./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.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_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/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_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/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_919e0001-f667-4112-8d95-261633fc7963/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 d0e99b579c23cc22a276a70c2363ed9ed20405eb8e4be0ab38c77cda92397cf4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:23:38,808 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:23:38,873 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:23:38,877 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:23:38,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:23:38,901 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:23:38,902 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:23:38,902 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:23:38,903 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:23:38,903 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:23:38,904 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:23:38,904 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:23:38,905 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:23:38,905 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:23:38,906 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:23:38,906 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:23:38,907 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:23:38,907 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:23:38,908 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:23:38,908 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:23:38,909 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:23:38,911 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:23:38,912 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:23:38,913 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:23:38,913 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:23:38,913 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:23:38,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:23:38,914 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:23:38,914 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:23:38,915 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:23:38,915 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:23:38,915 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:23:38,916 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:23:38,916 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:23:38,916 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:23:38,916 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:23:38,916 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:23:38,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:23:38,917 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:23:38,917 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:23:38,917 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:23:38,917 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:23:38,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:23:38,918 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:23:38,918 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:23:38,918 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:23:38,918 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:23:38,918 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_919e0001-f667-4112-8d95-261633fc7963/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0e99b579c23cc22a276a70c2363ed9ed20405eb8e4be0ab38c77cda92397cf4 [2023-12-02 18:23:39,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:23:39,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:23:39,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:23:39,172 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:23:39,172 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:23:39,173 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c [2023-12-02 18:23:41,917 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:23:42,089 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:23:42,089 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c [2023-12-02 18:23:42,095 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/data/2481fa39d/a8aa6585c31e4fee81a5d8ae44d9a4c9/FLAGb834acac1 [2023-12-02 18:23:42,109 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/data/2481fa39d/a8aa6585c31e4fee81a5d8ae44d9a4c9 [2023-12-02 18:23:42,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:23:42,114 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:23:42,115 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:23:42,115 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:23:42,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:23:42,121 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b3a8038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42, skipping insertion in model container [2023-12-02 18:23:42,122 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,141 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:23:42,263 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_919e0001-f667-4112-8d95-261633fc7963/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c[458,471] [2023-12-02 18:23:42,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:23:42,287 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:23:42,297 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_919e0001-f667-4112-8d95-261633fc7963/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound2.c[458,471] [2023-12-02 18:23:42,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:23:42,316 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:23:42,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42 WrapperNode [2023-12-02 18:23:42,316 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:23:42,317 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:23:42,317 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:23:42,318 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:23:42,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,329 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,343 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2023-12-02 18:23:42,344 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:23:42,344 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:23:42,344 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:23:42,345 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:23:42,351 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,353 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,356 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,359 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,360 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,361 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:23:42,363 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:23:42,364 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:23:42,364 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:23:42,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (1/1) ... [2023-12-02 18:23:42,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:23:42,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:42,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:23:42,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:23:42,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:23:42,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:23:42,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:23:42,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:23:42,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 18:23:42,437 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 18:23:42,503 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:23:42,505 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:23:42,619 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:23:42,641 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:23:42,641 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:23:42,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:23:42 BoogieIcfgContainer [2023-12-02 18:23:42,643 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:23:42,645 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:23:42,645 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:23:42,648 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:23:42,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:23:42" (1/3) ... [2023-12-02 18:23:42,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303d0e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:23:42, skipping insertion in model container [2023-12-02 18:23:42,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:42" (2/3) ... [2023-12-02 18:23:42,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303d0e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:23:42, skipping insertion in model container [2023-12-02 18:23:42,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:23:42" (3/3) ... [2023-12-02 18:23:42,651 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound2.c [2023-12-02 18:23:42,665 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:23:42,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:23:42,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:23:42,711 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;@728e3b4f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:23:42,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:23:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:23:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 18:23:42,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:42,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 18:23:42,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:42,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2070802916, now seen corresponding path program 1 times [2023-12-02 18:23:42,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:42,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794528434] [2023-12-02 18:23:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:42,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:42,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:42,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794528434] [2023-12-02 18:23:42,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 18:23:42,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697166379] [2023-12-02 18:23:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:42,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:42,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:42,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:42,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:23:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:42,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 18:23:42,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:23:42,938 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 18:23:42,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:23:42,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697166379] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:23:42,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:23:42,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:23:42,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49734802] [2023-12-02 18:23:42,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:23:42,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 18:23:42,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 18:23:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:23:42,974 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:42,995 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2023-12-02 18:23:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 18:23:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 18:23:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:43,003 INFO L225 Difference]: With dead ends: 29 [2023-12-02 18:23:43,004 INFO L226 Difference]: Without dead ends: 13 [2023-12-02 18:23:43,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:23:43,010 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:43,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:23:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-02 18:23:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-02 18:23:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:23:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-12-02 18:23:43,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2023-12-02 18:23:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:43,053 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-12-02 18:23:43,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-12-02 18:23:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:23:43,054 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:43,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:23:43,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:23:43,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 18:23:43,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:43,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:43,261 INFO L85 PathProgramCache]: Analyzing trace with hash -170804699, now seen corresponding path program 1 times [2023-12-02 18:23:43,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:43,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736959323] [2023-12-02 18:23:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:43,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:43,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:43,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736959323] [2023-12-02 18:23:43,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 18:23:43,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674152275] [2023-12-02 18:23:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:43,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:43,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:43,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:43,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:23:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:43,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:23:43,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:23:43,388 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 18:23:43,388 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:23:43,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674152275] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:23:43,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:23:43,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:23:43,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897176737] [2023-12-02 18:23:43,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:23:43,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:23:43,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:43,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:23:43,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:23:43,392 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:43,410 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-12-02 18:23:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:23:43,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 18:23:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:43,411 INFO L225 Difference]: With dead ends: 23 [2023-12-02 18:23:43,411 INFO L226 Difference]: Without dead ends: 15 [2023-12-02 18:23:43,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:23:43,414 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:43,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:23:43,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-02 18:23:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-02 18:23:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:23:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-12-02 18:23:43,420 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2023-12-02 18:23:43,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:43,421 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-12-02 18:23:43,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:43,421 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-12-02 18:23:43,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:23:43,422 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:43,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:23:43,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:23:43,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:43,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:43,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash -169017239, now seen corresponding path program 1 times [2023-12-02 18:23:43,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:43,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859652737] [2023-12-02 18:23:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:43,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:43,638 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:23:43,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693456503] [2023-12-02 18:23:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:43,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:43,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:43,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:43,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:23:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:43,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:23:43,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:23:43,743 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 18:23:43,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:23:43,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:43,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859652737] [2023-12-02 18:23:43,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:23:43,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693456503] [2023-12-02 18:23:43,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693456503] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:23:43,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:23:43,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:23:43,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65094718] [2023-12-02 18:23:43,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:23:43,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:23:43,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:23:43,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:23:43,745 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:43,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:43,899 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-12-02 18:23:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:23:43,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 18:23:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:43,900 INFO L225 Difference]: With dead ends: 25 [2023-12-02 18:23:43,900 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 18:23:43,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:23:43,902 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:43,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:23:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 18:23:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-02 18:23:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:23:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-12-02 18:23:43,910 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2023-12-02 18:23:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:43,911 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-12-02 18:23:43,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-12-02 18:23:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 18:23:43,912 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:43,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:23:43,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:23:44,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:44,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:44,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:44,114 INFO L85 PathProgramCache]: Analyzing trace with hash 867499275, now seen corresponding path program 1 times [2023-12-02 18:23:44,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:44,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713421463] [2023-12-02 18:23:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:44,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:44,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:23:44,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720541605] [2023-12-02 18:23:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:44,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:44,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:44,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:44,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:23:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:44,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:23:44,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:23:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:23:44,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:23:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:23:44,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:44,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713421463] [2023-12-02 18:23:44,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:23:44,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720541605] [2023-12-02 18:23:44,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720541605] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:23:44,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1054592721] [2023-12-02 18:23:44,269 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 18:23:44,269 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:23:44,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:23:44,276 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:23:44,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:23:45,429 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 77 for LOIs [2023-12-02 18:23:45,610 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:23:46,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '345#(and (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_10| Int)) (and (exists ((|v_ULTIMATE.start_main_#t~post5#1_22| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| 32768)) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_22|) (<= |v_ULTIMATE.start_main_#t~post5#1_22| 1) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| 32767) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_10|))) (not (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) 2)))))) (exists ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_8| Int)) (and (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_7|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| 32767) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_8|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| 32768)) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 18:23:46,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:23:46,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:23:46,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2023-12-02 18:23:46,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541760129] [2023-12-02 18:23:46,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:23:46,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:23:46,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:46,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:23:46,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-12-02 18:23:46,859 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:23:46,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:46,896 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-12-02 18:23:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:23:46,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-12-02 18:23:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:46,897 INFO L225 Difference]: With dead ends: 31 [2023-12-02 18:23:46,897 INFO L226 Difference]: Without dead ends: 23 [2023-12-02 18:23:46,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:23:46,899 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:46,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:23:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-02 18:23:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-02 18:23:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:23:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-12-02 18:23:46,905 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2023-12-02 18:23:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:46,905 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-12-02 18:23:46,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:23:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-12-02 18:23:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 18:23:46,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:46,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:23:46,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 18:23:47,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:47,107 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:47,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash 869286735, now seen corresponding path program 1 times [2023-12-02 18:23:47,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:47,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945298092] [2023-12-02 18:23:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:47,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:47,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:23:47,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414102715] [2023-12-02 18:23:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:47,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:47,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:47,115 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:47,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:23:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:47,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 18:23:47,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:23:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:23:47,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:23:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:23:47,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:47,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945298092] [2023-12-02 18:23:47,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:23:47,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414102715] [2023-12-02 18:23:47,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414102715] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:23:47,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535069860] [2023-12-02 18:23:47,292 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 18:23:47,292 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:23:47,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:23:47,293 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:23:47,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:23:47,740 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-12-02 18:23:47,789 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:23:48,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '526#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_23| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| Int)) (and (not (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_23| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|))))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_27| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| 32768)) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| 32767) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_19|) (<= |v_ULTIMATE.start_main_#t~post5#1_27| 1) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_23|) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_27|) (<= 1 ~counter~0))))))' at error location [2023-12-02 18:23:48,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:23:48,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:23:48,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-12-02 18:23:48,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513242098] [2023-12-02 18:23:48,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:23:48,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 18:23:48,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 18:23:48,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-12-02 18:23:48,341 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:23:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:48,416 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-12-02 18:23:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:23:48,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-12-02 18:23:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:48,417 INFO L225 Difference]: With dead ends: 33 [2023-12-02 18:23:48,418 INFO L226 Difference]: Without dead ends: 27 [2023-12-02 18:23:48,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-12-02 18:23:48,419 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:48,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 70 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:23:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-02 18:23:48,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2023-12-02 18:23:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 18:23:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-12-02 18:23:48,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2023-12-02 18:23:48,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:48,423 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-12-02 18:23:48,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:23:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-12-02 18:23:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 18:23:48,424 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:48,424 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 18:23:48,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 18:23:48,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:48,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:48,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:48,625 INFO L85 PathProgramCache]: Analyzing trace with hash 24753612, now seen corresponding path program 1 times [2023-12-02 18:23:48,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:48,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662059000] [2023-12-02 18:23:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:48,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:48,633 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:23:48,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233982122] [2023-12-02 18:23:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:48,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:48,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:48,635 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:48,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:23:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:48,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 18:23:48,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:23:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:23:48,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:23:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:23:48,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:48,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662059000] [2023-12-02 18:23:48,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:23:48,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233982122] [2023-12-02 18:23:48,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233982122] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:23:48,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603658016] [2023-12-02 18:23:48,993 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 18:23:48,993 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:23:48,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:23:48,993 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:23:48,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:23:49,493 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 86 for LOIs [2023-12-02 18:23:49,667 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:23:51,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753#(and (or (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_37| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_32| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_33| Int)) (and (not (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|)) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_37| 4))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_33| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_32| 32768)) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|) (<= 1 ~counter~0) (<= |v_ULTIMATE.start_main_#t~post5#1_33| 1) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_32| 32767) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_33|) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_33|) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_37|))))) (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_32| Int)) (and (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_36| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|) (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|) 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|))) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_32|) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_33| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| 32767) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_32|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| 32768)) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|) (<= |v_ULTIMATE.start_main_#t~post5#1_33| 1) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_33|)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 18:23:51,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:23:51,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:23:51,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-02 18:23:51,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467154747] [2023-12-02 18:23:51,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:23:51,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 18:23:51,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:51,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 18:23:51,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2023-12-02 18:23:51,702 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:23:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:51,941 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-12-02 18:23:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 18:23:51,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-12-02 18:23:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:51,942 INFO L225 Difference]: With dead ends: 47 [2023-12-02 18:23:51,942 INFO L226 Difference]: Without dead ends: 40 [2023-12-02 18:23:51,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-12-02 18:23:51,944 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:51,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 82 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:23:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-02 18:23:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-12-02 18:23:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 18:23:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-12-02 18:23:51,954 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 21 [2023-12-02 18:23:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:51,955 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-12-02 18:23:51,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:23:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-12-02 18:23:51,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 18:23:51,956 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:51,956 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 18:23:51,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:23:52,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 18:23:52,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:52,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:52,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1196295695, now seen corresponding path program 2 times [2023-12-02 18:23:52,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:52,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738890249] [2023-12-02 18:23:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:52,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:52,165 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:23:52,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174027179] [2023-12-02 18:23:52,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:23:52,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:52,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:52,166 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:52,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:23:52,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 18:23:52,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-12-02 18:23:52,209 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 18:23:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 18:23:52,230 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 18:23:52,230 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 18:23:52,231 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 18:23:52,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 18:23:52,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 18:23:52,435 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-12-02 18:23:52,439 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 18:23:52,452 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 18:23:52,453 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 18:23:52,454 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 18:23:52,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:23:52 BoogieIcfgContainer [2023-12-02 18:23:52,461 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 18:23:52,462 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 18:23:52,462 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 18:23:52,462 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 18:23:52,462 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:23:42" (3/4) ... [2023-12-02 18:23:52,463 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 18:23:52,467 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 18:23:52,468 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 18:23:52,468 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated [2023-12-02 18:23:52,493 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 18:23:52,493 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 18:23:52,494 INFO L158 Benchmark]: Toolchain (without parser) took 10380.50ms. Allocated memory was 172.0MB in the beginning and 232.8MB in the end (delta: 60.8MB). Free memory was 124.1MB in the beginning and 87.2MB in the end (delta: 36.8MB). Peak memory consumption was 99.2MB. Max. memory is 16.1GB. [2023-12-02 18:23:52,494 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 100.7MB. Free memory is still 48.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:23:52,495 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.88ms. Allocated memory is still 172.0MB. Free memory was 123.5MB in the beginning and 113.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 18:23:52,495 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.32ms. Allocated memory is still 172.0MB. Free memory was 113.0MB in the beginning and 111.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 18:23:52,495 INFO L158 Benchmark]: Boogie Preprocessor took 18.31ms. Allocated memory is still 172.0MB. Free memory was 111.4MB in the beginning and 110.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 18:23:52,496 INFO L158 Benchmark]: RCFGBuilder took 279.40ms. Allocated memory is still 172.0MB. Free memory was 110.4MB in the beginning and 100.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 18:23:52,496 INFO L158 Benchmark]: TraceAbstraction took 9816.53ms. Allocated memory was 172.0MB in the beginning and 232.8MB in the end (delta: 60.8MB). Free memory was 98.9MB in the beginning and 89.3MB in the end (delta: 9.6MB). Peak memory consumption was 72.0MB. Max. memory is 16.1GB. [2023-12-02 18:23:52,496 INFO L158 Benchmark]: Witness Printer took 31.63ms. Allocated memory is still 232.8MB. Free memory was 89.3MB in the beginning and 87.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 18:23:52,498 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 100.7MB. Free memory is still 48.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 201.88ms. Allocated memory is still 172.0MB. Free memory was 123.5MB in the beginning and 113.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.32ms. Allocated memory is still 172.0MB. Free memory was 113.0MB in the beginning and 111.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.31ms. Allocated memory is still 172.0MB. Free memory was 111.4MB in the beginning and 110.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 279.40ms. Allocated memory is still 172.0MB. Free memory was 110.4MB in the beginning and 100.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9816.53ms. Allocated memory was 172.0MB in the beginning and 232.8MB in the end (delta: 60.8MB). Free memory was 98.9MB in the beginning and 89.3MB in the end (delta: 9.6MB). Peak memory consumption was 72.0MB. Max. memory is 16.1GB. * Witness Printer took 31.63ms. Allocated memory is still 232.8MB. Free memory was 89.3MB in the beginning and 87.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post5 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [c=0, counter=0, k=3, x=0, y=0] [L27] EXPR counter++ VAL [c=0, counter=1, k=3, x=0, y=0] [L27] COND TRUE counter++<2 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=0, counter=1, k=3, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=1, counter=1, k=3, x=1, y=1] [L27] EXPR counter++ VAL [c=1, counter=2, k=3, x=1, y=1] [L27] COND TRUE counter++<2 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=1, counter=2, k=3, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=2, counter=2, k=3, x=9, y=2] [L27] EXPR counter++ VAL [c=2, counter=3, k=3, x=9, y=2] [L27] COND FALSE !(counter++<2) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, counter=3] [L10] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L12] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.7s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47 mSDsluCounter, 293 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 217 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 191 IncrementalHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 76 mSDtfsCounter, 191 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=6, InterpolantAutomatonStates: 40, 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, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 672 SizeOfPredicates, 10 NumberOfNonLiveVariables, 339 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 22/42 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 proved your program to be incorrect! [2023-12-02 18:23:52,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919e0001-f667-4112-8d95-261633fc7963/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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE