~0#1| 32767) (<= (+ 3 ~ARR_SIZE~0) (* 3 |ULTIMATE.start_main_~sum~0#1|)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-23 21:29:14,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:29:14,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:29:14,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-23 21:29:14,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218833350] [2023-11-23 21:29:14,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:14,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:29:14,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:14,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:29:14,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:29:14,861 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:29:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:15,088 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2023-11-23 21:29:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:29:15,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-23 21:29:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:15,091 INFO L225 Difference]: With dead ends: 63 [2023-11-23 21:29:15,091 INFO L226 Difference]: Without dead ends: 60 [2023-11-23 21:29:15,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2023-11-23 21:29:15,095 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:15,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 63 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-23 21:29:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2023-11-23 21:29:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 21:29:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2023-11-23 21:29:15,147 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 21 [2023-11-23 21:29:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:15,147 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2023-11-23 21:29:15,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:29:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2023-11-23 21:29:15,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:29:15,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:15,150 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:15,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 21:29:15,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:15,351 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:15,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:15,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2052614903, now seen corresponding path program 7 times [2023-11-23 21:29:15,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:15,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020585646] [2023-11-23 21:29:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:15,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:15,375 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:29:15,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384883350] [2023-11-23 21:29:15,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:29:15,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:15,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:15,378 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:15,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:29:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:15,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-23 21:29:15,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:15,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:29:15,584 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 [2023-11-23 21:29:15,640 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 [2023-11-23 21:29:15,739 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 [2023-11-23 21:29:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:16,901 INFO L349 Elim1Store]: treesize reduction 594, result has 20.9 percent of original size [2023-11-23 21:29:16,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 5 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 57 case distinctions, treesize of input 170 treesize of output 242 [2023-11-23 21:29:19,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:29:19,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 4 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 19 case distinctions, treesize of input 257 treesize of output 281 [2023-11-23 21:29:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:22,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:23,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:23,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020585646] [2023-11-23 21:29:23,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:29:23,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384883350] [2023-11-23 21:29:23,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384883350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:23,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1813371526] [2023-11-23 21:29:23,427 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:29:23,428 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:23,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:23,428 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:23,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:29:23,829 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:29:23,835 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:29:25,100 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2182#(and (<= |ULTIMATE.start_main_~index~0#1| 32767) (<= (+ 3 ~ARR_SIZE~0) (* 3 |ULTIMATE.start_main_~sum~0#1|)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-23 21:29:25,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:29:25,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:29:25,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-23 21:29:25,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957480326] [2023-11-23 21:29:25,101 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:25,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:29:25,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:25,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:29:25,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 21:29:25,103 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:29:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:26,055 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2023-11-23 21:29:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 21:29:26,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-11-23 21:29:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:26,060 INFO L225 Difference]: With dead ends: 69 [2023-11-23 21:29:26,060 INFO L226 Difference]: Without dead ends: 66 [2023-11-23 21:29:26,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:29:26,062 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:26,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 118 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:29:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-23 21:29:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2023-11-23 21:29:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-23 21:29:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-11-23 21:29:26,102 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 22 [2023-11-23 21:29:26,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:26,103 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-11-23 21:29:26,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:29:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-11-23 21:29:26,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:29:26,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:26,105 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:26,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:26,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:26,319 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:26,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1804435857, now seen corresponding path program 1 times [2023-11-23 21:29:26,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:26,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408195779] [2023-11-23 21:29:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:26,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:26,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:29:26,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717422323] [2023-11-23 21:29:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:26,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:26,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:26,340 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:26,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2722ec26-e13e-4df4-87a9-ae4b93d103d5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:29:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:26,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-23 21:29:26,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:26,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:29:26,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-23 21:29:26,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:29:26,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 14 [2023-11-23 21:29:26,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 21:29:26,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:29:26,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:26,810 INFO L349 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2023-11-23 21:29:26,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 80 [2023-11-23 21:29:26,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:29:27,174 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 21:29:27,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-23 21:29:31,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:34,113 INFO L349 Elim1Store]: treesize reduction 1215, result has 17.4 percent of original size [2023-11-23 21:29:34,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 1 disjoint index pairs (out of 136 index pairs), introduced 18 new quantified variables, introduced 150 case distinctions, treesize of input 848 treesize of output 966 [2023-11-23 21:29:34,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 224 [2023-11-23 21:29:34,274 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 21:29:34,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 241 [2023-11-23 21:29:34,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 205 [2023-11-23 21:29:34,398 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 197 treesize of output 195 [2023-11-23 21:29:34,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 196 [2023-11-23 21:29:34,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 189 [2023-11-23 21:29:34,874 INFO L224 Elim1Store]: Index analysis took 231 ms [2023-11-23 21:29:36,250 INFO L349 Elim1Store]: treesize reduction 1365, result has 5.3 percent of original size [2023-11-23 21:29:36,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 1 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 150 case distinctions, treesize of input 379 treesize of output 388 [2023-11-23 21:29:36,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 178 [2023-11-23 21:29:36,494 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 21:29:36,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 195 [2023-11-23 21:29:36,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 159 [2023-11-23 21:29:36,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 152 [2023-11-23 21:29:36,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 145 [2023-11-23 21:29:36,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 138 [2023-11-23 21:29:37,060 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 130 treesize of output 128