./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5 --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 2b375ae29a973823eea93f22f40d893acb563fa864c4860e04525925a120d938 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:54:48,941 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:54:49,026 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:54:49,032 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:54:49,033 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:54:49,065 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:54:49,066 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:54:49,067 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:54:49,068 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:54:49,069 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:54:49,070 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:54:49,070 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:54:49,071 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:54:49,072 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:54:49,073 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:54:49,073 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:54:49,074 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:54:49,075 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:54:49,076 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:54:49,076 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:54:49,077 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:54:49,083 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:54:49,084 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:54:49,085 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:54:49,085 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:54:49,086 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:54:49,086 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:54:49,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:54:49,088 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:54:49,088 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:54:49,089 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:54:49,089 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:54:49,090 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:54:49,091 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:54:49,091 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:54:49,092 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:54:49,092 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:54:49,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:54:49,094 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:54:49,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:54:49,096 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:54:49,097 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:54:49,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:54:49,098 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:54:49,099 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:54:49,100 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:54:49,100 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:54:49,101 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_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b375ae29a973823eea93f22f40d893acb563fa864c4860e04525925a120d938 [2023-11-21 19:54:49,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:54:49,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:54:49,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:54:49,478 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:54:49,479 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:54:49,481 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c [2023-11-21 19:54:52,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:54:53,102 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:54:53,103 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c [2023-11-21 19:54:53,112 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/data/d98eeef9d/a28b3ada50b34064aaf7282498e9523f/FLAG9bb1e39b4 [2023-11-21 19:54:53,130 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/data/d98eeef9d/a28b3ada50b34064aaf7282498e9523f [2023-11-21 19:54:53,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:54:53,136 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:54:53,139 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:54:53,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:54:53,146 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:54:53,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad8090a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53, skipping insertion in model container [2023-11-21 19:54:53,150 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,190 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:54:53,441 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_6ba9c760-89a6-4a09-9184-47c648931a5a/sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c[987,1000] [2023-11-21 19:54:53,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:54:53,508 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:54:53,530 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_6ba9c760-89a6-4a09-9184-47c648931a5a/sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c[987,1000] [2023-11-21 19:54:53,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:54:53,597 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:54:53,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53 WrapperNode [2023-11-21 19:54:53,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:54:53,600 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:54:53,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:54:53,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:54:53,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,675 INFO L138 Inliner]: procedures = 16, calls = 83, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2023-11-21 19:54:53,676 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:54:53,677 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:54:53,677 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:54:53,678 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:54:53,690 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,710 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,712 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,733 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,735 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,737 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,752 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:54:53,753 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:54:53,754 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:54:53,754 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:54:53,755 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (1/1) ... [2023-11-21 19:54:53,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:54:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:53,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:54:53,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:54:53,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:54:53,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:54:53,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:54:53,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:54:53,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:54:53,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:54:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:54:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 19:54:53,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 19:54:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_35_0 [2023-11-21 19:54:53,859 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_35_0 [2023-11-21 19:54:53,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:54:53,966 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:54:53,969 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:54:54,341 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:54:54,419 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:54:54,419 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:54:54,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:54:54 BoogieIcfgContainer [2023-11-21 19:54:54,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:54:54,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:54:54,425 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:54:54,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:54:54,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:54:53" (1/3) ... [2023-11-21 19:54:54,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae262cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:54:54, skipping insertion in model container [2023-11-21 19:54:54,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:54:53" (2/3) ... [2023-11-21 19:54:54,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae262cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:54:54, skipping insertion in model container [2023-11-21 19:54:54,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:54:54" (3/3) ... [2023-11-21 19:54:54,433 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps6-ll.c [2023-11-21 19:54:54,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:54:54,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:54:54,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:54:54,583 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;@28862850, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:54:54,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:54:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 19:54:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 19:54:54,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:54,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:54,604 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:54,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1855799543, now seen corresponding path program 1 times [2023-11-21 19:54:54,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:54,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124576138] [2023-11-21 19:54:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:54,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:54,910 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:54:54,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183029276] [2023-11-21 19:54:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:54,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:54,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:54,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:54,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:54:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:55,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-21 19:54:55,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:55,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:55,349 INFO L349 Elim1Store]: treesize reduction 40, result has 35.5 percent of original size [2023-11-21 19:54:55,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 45 [2023-11-21 19:54:55,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:55,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:55,404 INFO L349 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2023-11-21 19:54:55,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2023-11-21 19:54:55,440 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-21 19:54:55,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 109 [2023-11-21 19:54:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:54:55,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:54:55,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:55,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124576138] [2023-11-21 19:54:55,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:54:55,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183029276] [2023-11-21 19:54:55,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183029276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:54:55,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:54:55,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 19:54:55,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187242706] [2023-11-21 19:54:55,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:54:55,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:54:55,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:54:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:54:55,806 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:54:56,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:56,267 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2023-11-21 19:54:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:54:56,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 19:54:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:56,282 INFO L225 Difference]: With dead ends: 58 [2023-11-21 19:54:56,282 INFO L226 Difference]: Without dead ends: 35 [2023-11-21 19:54:56,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:54:56,297 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:56,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 74 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:54:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-21 19:54:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-11-21 19:54:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-21 19:54:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-21 19:54:56,366 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2023-11-21 19:54:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:56,368 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-21 19:54:56,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:54:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-21 19:54:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 19:54:56,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:56,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:56,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:56,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 19:54:56,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:56,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:56,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1392350713, now seen corresponding path program 1 times [2023-11-21 19:54:56,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:56,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170808229] [2023-11-21 19:54:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:56,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:56,675 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:54:56,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923980331] [2023-11-21 19:54:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:56,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:56,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:56,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:56,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:54:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:58,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 104 conjunts are in the unsatisfiable core [2023-11-21 19:54:58,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:59,075 INFO L349 Elim1Store]: treesize reduction 53, result has 41.1 percent of original size [2023-11-21 19:54:59,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 63 [2023-11-21 19:54:59,120 INFO L349 Elim1Store]: treesize reduction 52, result has 25.7 percent of original size [2023-11-21 19:54:59,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 78 [2023-11-21 19:54:59,156 INFO L349 Elim1Store]: treesize reduction 40, result has 16.7 percent of original size [2023-11-21 19:54:59,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 34 [2023-11-21 19:54:59,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 19:54:59,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 19:54:59,203 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 37 treesize of output 36 [2023-11-21 19:54:59,256 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 21 treesize of output 19 [2023-11-21 19:54:59,283 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-21 19:54:59,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-11-21 19:54:59,305 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-21 19:54:59,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 23 [2023-11-21 19:54:59,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-21 19:54:59,333 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 53 treesize of output 49 [2023-11-21 19:54:59,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2023-11-21 19:54:59,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 58 [2023-11-21 19:54:59,386 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 101 treesize of output 95 [2023-11-21 19:54:59,394 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-21 19:54:59,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:59,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:59,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:59,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 60 [2023-11-21 19:54:59,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:59,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:59,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:59,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2023-11-21 19:54:59,467 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 136 treesize of output 129 [2023-11-21 19:54:59,491 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-21 19:54:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:59,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:59,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:54:59,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 61 [2023-11-21 19:55:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:55:00,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:55:02,500 WARN L854 $PredicateComparison]: unable to prove that (forall ((func_to_recursive_line_27_to_35_0_~c.offset Int)) (let ((.cse6 (store |c_#memory_int| c_func_to_recursive_line_27_to_35_0_~c.base (let ((.cse8 (select |c_#memory_int| c_func_to_recursive_line_27_to_35_0_~c.base))) (store .cse8 func_to_recursive_line_27_to_35_0_~c.offset (+ (select .cse8 func_to_recursive_line_27_to_35_0_~c.offset) 1)))))) (let ((.cse7 (select .cse6 c_func_to_recursive_line_27_to_35_0_~y.base))) (let ((.cse0 (select .cse7 c_func_to_recursive_line_27_to_35_0_~y.offset))) (let ((.cse5 (+ .cse0 1))) (let ((.cse3 (store .cse6 c_func_to_recursive_line_27_to_35_0_~y.base (store .cse7 c_func_to_recursive_line_27_to_35_0_~y.offset .cse5)))) (let ((.cse4 (select .cse3 c_func_to_recursive_line_27_to_35_0_~x.base))) (let ((.cse1 (select .cse4 c_func_to_recursive_line_27_to_35_0_~x.offset))) (let ((.cse2 (select (select (store .cse3 c_func_to_recursive_line_27_to_35_0_~x.base (store .cse4 c_func_to_recursive_line_27_to_35_0_~x.offset (+ (* .cse5 (* .cse5 (* .cse5 (* .cse5 .cse5)))) .cse1))) c_func_to_recursive_line_27_to_35_0_~y.base) c_func_to_recursive_line_27_to_35_0_~y.offset))) (= (+ (* (* .cse0 .cse0 .cse0) 120) (* 12 .cse1) (* (* .cse0 .cse0 .cse0 .cse0 .cse0) 12) (* 120 (* .cse0 .cse0)) (* .cse2 .cse2) 12 (* (* .cse0 .cse0 .cse0 .cse0) 60) (* .cse0 60)) (+ (* 2 (* .cse2 .cse2 .cse2 .cse2 .cse2 .cse2)) (* (* .cse2 .cse2 .cse2 .cse2 .cse2) 6) (* 5 (* .cse2 .cse2 .cse2 .cse2))))))))))))) is different from false [2023-11-21 19:55:02,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:55:02,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170808229] [2023-11-21 19:55:02,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:55:02,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923980331] [2023-11-21 19:55:02,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923980331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:55:02,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900459959] [2023-11-21 19:55:02,685 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-21 19:55:02,685 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:55:02,689 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-21 19:55:02,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:55:02,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-21 19:55:02,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546044696] [2023-11-21 19:55:02,692 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 19:55:02,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 19:55:02,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:55:02,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 19:55:02,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=202, Unknown=1, NotChecked=28, Total=272 [2023-11-21 19:55:02,694 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:55:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:55:03,503 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-11-21 19:55:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 19:55:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-21 19:55:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:55:03,508 INFO L225 Difference]: With dead ends: 57 [2023-11-21 19:55:03,508 INFO L226 Difference]: Without dead ends: 55 [2023-11-21 19:55:03,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=69, Invalid=314, Unknown=1, NotChecked=36, Total=420 [2023-11-21 19:55:03,511 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:55:03,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 111 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:55:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-21 19:55:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-11-21 19:55:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-21 19:55:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-11-21 19:55:03,568 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 18 [2023-11-21 19:55:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:55:03,569 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-11-21 19:55:03,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:55:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-11-21 19:55:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 19:55:03,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:55:03,572 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:55:03,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-21 19:55:03,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:55:03,779 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:55:03,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:55:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash 689571631, now seen corresponding path program 1 times [2023-11-21 19:55:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:55:03,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803239814] [2023-11-21 19:55:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:55:03,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:55:03,842 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:55:03,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873625553] [2023-11-21 19:55:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:55:03,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:55:03,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:55:03,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:55:03,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:55:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:55:03,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-21 19:55:03,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:55:03,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:55:04,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:55:04,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:55:04,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:55:04,275 INFO L349 Elim1Store]: treesize reduction 188, result has 24.5 percent of original size [2023-11-21 19:55:04,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 130 treesize of output 333 [2023-11-21 19:55:04,324 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-21 19:55:04,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 73 [2023-11-21 19:55:04,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-21 19:55:04,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-21 19:55:04,772 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 50 [2023-11-21 19:55:04,839 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 50 [2023-11-21 19:55:04,912 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 50 [2023-11-21 19:55:06,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:55:06,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:55:06,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:55:06,526 INFO L349 Elim1Store]: treesize reduction 111, result has 24.5 percent of original size [2023-11-21 19:55:06,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 2740 treesize of output 2575 [2023-11-21 19:55:07,204 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-21 19:55:07,208 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 2 case distinctions, treesize of input 21 treesize of output 11 [2023-11-21 19:55:07,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-21 19:55:07,280 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-21 19:55:07,281 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 2 case distinctions, treesize of input 17 treesize of output 9 [2023-11-21 19:55:07,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 19:55:08,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:55:09,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 19:55:09,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 44 case distinctions, treesize of input 3733 treesize of output 3533 [2023-11-21 19:55:09,347 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 551 treesize of output 549 [2023-11-21 19:55:09,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 19:55:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:55:11,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:55:11,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:55:11,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803239814] [2023-11-21 19:55:11,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:55:11,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873625553] [2023-11-21 19:55:11,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873625553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:55:11,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:55:11,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 19:55:11,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874474731] [2023-11-21 19:55:11,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:55:11,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:55:11,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:55:11,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:55:11,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:55:11,813 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 19:55:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:55:12,410 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-11-21 19:55:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:55:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-21 19:55:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:55:12,413 INFO L225 Difference]: With dead ends: 61 [2023-11-21 19:55:12,413 INFO L226 Difference]: Without dead ends: 57 [2023-11-21 19:55:12,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-21 19:55:12,415 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:55:12,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 3 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:55:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-21 19:55:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-21 19:55:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-21 19:55:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-11-21 19:55:12,435 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 18 [2023-11-21 19:55:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:55:12,435 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-11-21 19:55:12,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 19:55:12,436 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-11-21 19:55:12,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 19:55:12,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:55:12,437 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:55:12,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-21 19:55:12,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:55:12,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:55:12,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:55:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -770109392, now seen corresponding path program 1 times [2023-11-21 19:55:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:55:12,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427875054] [2023-11-21 19:55:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:55:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:55:12,698 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:55:12,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898484995] [2023-11-21 19:55:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:55:12,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:55:12,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:55:12,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:55:12,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ba9c760-89a6-4a09-9184-47c648931a5a/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:55:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:55:12,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-21 19:55:12,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:55:12,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:55:12,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:55:12,913 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-11-21 19:55:12,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 114 [2023-11-21 19:55:12,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 19:55:12,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:55:12,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 62 [2023-11-21 19:55:13,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 19:55:13,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 19:55:13,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-21 19:55:13,111 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 19:55:13,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 38 [2023-11-21 19:55:13,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 19:55:14,604 WARN L876 $PredicateComparison]: unable to prove that (and (let ((.cse0 (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) 0))) (or (and .cse0 (= |c_ULTIMATE.start_main_~#y~0#1.base| |c_ULTIMATE.start_main_~#k~0#1.base|)) (and (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#k~0#1.base|))) (or (exists ((v_DerPreprocessor_53 (Array Int Int)) (v_DerPreprocessor_54 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int)) (let ((.cse1 (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#y~0#1.base| v_DerPreprocessor_53) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_54) |c_ULTIMATE.start_main_~#k~0#1.base| .cse2))) (and (= (select (select .cse1 |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) 0) (not (= |ULTIMATE.start_main_~#x~0#1.base| |c_ULTIMATE.start_main_~#k~0#1.base|)) (= (select .cse1 |ULTIMATE.start_main_~#x~0#1.base|) (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#y~0#1.base| |ULTIMATE.start_main_~#x~0#1.base|))))) (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int) (v_DerPreprocessor_53 (Array Int Int)) (v_DerPreprocessor_54 (Array Int Int))) (let ((.cse3 (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#y~0#1.base| v_DerPreprocessor_53) |c_ULTIMATE.start_main_~#k~0#1.base| v_DerPreprocessor_54) |ULTIMATE.start_main_~#c~0#1.base| (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|)))) (and (= (select (select .cse3 |c_ULTIMATE.start_main_~#y~0#1.base|) |c_ULTIMATE.start_main_~#y~0#1.offset|) 0) (not (= |ULTIMATE.start_main_~#c~0#1.base| |c_ULTIMATE.start_main_~#k~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#y~0#1.base| |ULTIMATE.start_main_~#c~0#1.base|)) (= .cse2 (select .cse3 |c_ULTIMATE.start_main_~#k~0#1.base|))))) (exists ((|ULTIMATE.start_main_~#x~0#1.base| Int)) (and (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int)) (and (exists ((v_DerPreprocessor_52 (Array Int Int)) (v_DerPreprocessor_53 (Array Int Int)) (v_DerPreprocessor_54 (Array Int Int))) (let ((.cse5 (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#k~0#1.base| v_DerPreprocessor_52) |c_ULTIMATE.start_main_~#y~0#1.base| v_DerPreprocessor_53) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_54) |ULTIMATE.start_main_~#c~0#1.base| (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|)))) (let ((.cse4 (select .cse5 |c_ULTIMATE.start_main_~#k~0#1.base|))) (and (= v_DerPreprocessor_52 .cse4) (= .cse2 .cse4) (= (store .cse2 |c_ULTIMATE.start_main_~#y~0#1.offset| 0) (select .cse5 |c_ULTIMATE.start_main_~#y~0#1.base|)) (= (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (select .cse5 |ULTIMATE.start_main_~#x~0#1.base|)))))) (not (= |c_ULTIMATE.start_main_~#y~0#1.base| |ULTIMATE.start_main_~#c~0#1.base|)) (not (= |ULTIMATE.start_main_~#c~0#1.base| |ULTIMATE.start_main_~#x~0#1.base|)))) (not (= |c_ULTIMATE.start_main_~#y~0#1.base| |ULTIMATE.start_main_~#x~0#1.base|)))))) .cse0))) (or (exists ((|v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5| Int)) (and (exists ((|v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2| Int) (v_DerPreprocessor_53 (Array Int Int)) (v_DerPreprocessor_54 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int)) (let ((.cse6 (store (store (store |c_#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5| v_DerPreprocessor_53) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_54) |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2| (select |c_#memory_int| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2|)))) (and (= (select (select .cse6 |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_5|) 0) (not (= |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5| |ULTIMATE.start_main_~#x~0#1.base|)) (not (= |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2| |ULTIMATE.start_main_~#x~0#1.base|)) (= (select .cse6 |ULTIMATE.start_main_~#x~0#1.base|) (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|))))) (= (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_5|) 0))) (exists ((|v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_5| Int)) (= (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_5|) 0)) (exists ((|v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5| Int)) (and (= (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_5|) 0) (exists ((|v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2| Int) (|ULTIMATE.start_main_~#x~0#1.base| Int)) (and (not (= |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5| |ULTIMATE.start_main_~#x~0#1.base|)) (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int)) (and (not (= |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5| |ULTIMATE.start_main_~#c~0#1.base|)) (not (= |ULTIMATE.start_main_~#c~0#1.base| |ULTIMATE.start_main_~#x~0#1.base|)) (exists ((v_DerPreprocessor_52 (Array Int Int)) (v_DerPreprocessor_53 (Array Int Int)) (v_DerPreprocessor_54 (Array Int Int))) (let ((.cse7 (store (store (store (store |c_#memory_int| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2| v_DerPreprocessor_52) |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5| v_DerPreprocessor_53) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_54) |ULTIMATE.start_main_~#c~0#1.base| (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|)))) (let ((.cse9 (select .cse7 |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2|)) (.cse8 (select |c_#memory_int| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2|))) (and (= (select .cse7 |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5|) (store .cse8 |v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_5| 0)) (= v_DerPreprocessor_52 .cse9) (= (select .cse7 |ULTIMATE.start_main_~#x~0#1.base|) (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|)) (= .cse9 .cse8))))))))))) (exists ((|v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5| Int)) (and (exists ((|v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2| Int) (|ULTIMATE.start_main_~#c~0#1.base| Int) (v_DerPreprocessor_53 (Array Int Int)) (v_DerPreprocessor_54 (Array Int Int))) (let ((.cse10 (store (store (store |c_#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5| v_DerPreprocessor_53) |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2| v_DerPreprocessor_54) |ULTIMATE.start_main_~#c~0#1.base| (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|)))) (and (= (select .cse10 |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2|) (select |c_#memory_int| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2|)) (not (= |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5| |ULTIMATE.start_main_~#c~0#1.base|)) (= (select (select .cse10 |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_5|) 0) (not (= |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_2| |ULTIMATE.start_main_~#c~0#1.base|))))) (= (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_main_~#y~0#1.offset_BEFORE_CALL_5|) 0))))) is different from true [2023-11-21 19:55:17,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 19:55:17,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 136 case distinctions, treesize of input 1493 treesize of output 2369 [2023-11-21 19:55:17,341 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 287 treesize of output 285 [2023-11-21 19:55:17,493 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 285 treesize of output 283 [2023-11-21 19:55:17,695 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 283 treesize of output 281 [2023-11-21 19:55:17,871 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 281 treesize of output 279 [2023-11-21 19:55:33,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 19:55:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:55:34,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:55:34,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:55:34,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427875054] [2023-11-21 19:55:34,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:55:34,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898484995] [2023-11-21 19:55:34,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898484995] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:55:34,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809109406] [2023-11-21 19:55:34,239 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-21 19:55:34,239 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:55:34,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:55:34,245 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:55:34,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:55:35,769 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_27_to_35_0 with input of size 106 for LOIs [2023-11-21 19:55:36,532 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-21 19:55:36,541 INFO L180 IcfgInterpreter]: Interpretation finished