./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:30:18,784 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:30:18,844 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:30:18,849 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:30:18,849 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:30:18,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:30:18,871 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:30:18,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:30:18,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:30:18,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:30:18,873 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:30:18,873 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:30:18,874 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:30:18,874 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:30:18,875 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:30:18,875 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:30:18,876 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:30:18,876 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:30:18,877 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:30:18,878 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:30:18,878 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:30:18,879 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:30:18,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:30:18,880 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:30:18,881 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:30:18,881 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:30:18,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:30:18,882 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:30:18,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:30:18,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:30:18,894 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:30:18,895 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:30:18,895 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:30:18,895 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:30:18,895 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:30:18,896 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:30:18,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:30:18,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:30:18,896 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:30:18,897 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:30:18,897 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:30:18,897 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:30:18,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:30:18,898 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:30:18,898 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:30:18,898 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:30:18,898 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:30:18,899 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_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 [2023-12-02 14:30:19,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:30:19,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:30:19,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:30:19,132 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:30:19,133 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:30:19,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2023-12-02 14:30:21,915 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:30:22,089 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:30:22,089 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2023-12-02 14:30:22,095 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/data/ab6057be6/865ce1ca26994b299286e724ccbd7b42/FLAGc6c99ab9b [2023-12-02 14:30:22,110 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/data/ab6057be6/865ce1ca26994b299286e724ccbd7b42 [2023-12-02 14:30:22,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:30:22,114 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:30:22,116 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:30:22,116 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:30:22,121 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:30:22,122 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87fa520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22, skipping insertion in model container [2023-12-02 14:30:22,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,150 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:30:22,297 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_e251de7c-399a-4c11-a966-d70f7364092d/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2023-12-02 14:30:22,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:30:22,322 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:30:22,335 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_e251de7c-399a-4c11-a966-d70f7364092d/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2023-12-02 14:30:22,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:30:22,362 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:30:22,362 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22 WrapperNode [2023-12-02 14:30:22,362 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:30:22,363 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:30:22,364 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:30:22,364 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:30:22,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,379 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,395 INFO L138 Inliner]: procedures = 16, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-12-02 14:30:22,395 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:30:22,396 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:30:22,396 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:30:22,396 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:30:22,405 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,408 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,414 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,416 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,417 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,419 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:30:22,422 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:30:22,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:30:22,423 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:30:22,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (1/1) ... [2023-12-02 14:30:22,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:30:22,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:22,454 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:30:22,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:30:22,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:30:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:30:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:30:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:30:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:30:22,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:30:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 14:30:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2023-12-02 14:30:22,482 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2023-12-02 14:30:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 14:30:22,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 14:30:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:30:22,549 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:30:22,551 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:30:22,730 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:30:22,758 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:30:22,759 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 14:30:22,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:30:22 BoogieIcfgContainer [2023-12-02 14:30:22,761 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:30:22,763 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:30:22,763 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:30:22,767 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:30:22,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:30:22" (1/3) ... [2023-12-02 14:30:22,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16092e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:30:22, skipping insertion in model container [2023-12-02 14:30:22,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:30:22" (2/3) ... [2023-12-02 14:30:22,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16092e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:30:22, skipping insertion in model container [2023-12-02 14:30:22,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:30:22" (3/3) ... [2023-12-02 14:30:22,770 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps4-ll.c [2023-12-02 14:30:22,788 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:30:22,788 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:30:22,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:30:22,832 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;@29d96c50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:30:22,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:30:22,836 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) [2023-12-02 14:30:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 14:30:22,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:22,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:30:22,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:22,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash -32795157, now seen corresponding path program 1 times [2023-12-02 14:30:22,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:22,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922670130] [2023-12-02 14:30:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:22,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:23,010 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:30:23,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91949519] [2023-12-02 14:30:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:23,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:23,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:23,015 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:23,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:30:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:23,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 14:30:23,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:23,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:23,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:23,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:23,468 INFO L349 Elim1Store]: treesize reduction 188, result has 24.5 percent of original size [2023-12-02 14:30:23,470 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 [2023-12-02 14:30:23,520 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 [2023-12-02 14:30:23,581 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 14:30:23,582 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 [2023-12-02 14:30:23,637 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 [2023-12-02 14:30:23,895 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 33 treesize of output 29 [2023-12-02 14:30:24,081 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 33 treesize of output 29 [2023-12-02 14:30:24,134 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 33 treesize of output 29 [2023-12-02 14:30:24,858 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:30:24,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:24,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:24,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:24,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:24,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:24,870 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:30:24,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:30:24,885 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:30:24,889 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 117 [2023-12-02 14:30:24,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:24,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:24,993 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:30:25,017 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-12-02 14:30:25,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 156 treesize of output 131 [2023-12-02 14:30:26,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:26,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:26,389 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:30:26,393 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 45 treesize of output 16 [2023-12-02 14:30:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:30:26,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:30:26,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922670130] [2023-12-02 14:30:26,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:30:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91949519] [2023-12-02 14:30:26,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91949519] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:30:26,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:30:26,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 14:30:26,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091079352] [2023-12-02 14:30:26,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:30:26,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:30:26,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:30:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:30:26,756 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) [2023-12-02 14:30:27,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:27,005 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2023-12-02 14:30:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:30:27,007 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 [2023-12-02 14:30:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:27,013 INFO L225 Difference]: With dead ends: 58 [2023-12-02 14:30:27,013 INFO L226 Difference]: Without dead ends: 35 [2023-12-02 14:30:27,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:30:27,019 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:27,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 74 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:30:27,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-02 14:30:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-12-02 14:30:27,050 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) [2023-12-02 14:30:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-12-02 14:30:27,052 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2023-12-02 14:30:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:27,053 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-12-02 14:30:27,053 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) [2023-12-02 14:30:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-12-02 14:30:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 14:30:27,055 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:27,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:30:27,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:30:27,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 14:30:27,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:27,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash -354243652, now seen corresponding path program 1 times [2023-12-02 14:30:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:27,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229392512] [2023-12-02 14:30:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:27,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:27,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:30:27,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799589214] [2023-12-02 14:30:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:27,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:27,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:27,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:27,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:30:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:27,426 WARN L260 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 137 conjunts are in the unsatisfiable core [2023-12-02 14:30:27,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:27,483 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-12-02 14:30:27,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 14:30:27,528 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-12-02 14:30:27,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 14:30:27,570 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-12-02 14:30:27,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 14:30:27,620 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-12-02 14:30:27,620 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 22 [2023-12-02 14:30:27,654 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-02 14:30:27,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 73 [2023-12-02 14:30:28,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:28,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:28,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:28,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 57 [2023-12-02 14:30:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:30:28,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:30:54,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:54,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229392512] [2023-12-02 14:30:54,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:30:54,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799589214] [2023-12-02 14:30:54,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799589214] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:54,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567881607] [2023-12-02 14:30:54,107 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 14:30:54,107 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:30:54,111 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) [2023-12-02 14:30:54,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:30:54,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-02 14:30:54,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008549770] [2023-12-02 14:30:54,113 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 14:30:54,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 14:30:54,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:30:54,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 14:30:54,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=431, Unknown=3, NotChecked=0, Total=506 [2023-12-02 14:30:54,116 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 15 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 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) [2023-12-02 14:30:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:30:57,411 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-12-02 14:30:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 14:30:57,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 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 [2023-12-02 14:30:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:30:57,414 INFO L225 Difference]: With dead ends: 57 [2023-12-02 14:30:57,414 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 14:30:57,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=153, Invalid=836, Unknown=3, NotChecked=0, Total=992 [2023-12-02 14:30:57,416 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:30:57,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 81 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:30:57,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 14:30:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-12-02 14:30:57,427 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) [2023-12-02 14:30:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-12-02 14:30:57,428 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 18 [2023-12-02 14:30:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:30:57,428 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-12-02 14:30:57,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 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) [2023-12-02 14:30:57,429 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-12-02 14:30:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 14:30:57,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:30:57,430 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:30:57,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:30:57,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:57,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:30:57,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:30:57,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1904549241, now seen corresponding path program 1 times [2023-12-02 14:30:57,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:30:57,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461633766] [2023-12-02 14:30:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:57,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:30:57,653 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:30:57,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153593942] [2023-12-02 14:30:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:30:57,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:30:57,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:30:57,654 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:30:57,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:30:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:30:57,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 14:30:57,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:30:57,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:57,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:57,797 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-12-02 14:30:57,798 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 [2023-12-02 14:30:57,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:57,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2023-12-02 14:30:57,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 14:30:57,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 14:30:57,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 14:30:57,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 14:30:58,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2023-12-02 14:30:58,035 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 [2023-12-02 14:30:58,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:30:58,050 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2023-12-02 14:30:58,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 65 [2023-12-02 14:30:58,054 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:30:58,055 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:30:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:30:58,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:30:58,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:30:58,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461633766] [2023-12-02 14:30:58,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:30:58,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153593942] [2023-12-02 14:30:58,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153593942] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:30:58,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1932487682] [2023-12-02 14:30:58,377 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 14:30:58,377 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:30:58,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:30:58,382 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:30:58,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:30:58,729 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_26_to_34_0 with input of size 106 for LOIs [2023-12-02 14:30:59,229 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 169 for LOIs [2023-12-02 14:30:59,597 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:31:05,683 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '539#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_#memory_int_31| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_31| 1) 1) 0) (= (select (select |v_#memory_int_31| 1) 0) 48))) (exists ((|v_#valid_23| (Array Int Int)) (|v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#c~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_5| Int) (|v_#length_11| (Array Int Int)) (|v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7| Int)) (and (= (store (store (store (store |v_#valid_23| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_4| 1) |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7| 1) |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_5| 1) |v_ULTIMATE.start_main_~#c~0#1.base_BEFORE_CALL_4| 1) |#valid|) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#c~0#1.base_BEFORE_CALL_4|) 0)) (<= (+ |#StackHeapBarrier| 1) |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_5|) (= (select |v_#length_11| 2) 9) (= |#length| (store (store (store (store |v_#length_11| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_4| 2) |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7| 8) |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_5| 8) |v_ULTIMATE.start_main_~#c~0#1.base_BEFORE_CALL_4| 8)) (<= (+ |#StackHeapBarrier| 1) |v_ULTIMATE.start_main_~#c~0#1.base_BEFORE_CALL_4|) (not (= (* (select (select |#memory_int| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0)) (* (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0)))) (= (select |v_#length_11| 3) 12) (= (select |v_#valid_23| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_4|) 0) (= (select |v_#valid_23| 1) 1) (= (select (store (store |v_#valid_23| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_4| 1) |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7| 1) |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_5|) 0) (<= (+ |#StackHeapBarrier| 1) |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_4|) (= (+ (* (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0)) (* (* (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0)) 2) (* (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0))) (* (select (select |#memory_int| |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_5|) 0) 4)) (= 0 (select (store (store (store |v_#valid_23| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_4| 1) |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7| 1) |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_5| 1) |v_ULTIMATE.start_main_~#c~0#1.base_BEFORE_CALL_4|)) (= (select (store |v_#valid_23| |v_ULTIMATE.start_main_~#k~0#1.base_BEFORE_CALL_4| 1) |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|) 0) (= (select |v_#valid_23| 0) 0) (= (select |v_#valid_23| 2) 1) (= 2 (select |v_#length_11| 1)) (= (select |v_#valid_23| 3) 1) (<= (+ |#StackHeapBarrier| 1) |v_ULTIMATE.start_main_~#y~0#1.base_BEFORE_CALL_7|))))' at error location [2023-12-02 14:31:05,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:31:05,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:31:05,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 14:31:05,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029131069] [2023-12-02 14:31:05,684 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 14:31:05,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:31:05,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:05,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:31:05,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=468, Unknown=4, NotChecked=0, Total=552 [2023-12-02 14:31:05,686 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 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) [2023-12-02 14:31:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:05,863 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-12-02 14:31:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:31:05,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 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 [2023-12-02 14:31:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:05,865 INFO L225 Difference]: With dead ends: 61 [2023-12-02 14:31:05,865 INFO L226 Difference]: Without dead ends: 57 [2023-12-02 14:31:05,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=116, Invalid=692, Unknown=4, NotChecked=0, Total=812 [2023-12-02 14:31:05,867 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:05,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 50 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:31:05,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-02 14:31:05,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-12-02 14:31:05,879 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) [2023-12-02 14:31:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-12-02 14:31:05,881 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 18 [2023-12-02 14:31:05,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:05,881 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-12-02 14:31:05,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 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) [2023-12-02 14:31:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-12-02 14:31:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 14:31:05,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:05,883 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] [2023-12-02 14:31:05,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 14:31:06,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:06,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:31:06,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash -956929769, now seen corresponding path program 1 times [2023-12-02 14:31:06,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:06,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744317420] [2023-12-02 14:31:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:06,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:06,104 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:31:06,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264084457] [2023-12-02 14:31:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:06,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:06,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:06,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:06,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:31:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:06,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 14:31:06,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:06,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,212 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 [2023-12-02 14:31:06,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,235 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 14:31:06,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 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 [2023-12-02 14:31:06,244 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 [2023-12-02 14:31:06,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,279 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 [2023-12-02 14:31:06,292 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 50 treesize of output 48 [2023-12-02 14:31:06,298 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 [2023-12-02 14:31:06,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,321 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 [2023-12-02 14:31:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,328 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 [2023-12-02 14:31:06,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,337 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 49 treesize of output 23 [2023-12-02 14:31:06,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 14:31:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 14:31:06,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 14:31:06,352 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 [2023-12-02 14:31:06,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:06,361 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-12-02 14:31:06,362 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 38 treesize of output 23 [2023-12-02 14:31:06,370 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 14:31:06,370 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 [2023-12-02 14:31:06,376 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 [2023-12-02 14:31:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:06,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:31:06,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:06,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744317420] [2023-12-02 14:31:06,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:31:06,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264084457] [2023-12-02 14:31:06,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264084457] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:31:06,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1823717552] [2023-12-02 14:31:06,623 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 14:31:06,623 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:31:06,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:31:06,623 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:31:06,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:31:07,149 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_26_to_34_0 with input of size 106 for LOIs [2023-12-02 14:31:07,614 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-12-02 14:31:07,617 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:31:11,356 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '815#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:31:11,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:31:11,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:31:11,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-02 14:31:11,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310970321] [2023-12-02 14:31:11,356 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 14:31:11,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 14:31:11,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:11,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 14:31:11,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2023-12-02 14:31:11,358 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:31:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:11,673 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2023-12-02 14:31:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 14:31:11,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-12-02 14:31:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:11,675 INFO L225 Difference]: With dead ends: 59 [2023-12-02 14:31:11,675 INFO L226 Difference]: Without dead ends: 45 [2023-12-02 14:31:11,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 14:31:11,677 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:11,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 56 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 118 Invalid, 2 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:31:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-02 14:31:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-12-02 14:31:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 14:31:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-12-02 14:31:11,685 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2023-12-02 14:31:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:11,685 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-12-02 14:31:11,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:31:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-12-02 14:31:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 14:31:11,686 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:11,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-12-02 14:31:11,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 14:31:11,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:11,887 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:31:11,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:11,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1213821005, now seen corresponding path program 2 times [2023-12-02 14:31:11,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:11,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041794907] [2023-12-02 14:31:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:11,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:11,908 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:31:11,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361997664] [2023-12-02 14:31:11,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:31:11,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:11,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:11,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:11,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:31:12,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 14:31:12,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:31:12,127 WARN L260 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 161 conjunts are in the unsatisfiable core [2023-12-02 14:31:12,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:12,146 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 [2023-12-02 14:31:12,155 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 14:31:12,172 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 14:31:12,173 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 [2023-12-02 14:31:12,186 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 14:31:12,212 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-12-02 14:31:12,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 14:31:12,225 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 50 treesize of output 48 [2023-12-02 14:31:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:12,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:12,250 INFO L349 Elim1Store]: treesize reduction 69, result has 1.4 percent of original size [2023-12-02 14:31:12,250 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 22 [2023-12-02 14:31:12,262 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 14:31:12,262 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 73 treesize of output 69 [2023-12-02 14:31:12,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:12,537 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 97 treesize of output 26 [2023-12-02 14:31:12,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:12,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:12,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:31:12,994 INFO L349 Elim1Store]: treesize reduction 170, result has 17.1 percent of original size [2023-12-02 14:31:12,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 149 treesize of output 87 [2023-12-02 14:31:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:13,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:31:18,020 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse7 (store |c_#memory_int| c_func_to_recursive_line_26_to_34_0_~c.base (let ((.cse9 (select |c_#memory_int| c_func_to_recursive_line_26_to_34_0_~c.base))) (store .cse9 c_func_to_recursive_line_26_to_34_0_~c.offset (+ (select .cse9 c_func_to_recursive_line_26_to_34_0_~c.offset) 1)))))) (let ((.cse8 (select .cse7 c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse5 (select .cse8 c_func_to_recursive_line_26_to_34_0_~y.offset))) (let ((.cse1 (store .cse7 c_func_to_recursive_line_26_to_34_0_~y.base (store .cse8 c_func_to_recursive_line_26_to_34_0_~y.offset (+ .cse5 1))))) (let ((.cse2 (select .cse1 c_func_to_recursive_line_26_to_34_0_~x.base))) (let ((.cse3 (* .cse5 .cse5)) (.cse4 (* .cse5 .cse5 .cse5)) (.cse6 (select .cse2 c_func_to_recursive_line_26_to_34_0_~x.offset))) (= (let ((.cse0 (select (select (store .cse1 c_func_to_recursive_line_26_to_34_0_~x.base (store .cse2 c_func_to_recursive_line_26_to_34_0_~x.offset (+ (* 3 .cse3) .cse4 (* .cse5 3) .cse6 1))) c_func_to_recursive_line_26_to_34_0_~y.base) c_func_to_recursive_line_26_to_34_0_~y.offset))) (+ (* .cse0 .cse0 .cse0 .cse0) (* (* .cse0 .cse0 .cse0) 2) (* .cse0 .cse0))) (+ (* .cse3 12) 4 (* .cse5 12) (* .cse4 4) (* .cse6 4))))))))) is different from true [2023-12-02 14:32:15,260 WARN L293 SmtUtils]: Spent 10.48s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:33:24,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:24,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041794907] [2023-12-02 14:33:24,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:33:24,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361997664] [2023-12-02 14:33:24,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361997664] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:33:24,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744611906] [2023-12-02 14:33:24,246 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 14:33:24,246 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:33:24,246 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) [2023-12-02 14:33:24,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:33:24,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-02 14:33:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480277445] [2023-12-02 14:33:24,247 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 14:33:24,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 14:33:24,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 14:33:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=698, Unknown=22, NotChecked=54, Total=870 [2023-12-02 14:33:24,248 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:33:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:33:35,964 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2023-12-02 14:33:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 14:33:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 14:33:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:33:35,965 INFO L225 Difference]: With dead ends: 71 [2023-12-02 14:33:35,965 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 14:33:35,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 116.3s TimeCoverageRelationStatistics Valid=186, Invalid=1200, Unknown=24, NotChecked=72, Total=1482 [2023-12-02 14:33:35,967 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:33:35,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 185 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:33:35,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 14:33:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2023-12-02 14:33:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 12 states have call successors, (12), 9 states have call predecessors, (12), 11 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2023-12-02 14:33:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2023-12-02 14:33:35,983 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 28 [2023-12-02 14:33:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:33:35,983 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2023-12-02 14:33:35,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:33:35,983 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2023-12-02 14:33:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 14:33:35,984 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:35,984 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:33:35,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 14:33:36,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:33:36,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:36,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:36,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2114078499, now seen corresponding path program 1 times [2023-12-02 14:33:36,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:33:36,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268799791] [2023-12-02 14:33:36,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:36,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:33:36,205 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:33:36,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104942551] [2023-12-02 14:33:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:36,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:33:36,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:33:36,206 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:33:36,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:33:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:36,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-02 14:33:36,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:33:36,372 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 14:33:36,373 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 31 treesize of output 27 [2023-12-02 14:33:36,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 22 [2023-12-02 14:33:36,404 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 14:33:38,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:33:38,696 INFO L349 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2023-12-02 14:33:38,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 85 [2023-12-02 14:33:38,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2023-12-02 14:33:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:33:38,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:33:43,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:43,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268799791] [2023-12-02 14:33:43,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:33:43,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104942551] [2023-12-02 14:33:43,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104942551] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:33:43,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [614565366] [2023-12-02 14:33:43,361 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 14:33:43,361 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:33:43,361 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) [2023-12-02 14:33:43,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:33:43,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-02 14:33:43,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080188125] [2023-12-02 14:33:43,362 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 14:33:43,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 14:33:43,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 14:33:43,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-12-02 14:33:43,363 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 14:33:45,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:33:45,103 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2023-12-02 14:33:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 14:33:45,104 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2023-12-02 14:33:45,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:33:45,105 INFO L225 Difference]: With dead ends: 75 [2023-12-02 14:33:45,105 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 14:33:45,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2023-12-02 14:33:45,107 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:33:45,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:33:45,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 14:33:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-12-02 14:33:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (17), 12 states have call predecessors, (17), 10 states have call successors, (17) [2023-12-02 14:33:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-12-02 14:33:45,125 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 30 [2023-12-02 14:33:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:33:45,125 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-12-02 14:33:45,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 14:33:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-12-02 14:33:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 14:33:45,127 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:45,127 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:33:45,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:33:45,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:33:45,328 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:45,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash -525408077, now seen corresponding path program 1 times [2023-12-02 14:33:45,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:33:45,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066617160] [2023-12-02 14:33:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:45,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:33:45,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:33:45,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440454913] [2023-12-02 14:33:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:45,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:33:45,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:33:45,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:33:45,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:33:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:45,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 99 conjunts are in the unsatisfiable core [2023-12-02 14:33:45,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:33:45,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:33:45,557 INFO L349 Elim1Store]: treesize reduction 30, result has 31.8 percent of original size [2023-12-02 14:33:45,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:33:45,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066617160] [2023-12-02 14:33:45,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:33:45,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440454913] [2023-12-02 14:33:45,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_int_51| input size 52 context size 52 output size 52 [2023-12-02 14:33:45,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1578775391] [2023-12-02 14:33:45,560 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 14:33:45,560 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:33:45,561 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) [2023-12-02 14:33:45,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:33:45,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2023-12-02 14:33:45,561 ERROR L171 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2023-12-02 14:33:45,561 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2023-12-02 14:33:45,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 14:33:45,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 14:33:45,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 14:33:45,771 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-12-02 14:33:45,773 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 14:33:45,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:33:45 BoogieIcfgContainer [2023-12-02 14:33:45,786 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 14:33:45,786 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 14:33:45,786 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 14:33:45,786 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 14:33:45,787 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:30:22" (3/4) ... [2023-12-02 14:33:45,788 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 14:33:45,789 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 14:33:45,789 INFO L158 Benchmark]: Toolchain (without parser) took 203675.15ms. Allocated memory was 138.4MB in the beginning and 205.5MB in the end (delta: 67.1MB). Free memory was 93.0MB in the beginning and 108.8MB in the end (delta: -15.8MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. [2023-12-02 14:33:45,789 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 138.4MB. Free memory is still 107.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:33:45,790 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.15ms. Allocated memory is still 138.4MB. Free memory was 93.0MB in the beginning and 81.6MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 14:33:45,790 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.87ms. Allocated memory is still 138.4MB. Free memory was 81.6MB in the beginning and 80.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:33:45,790 INFO L158 Benchmark]: Boogie Preprocessor took 25.76ms. Allocated memory is still 138.4MB. Free memory was 80.0MB in the beginning and 79.0MB in the end (delta: 943.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:33:45,790 INFO L158 Benchmark]: RCFGBuilder took 338.35ms. Allocated memory is still 138.4MB. Free memory was 79.0MB in the beginning and 63.9MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 14:33:45,790 INFO L158 Benchmark]: TraceAbstraction took 203022.64ms. Allocated memory was 138.4MB in the beginning and 205.5MB in the end (delta: 67.1MB). Free memory was 63.2MB in the beginning and 109.8MB in the end (delta: -46.6MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2023-12-02 14:33:45,791 INFO L158 Benchmark]: Witness Printer took 2.59ms. Allocated memory is still 205.5MB. Free memory was 109.8MB in the beginning and 108.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:33:45,792 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 138.4MB. Free memory is still 107.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 247.15ms. Allocated memory is still 138.4MB. Free memory was 93.0MB in the beginning and 81.6MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.87ms. Allocated memory is still 138.4MB. Free memory was 81.6MB in the beginning and 80.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.76ms. Allocated memory is still 138.4MB. Free memory was 80.0MB in the beginning and 79.0MB in the end (delta: 943.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 338.35ms. Allocated memory is still 138.4MB. Free memory was 79.0MB in the beginning and 63.9MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 203022.64ms. Allocated memory was 138.4MB in the beginning and 205.5MB in the end (delta: 67.1MB). Free memory was 63.2MB in the beginning and 109.8MB in the end (delta: -46.6MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. * Witness Printer took 2.59ms. Allocated memory is still 205.5MB. Free memory was 109.8MB in the beginning and 108.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 37]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L73] short k; [L74] long long y; [L75] long long x; [L76] long long c; [L77] k = __VERIFIER_nondet_short() [L78] y = 0 [L79] x = 0 [L80] c = 0 [L81] CALL func_to_recursive_line_26_to_34_0(&y, &c, &x, &k) [L52] EXPR \read(*x) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] CALL __VERIFIER_assert(((((4 * (*x)) - ((((*y) * (*y)) * (*y)) * (*y))) - (((2 * (*y)) * (*y)) * (*y))) - ((*y) * (*y))) == 0) [L33] COND FALSE !(!cond) [L52] RET __VERIFIER_assert(((((4 * (*x)) - ((((*y) * (*y)) * (*y)) * (*y))) - (((2 * (*y)) * (*y)) * (*y))) - ((*y) * (*y))) == 0) [L53] EXPR \read(*c) [L53] EXPR \read(*k) [L53] COND FALSE !(!((*c) < (*k))) [L60] EXPR \read(*c) [L60] *c = (*c) + 1 [L61] EXPR \read(*y) [L61] *y = (*y) + 1 [L62] EXPR \read(*y) [L62] EXPR \read(*y) [L62] EXPR \read(*y) [L62] EXPR \read(*x) [L62] *x = (((*y) * (*y)) * (*y)) + (*x) [L64] CALL func_to_recursive_line_26_to_34_0(y, c, x, k) [L52] EXPR \read(*x) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] EXPR \read(*y) [L52] CALL __VERIFIER_assert(((((4 * (*x)) - ((((*y) * (*y)) * (*y)) * (*y))) - (((2 * (*y)) * (*y)) * (*y))) - ((*y) * (*y))) == 0) [L33] COND FALSE !(!cond) [L52] RET __VERIFIER_assert(((((4 * (*x)) - ((((*y) * (*y)) * (*y)) * (*y))) - (((2 * (*y)) * (*y)) * (*y))) - ((*y) * (*y))) == 0) [L53] EXPR \read(*c) [L53] EXPR \read(*k) [L53] COND TRUE !((*c) < (*k)) [L64] RET func_to_recursive_line_26_to_34_0(y, c, x, k) [L81] RET func_to_recursive_line_26_to_34_0(&y, &c, &x, &k) [L82] EXPR \read(k) [L82] EXPR \read(y) [L82] EXPR \read(y) [L82] EXPR \read(y) [L82] CALL __VERIFIER_assert(((k * y) - (y * y)) == 0) [L33] COND FALSE !(!cond) [L82] RET __VERIFIER_assert(((k * y) - (y * y)) == 0) [L83] EXPR \read(x) [L83] EXPR \read(y) [L83] EXPR \read(y) [L83] EXPR \read(y) [L83] EXPR \read(y) [L83] EXPR \read(y) [L83] EXPR \read(y) [L83] EXPR \read(y) [L83] EXPR \read(y) [L83] EXPR \read(y) [L83] CALL __VERIFIER_assert(((((4 * x) - (((y * y) * y) * y)) - (((2 * y) * y) * y)) - (y * y)) == 0) [L33] COND TRUE !cond [L37] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 203.0s, OverallIterations: 7, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 17.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 156 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 152 mSDsluCounter, 492 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 420 mSDsCounter, 54 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1324 IncrementalHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 54 mSolverCounterUnsat, 72 mSDtfsCounter, 1324 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 259 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 165 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 158.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=6, InterpolantAutomatonStates: 85, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 170.5s InterpolantComputationTime, 162 NumberOfCodeBlocks, 162 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 120 ConstructedInterpolants, 33 QuantifiedInterpolants, 3332 SizeOfPredicates, 157 NumberOfNonLiveVariables, 1535 ConjunctsInSsa, 626 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 11/50 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-02 14:33:45,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:33:47,665 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:33:47,742 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 14:33:47,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:33:47,749 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:33:47,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:33:47,777 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:33:47,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:33:47,779 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:33:47,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:33:47,780 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:33:47,781 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:33:47,781 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:33:47,782 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:33:47,782 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:33:47,783 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:33:47,784 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:33:47,785 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:33:47,785 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:33:47,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:33:47,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:33:47,787 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:33:47,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:33:47,788 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:33:47,788 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:33:47,789 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 14:33:47,789 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 14:33:47,789 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:33:47,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:33:47,790 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:33:47,791 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:33:47,791 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 14:33:47,791 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:33:47,792 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:33:47,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:33:47,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:33:47,793 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:33:47,793 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:33:47,793 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 14:33:47,793 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 14:33:47,794 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:33:47,794 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:33:47,794 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:33:47,794 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:33:47,795 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 [2023-12-02 14:33:48,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:33:48,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:33:48,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:33:48,105 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:33:48,105 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:33:48,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2023-12-02 14:33:50,887 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:33:51,082 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:33:51,082 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2023-12-02 14:33:51,090 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/data/514299950/61964cd7afbb4e77b35fdea3f8d3b5c1/FLAGa2b3a0a2d [2023-12-02 14:33:51,102 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/data/514299950/61964cd7afbb4e77b35fdea3f8d3b5c1 [2023-12-02 14:33:51,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:33:51,105 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:33:51,107 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:33:51,107 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:33:51,113 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:33:51,113 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@645518c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51, skipping insertion in model container [2023-12-02 14:33:51,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,139 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:33:51,302 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_e251de7c-399a-4c11-a966-d70f7364092d/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2023-12-02 14:33:51,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:33:51,340 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:33:51,353 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_e251de7c-399a-4c11-a966-d70f7364092d/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2023-12-02 14:33:51,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:33:51,384 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:33:51,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51 WrapperNode [2023-12-02 14:33:51,385 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:33:51,386 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:33:51,386 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:33:51,387 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:33:51,395 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,406 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,428 INFO L138 Inliner]: procedures = 20, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2023-12-02 14:33:51,428 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:33:51,429 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:33:51,429 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:33:51,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:33:51,439 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,445 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,445 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,454 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,457 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,459 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,461 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,464 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:33:51,465 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:33:51,466 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:33:51,466 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:33:51,467 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (1/1) ... [2023-12-02 14:33:51,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:33:51,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:33:51,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:33:51,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:33:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:33:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 14:33:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:33:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2023-12-02 14:33:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2023-12-02 14:33:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:33:51,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:33:51,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2023-12-02 14:33:51,534 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2023-12-02 14:33:51,534 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2023-12-02 14:33:51,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 14:33:51,535 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 14:33:51,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2023-12-02 14:33:51,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:33:51,630 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:33:51,633 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:33:53,890 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:33:53,933 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:33:53,933 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 14:33:53,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:33:53 BoogieIcfgContainer [2023-12-02 14:33:53,934 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:33:53,951 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:33:53,951 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:33:53,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:33:53,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:33:51" (1/3) ... [2023-12-02 14:33:53,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e3a3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:33:53, skipping insertion in model container [2023-12-02 14:33:53,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:33:51" (2/3) ... [2023-12-02 14:33:53,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e3a3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:33:53, skipping insertion in model container [2023-12-02 14:33:53,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:33:53" (3/3) ... [2023-12-02 14:33:53,957 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps4-ll.c [2023-12-02 14:33:53,974 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:33:53,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:33:54,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:33:54,019 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;@4d6f75a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:33:54,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:33:54,023 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) [2023-12-02 14:33:54,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 14:33:54,028 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:33:54,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:33:54,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:33:54,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:33:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash -32795157, now seen corresponding path program 1 times [2023-12-02 14:33:54,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:33:54,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187136510] [2023-12-02 14:33:54,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:33:54,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:33:54,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:33:54,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:33:54,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 14:33:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:33:54,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 14:33:54,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:33:54,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:33:54,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:33:57,444 INFO L349 Elim1Store]: treesize reduction 397, result has 27.0 percent of original size [2023-12-02 14:33:57,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 524 treesize of output 623 [2023-12-02 14:33:57,700 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 54 treesize of output 50 [2023-12-02 14:33:58,038 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:33:58,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 24 [2023-12-02 14:34:01,469 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:01,521 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:01,538 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:01,539 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:01,606 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-12-02 14:34:01,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 61 [2023-12-02 14:34:02,285 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:02,377 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:02,414 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:02,414 INFO L224 Elim1Store]: Index analysis took 182 ms [2023-12-02 14:34:02,546 INFO L349 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2023-12-02 14:34:02,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 76 [2023-12-02 14:34:04,345 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:04,346 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:04,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1920 treesize of output 1842 [2023-12-02 14:34:06,293 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:06,293 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:06,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 9 [2023-12-02 14:34:08,046 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:08,047 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:08,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 58 treesize of output 158 [2023-12-02 14:34:08,141 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:08,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2023-12-02 14:34:13,010 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:13,010 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:13,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 47 treesize of output 140 [2023-12-02 14:34:13,127 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:13,128 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:13,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 69 treesize of output 169 [2023-12-02 14:34:13,721 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:13,721 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:13,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 47 treesize of output 140 [2023-12-02 14:34:13,809 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:13,810 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:13,811 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:13,812 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:13,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 69 treesize of output 133 [2023-12-02 14:34:14,034 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:14,035 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:14,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 47 treesize of output 140 [2023-12-02 14:34:14,092 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:14,093 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:14,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 69 treesize of output 169 [2023-12-02 14:34:14,348 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:14,348 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:14,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 47 treesize of output 140 [2023-12-02 14:34:14,400 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:14,401 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:14,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 69 treesize of output 169 [2023-12-02 14:34:16,320 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:16,321 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:16,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 82 treesize of output 187 [2023-12-02 14:34:16,669 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:16,670 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:16,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 82 treesize of output 187 [2023-12-02 14:34:17,586 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:17,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2023-12-02 14:34:17,910 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:17,916 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 56 [2023-12-02 14:34:17,925 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:17,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 23 [2023-12-02 14:34:17,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:17,963 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 131 treesize of output 97 [2023-12-02 14:34:18,004 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:18,004 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:18,008 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 14:34:18,064 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:18,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:18,086 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:18,111 INFO L349 Elim1Store]: treesize reduction 320, result has 0.3 percent of original size [2023-12-02 14:34:18,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 2627 treesize of output 2461 [2023-12-02 14:34:18,357 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:18,358 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:18,376 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 14:34:18,405 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:18,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:18,414 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:18,418 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 112 [2023-12-02 14:34:18,891 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:18,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:18,899 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:18,903 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 146 [2023-12-02 14:34:19,060 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:19,072 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,086 INFO L349 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2023-12-02 14:34:19,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1524 treesize of output 1422 [2023-12-02 14:34:19,173 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,173 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,177 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 14:34:19,217 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:19,224 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,228 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 80 [2023-12-02 14:34:19,248 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:19,258 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,268 INFO L349 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2023-12-02 14:34:19,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 602 treesize of output 560 [2023-12-02 14:34:19,324 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:19,332 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,336 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 103 [2023-12-02 14:34:19,388 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:19,395 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,399 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 143 [2023-12-02 14:34:19,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:19,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:19,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:19,469 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 128 treesize of output 88 [2023-12-02 14:34:19,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 23 [2023-12-02 14:34:19,551 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:19,559 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,563 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 120 [2023-12-02 14:34:19,606 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:34:19,613 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:34:19,617 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 111 [2023-12-02 14:34:19,889 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-12-02 14:34:19,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 20 [2023-12-02 14:34:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:34:20,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:34:20,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:34:20,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187136510] [2023-12-02 14:34:20,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187136510] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:34:20,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:34:20,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 14:34:20,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221901191] [2023-12-02 14:34:20,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:34:20,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:34:20,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:34:20,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:34:20,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:34:20,066 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) [2023-12-02 14:34:42,319 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-02 14:34:42,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-12-02 14:34:42,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:34:42,328 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 14:34:42,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 14:34:42,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:34:42,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:34:42,531 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPrecondition(IncrementalHoareTripleChecker.java:349) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) 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$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-02 14:34:42,534 INFO L158 Benchmark]: Toolchain (without parser) took 51428.89ms. Allocated memory was 111.1MB in the beginning and 195.0MB in the end (delta: 83.9MB). Free memory was 88.0MB in the beginning and 166.3MB in the end (delta: -78.3MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2023-12-02 14:34:42,535 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 65.0MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 69.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:34:42,535 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.47ms. Allocated memory is still 111.1MB. Free memory was 87.6MB in the beginning and 75.8MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 14:34:42,535 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.38ms. Allocated memory is still 111.1MB. Free memory was 75.8MB in the beginning and 74.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:34:42,536 INFO L158 Benchmark]: Boogie Preprocessor took 35.43ms. Allocated memory is still 111.1MB. Free memory was 74.0MB in the beginning and 72.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:34:42,536 INFO L158 Benchmark]: RCFGBuilder took 2468.55ms. Allocated memory is still 111.1MB. Free memory was 72.6MB in the beginning and 87.2MB in the end (delta: -14.6MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2023-12-02 14:34:42,536 INFO L158 Benchmark]: TraceAbstraction took 48582.87ms. Allocated memory was 111.1MB in the beginning and 195.0MB in the end (delta: 83.9MB). Free memory was 86.5MB in the beginning and 166.3MB in the end (delta: -79.8MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. [2023-12-02 14:34:42,539 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 65.0MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 69.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.47ms. Allocated memory is still 111.1MB. Free memory was 87.6MB in the beginning and 75.8MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.38ms. Allocated memory is still 111.1MB. Free memory was 75.8MB in the beginning and 74.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.43ms. Allocated memory is still 111.1MB. Free memory was 74.0MB in the beginning and 72.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2468.55ms. Allocated memory is still 111.1MB. Free memory was 72.6MB in the beginning and 87.2MB in the end (delta: -14.6MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * TraceAbstraction took 48582.87ms. Allocated memory was 111.1MB in the beginning and 195.0MB in the end (delta: 83.9MB). Free memory was 86.5MB in the beginning and 166.3MB in the end (delta: -79.8MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e251de7c-399a-4c11-a966-d70f7364092d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken