./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --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 9671c34313c5e47de5bd2f842db47c3009aa180bae8c949f2010db1179ac602f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 18:55:54,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 18:55:54,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 18:55:54,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 18:55:54,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 18:55:54,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 18:55:54,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 18:55:54,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 18:55:54,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 18:55:54,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 18:55:54,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 18:55:54,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 18:55:54,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 18:55:54,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 18:55:54,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 18:55:54,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 18:55:54,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 18:55:54,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 18:55:54,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 18:55:54,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 18:55:54,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 18:55:54,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 18:55:54,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 18:55:54,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 18:55:54,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 18:55:54,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 18:55:54,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 18:55:54,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 18:55:54,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 18:55:54,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 18:55:54,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 18:55:54,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 18:55:54,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 18:55:54,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 18:55:54,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 18:55:54,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 18:55:54,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 18:55:54,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 18:55:54,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 18:55:54,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 18:55:54,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 18:55:54,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 18:55:54,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 18:55:54,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 18:55:54,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 18:55:54,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 18:55:54,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 18:55:54,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 18:55:54,414 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 18:55:54,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 18:55:54,415 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 18:55:54,415 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 18:55:54,415 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 18:55:54,415 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 18:55:54,415 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 18:55:54,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 18:55:54,416 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 18:55:54,416 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 18:55:54,416 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 18:55:54,416 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 18:55:54,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 18:55:54,417 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 18:55:54,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 18:55:54,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 18:55:54,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 18:55:54,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 18:55:54,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 18:55:54,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 18:55:54,419 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 18:55:54,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 18:55:54,419 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 18:55:54,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 18:55:54,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 18:55:54,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 18:55:54,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:55:54,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 18:55:54,420 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 18:55:54,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 18:55:54,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 18:55:54,421 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 18:55:54,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 18:55:54,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 18:55:54,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 18:55:54,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9671c34313c5e47de5bd2f842db47c3009aa180bae8c949f2010db1179ac602f [2022-11-20 18:55:54,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 18:55:54,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 18:55:54,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 18:55:54,744 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 18:55:54,745 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 18:55:54,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2022-11-20 18:55:58,355 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 18:55:58,553 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 18:55:58,554 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2022-11-20 18:55:58,561 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/data/f4cc78cd6/e6bae2f14f0a47219bd5d06f690d120a/FLAG817d76b3b [2022-11-20 18:55:58,580 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/data/f4cc78cd6/e6bae2f14f0a47219bd5d06f690d120a [2022-11-20 18:55:58,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 18:55:58,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 18:55:58,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 18:55:58,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 18:55:58,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 18:55:58,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fa14925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58, skipping insertion in model container [2022-11-20 18:55:58,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 18:55:58,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 18:55:58,812 WARN L237 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_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c[458,471] [2022-11-20 18:55:58,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:55:58,852 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 18:55:58,865 WARN L237 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_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c[458,471] [2022-11-20 18:55:58,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:55:58,891 INFO L208 MainTranslator]: Completed translation [2022-11-20 18:55:58,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58 WrapperNode [2022-11-20 18:55:58,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 18:55:58,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 18:55:58,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 18:55:58,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 18:55:58,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,929 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2022-11-20 18:55:58,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 18:55:58,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 18:55:58,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 18:55:58,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 18:55:58,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,964 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 18:55:58,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 18:55:58,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 18:55:58,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 18:55:58,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (1/1) ... [2022-11-20 18:55:58,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:55:59,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:55:59,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 18:55:59,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 18:55:59,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 18:55:59,067 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 18:55:59,067 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 18:55:59,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 18:55:59,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 18:55:59,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 18:55:59,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 18:55:59,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 18:55:59,155 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 18:55:59,159 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 18:55:59,434 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 18:55:59,475 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 18:55:59,476 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 18:55:59,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:55:59 BoogieIcfgContainer [2022-11-20 18:55:59,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 18:55:59,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 18:55:59,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 18:55:59,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 18:55:59,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:55:58" (1/3) ... [2022-11-20 18:55:59,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35eeca57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:55:59, skipping insertion in model container [2022-11-20 18:55:59,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:55:58" (2/3) ... [2022-11-20 18:55:59,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35eeca57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:55:59, skipping insertion in model container [2022-11-20 18:55:59,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:55:59" (3/3) ... [2022-11-20 18:55:59,491 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound5.c [2022-11-20 18:55:59,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 18:55:59,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 18:55:59,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 18:55:59,589 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=LoopsAndPotentialCycles, 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;@12ad47cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 18:55:59,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 18:55:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 18:55:59,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 18:55:59,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:55:59,606 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:55:59,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:55:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:55:59,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2113922188, now seen corresponding path program 1 times [2022-11-20 18:55:59,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:55:59,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547465974] [2022-11-20 18:55:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:55:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:59,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:55:59,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547465974] [2022-11-20 18:55:59,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 18:55:59,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694258663] [2022-11-20 18:55:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:55:59,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:55:59,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:55:59,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:55:59,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 18:55:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:55:59,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 18:55:59,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:55:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:55:59,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:55:59,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694258663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:55:59,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:55:59,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 18:55:59,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997238508] [2022-11-20 18:55:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:55:59,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 18:55:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:55:59,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 18:55:59,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 18:55:59,991 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 18:56:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:00,019 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2022-11-20 18:56:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 18:56:00,022 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2022-11-20 18:56:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:00,032 INFO L225 Difference]: With dead ends: 32 [2022-11-20 18:56:00,032 INFO L226 Difference]: Without dead ends: 17 [2022-11-20 18:56:00,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 18:56:00,049 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:00,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 18:56:00,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-20 18:56:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-20 18:56:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 18:56:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-20 18:56:00,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2022-11-20 18:56:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:00,125 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-20 18:56:00,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 18:56:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-20 18:56:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 18:56:00,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:00,132 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:00,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:00,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 18:56:00,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:00,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:00,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2066763035, now seen corresponding path program 1 times [2022-11-20 18:56:00,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:56:00,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072445372] [2022-11-20 18:56:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:00,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:56:00,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 18:56:00,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437336685] [2022-11-20 18:56:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:00,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:00,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:00,390 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:00,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 18:56:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 18:56:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:56:00,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:56:00,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:56:00,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072445372] [2022-11-20 18:56:00,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 18:56:00,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437336685] [2022-11-20 18:56:00,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437336685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:56:00,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:56:00,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 18:56:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957111286] [2022-11-20 18:56:00,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:56:00,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 18:56:00,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:56:00,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 18:56:00,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 18:56:00,562 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 18:56:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:00,657 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-20 18:56:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 18:56:00,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2022-11-20 18:56:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:00,659 INFO L225 Difference]: With dead ends: 28 [2022-11-20 18:56:00,659 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 18:56:00,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 18:56:00,662 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:00,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 50 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 18:56:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 18:56:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-20 18:56:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 18:56:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-20 18:56:00,673 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2022-11-20 18:56:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:00,673 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-20 18:56:00,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 18:56:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-20 18:56:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 18:56:00,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:00,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:00,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:00,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:00,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1985624712, now seen corresponding path program 1 times [2022-11-20 18:56:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:56:00,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889446240] [2022-11-20 18:56:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:00,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:56:00,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 18:56:00,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502742208] [2022-11-20 18:56:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:00,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:00,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:00,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:00,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 18:56:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:00,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 18:56:00,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:56:01,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 18:56:01,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:56:01,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889446240] [2022-11-20 18:56:01,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 18:56:01,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502742208] [2022-11-20 18:56:01,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502742208] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 18:56:01,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 18:56:01,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-20 18:56:01,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500806748] [2022-11-20 18:56:01,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:56:01,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 18:56:01,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:56:01,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 18:56:01,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 18:56:01,753 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 18:56:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:56:01,851 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-20 18:56:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 18:56:01,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2022-11-20 18:56:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:56:01,855 INFO L225 Difference]: With dead ends: 30 [2022-11-20 18:56:01,855 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 18:56:01,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-20 18:56:01,858 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 18:56:01,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 18:56:01,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 18:56:01,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-20 18:56:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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) [2022-11-20 18:56:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-11-20 18:56:01,898 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2022-11-20 18:56:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:56:01,898 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-11-20 18:56:01,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 18:56:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-11-20 18:56:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 18:56:01,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:56:01,901 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:56:01,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 18:56:02,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:02,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:56:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:56:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1002189902, now seen corresponding path program 1 times [2022-11-20 18:56:02,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:56:02,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801873280] [2022-11-20 18:56:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:02,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:56:02,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 18:56:02,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166581073] [2022-11-20 18:56:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:56:02,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:56:02,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:56:02,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:56:02,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 18:56:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:56:02,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 18:56:02,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:56:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 18:56:02,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:56:06,618 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) .cse0) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2022-11-20 18:56:26,785 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0) (= (mod (+ (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0 (* 7 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 12) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2022-11-20 18:56:44,922 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0) (= (mod (+ (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) .cse0 (* 7 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 12) 0)))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-20 18:56:48,961 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) .cse0) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2022-11-20 18:56:57,059 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))))) is different from false [2022-11-20 18:56:59,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:56:59,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801873280] [2022-11-20 18:56:59,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 18:56:59,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166581073] [2022-11-20 18:56:59,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166581073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:56:59,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707171658] [2022-11-20 18:56:59,143 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-20 18:56:59,144 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:56:59,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:56:59,156 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:56:59,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:56:59,944 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-20 18:56:59,967 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2022-11-20 18:57:00,008 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:57:01,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '617#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:57:01,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:57:01,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 18:57:01,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-20 18:57:01,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743553028] [2022-11-20 18:57:01,158 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 18:57:01,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 18:57:01,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:57:01,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 18:57:01,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=400, Unknown=5, NotChecked=220, Total=702 [2022-11-20 18:57:01,160 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 18:57:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:57:01,408 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-11-20 18:57:01,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 18:57:01,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2022-11-20 18:57:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:57:01,411 INFO L225 Difference]: With dead ends: 35 [2022-11-20 18:57:01,411 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 18:57:01,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=96, Invalid=519, Unknown=5, NotChecked=250, Total=870 [2022-11-20 18:57:01,413 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:57:01,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 60 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 18:57:01,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 18:57:01,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-20 18:57:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 18:57:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-20 18:57:01,430 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 31 [2022-11-20 18:57:01,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:57:01,432 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-20 18:57:01,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 18:57:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-20 18:57:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 18:57:01,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:57:01,435 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:57:01,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 18:57:01,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:57:01,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:57:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:57:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash -180873249, now seen corresponding path program 2 times [2022-11-20 18:57:01,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:57:01,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464837989] [2022-11-20 18:57:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:57:01,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:57:01,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 18:57:01,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577591190] [2022-11-20 18:57:01,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 18:57:01,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:57:01,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:57:01,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:57:01,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 18:57:01,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 18:57:01,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:57:01,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 18:57:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:57:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 18:57:02,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:57:06,520 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (not (let ((.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (<= (+ (* .cse0 10) .cse1 |c_ULTIMATE.start_main_~x~0#1| (* 5 .cse2)) (div (+ (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (* 119 .cse0) (* .cse2 65) (* .cse1 18)) 12)))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))))) is different from false [2022-11-20 18:57:06,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:57:06,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464837989] [2022-11-20 18:57:06,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 18:57:06,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577591190] [2022-11-20 18:57:06,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577591190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:57:06,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [580277991] [2022-11-20 18:57:06,703 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-20 18:57:06,703 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:57:06,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:57:06,704 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:57:06,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:57:07,279 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-20 18:57:07,284 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2022-11-20 18:57:07,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:57:08,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '913#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:57:08,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:57:08,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 18:57:08,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-20 18:57:08,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673098188] [2022-11-20 18:57:08,319 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 18:57:08,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 18:57:08,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:57:08,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 18:57:08,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=710, Unknown=1, NotChecked=54, Total=870 [2022-11-20 18:57:08,321 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 18:57:08,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:57:08,674 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-11-20 18:57:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 18:57:08,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2022-11-20 18:57:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:57:08,676 INFO L225 Difference]: With dead ends: 38 [2022-11-20 18:57:08,676 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 18:57:08,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=129, Invalid=866, Unknown=1, NotChecked=60, Total=1056 [2022-11-20 18:57:08,678 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:57:08,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 85 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 18:57:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 18:57:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-20 18:57:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 18:57:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-20 18:57:08,694 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 38 [2022-11-20 18:57:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:57:08,695 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-20 18:57:08,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 18:57:08,695 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-20 18:57:08,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 18:57:08,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:57:08,697 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:57:08,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 18:57:08,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:57:08,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:57:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:57:08,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1515507950, now seen corresponding path program 3 times [2022-11-20 18:57:08,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:57:08,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941773968] [2022-11-20 18:57:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:57:08,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:57:08,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 18:57:08,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718404327] [2022-11-20 18:57:08,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 18:57:08,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:57:08,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:57:08,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:57:08,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 18:57:08,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 18:57:08,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:57:08,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 18:57:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:57:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 18:57:09,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:57:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 18:57:09,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:57:09,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941773968] [2022-11-20 18:57:09,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 18:57:09,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718404327] [2022-11-20 18:57:09,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718404327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:57:09,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598880065] [2022-11-20 18:57:09,642 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-20 18:57:09,642 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:57:09,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:57:09,643 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:57:09,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:57:10,255 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-20 18:57:10,262 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2022-11-20 18:57:10,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:57:11,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1317#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:57:11,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:57:11,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 18:57:11,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2022-11-20 18:57:11,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274078685] [2022-11-20 18:57:11,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 18:57:11,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 18:57:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:57:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 18:57:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-11-20 18:57:11,435 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 12 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-20 18:57:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:57:12,452 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2022-11-20 18:57:12,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 18:57:12,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 12 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 45 [2022-11-20 18:57:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:57:12,461 INFO L225 Difference]: With dead ends: 53 [2022-11-20 18:57:12,461 INFO L226 Difference]: Without dead ends: 45 [2022-11-20 18:57:12,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 18:57:12,463 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 18:57:12,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 153 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 18:57:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-20 18:57:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-11-20 18:57:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 18:57:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-11-20 18:57:12,520 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 45 [2022-11-20 18:57:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:57:12,522 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-11-20 18:57:12,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 12 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-20 18:57:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-11-20 18:57:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 18:57:12,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:57:12,531 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:57:12,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 18:57:12,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 18:57:12,738 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:57:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:57:12,739 INFO L85 PathProgramCache]: Analyzing trace with hash -949240366, now seen corresponding path program 4 times [2022-11-20 18:57:12,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:57:12,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044179149] [2022-11-20 18:57:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:57:12,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:57:12,762 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 18:57:12,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425793500] [2022-11-20 18:57:12,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 18:57:12,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:57:12,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:57:12,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:57:12,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 18:57:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:57:12,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 18:57:12,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:57:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 154 proven. 1 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-20 18:57:13,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:57:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 102 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-20 18:57:13,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:57:13,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044179149] [2022-11-20 18:57:13,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 18:57:13,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425793500] [2022-11-20 18:57:13,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425793500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:57:13,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280776947] [2022-11-20 18:57:13,344 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-20 18:57:13,345 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:57:13,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:57:13,346 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:57:13,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:57:13,893 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-20 18:57:13,904 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2022-11-20 18:57:13,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:57:14,910 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1950#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 18:57:14,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 18:57:14,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 18:57:14,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-11-20 18:57:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136801478] [2022-11-20 18:57:14,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 18:57:14,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 18:57:14,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:57:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 18:57:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2022-11-20 18:57:14,913 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 18 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-20 18:57:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:57:15,049 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-11-20 18:57:15,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 18:57:15,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 18 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) Word has length 73 [2022-11-20 18:57:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:57:15,051 INFO L225 Difference]: With dead ends: 49 [2022-11-20 18:57:15,051 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 18:57:15,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2022-11-20 18:57:15,053 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:57:15,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 130 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 18:57:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 18:57:15,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 18:57:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:57:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 18:57:15,056 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2022-11-20 18:57:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:57:15,056 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 18:57:15,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 18 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-20 18:57:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 18:57:15,057 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 18:57:15,060 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 18:57:15,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 18:57:15,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:57:15,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-20 18:57:16,717 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-20 18:57:16,718 INFO L895 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (let ((.cse3 (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse5 (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (.cse4 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (let ((.cse2 (<= 0 |ULTIMATE.start_main_~k~0#1|)) (.cse0 (<= |ULTIMATE.start_main_~k~0#1| 5)) (.cse1 (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse4))) (.cse6 (or (= .cse3 .cse4) .cse5))) (or (and (= 3 |ULTIMATE.start_main_~y~0#1|) .cse0 (<= 3 |ULTIMATE.start_main_~c~0#1|) .cse1 (< 2 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 3)) (and .cse2 (or (= (+ |ULTIMATE.start_main_~k~0#1| .cse3) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) .cse4 1)) (not .cse5)) .cse0 .cse1 .cse6 (<= 4 |ULTIMATE.start_main_~c~0#1|)) (and .cse2 (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) .cse0 (= |ULTIMATE.start_main_~x~0#1| 0)) (and (= |ULTIMATE.start_main_~c~0#1| 1) .cse0 (= |ULTIMATE.start_main_~y~0#1| 1) .cse1 .cse6) (and (= 2 |ULTIMATE.start_main_~y~0#1|) .cse0 .cse1 .cse6 (= 2 |ULTIMATE.start_main_~c~0#1|))))) [2022-11-20 18:57:16,718 INFO L899 garLoopResultBuilder]: For program point L29-1(lines 28 37) no Hoare annotation was computed. [2022-11-20 18:57:16,718 INFO L902 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2022-11-20 18:57:16,718 INFO L895 garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 5)) [2022-11-20 18:57:16,718 INFO L902 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: true [2022-11-20 18:57:16,718 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-20 18:57:16,719 INFO L895 garLoopResultBuilder]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse3 (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse5 (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (.cse4 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (let ((.cse2 (<= 0 |ULTIMATE.start_main_~k~0#1|)) (.cse0 (<= |ULTIMATE.start_main_~k~0#1| 5)) (.cse1 (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse4))) (.cse6 (or (= .cse3 .cse4) .cse5))) (or (and (= 3 |ULTIMATE.start_main_~y~0#1|) .cse0 (<= 3 |ULTIMATE.start_main_~c~0#1|) .cse1 (< 2 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 3)) (and .cse2 (or (= (+ |ULTIMATE.start_main_~k~0#1| .cse3) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) .cse4 1)) (not .cse5)) .cse0 .cse1 .cse6 (<= 4 |ULTIMATE.start_main_~c~0#1|)) (and .cse2 (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) .cse0 (= |ULTIMATE.start_main_~x~0#1| 0)) (and (= |ULTIMATE.start_main_~c~0#1| 1) .cse0 (= |ULTIMATE.start_main_~y~0#1| 1) .cse1 .cse6) (and (= 2 |ULTIMATE.start_main_~y~0#1|) .cse0 .cse1 .cse6 (= 2 |ULTIMATE.start_main_~c~0#1|))))) [2022-11-20 18:57:16,719 INFO L895 garLoopResultBuilder]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (let ((.cse0 (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse1)))) (or (and (<= |ULTIMATE.start_main_~k~0#1| 2) (= 2 |ULTIMATE.start_main_~y~0#1|) (< 1 |ULTIMATE.start_main_~k~0#1|) .cse0) (and (<= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1) .cse0 (< 0 |ULTIMATE.start_main_~k~0#1|)) (and (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0)) (let ((.cse3 (< (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)) (.cse2 (< (+ 2 |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~k~0#1|))) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (= (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|) .cse1) (or .cse2 (not .cse3)) (or (not (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) .cse3) (<= |ULTIMATE.start_main_~k~0#1| 5) .cse0 (or (< (+ 3 |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~k~0#1|) (not .cse2))))))) [2022-11-20 18:57:16,720 INFO L899 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2022-11-20 18:57:16,720 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (let ((.cse0 (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse1)))) (or (and (<= |ULTIMATE.start_main_~k~0#1| 2) (= 2 |ULTIMATE.start_main_~y~0#1|) (< 1 |ULTIMATE.start_main_~k~0#1|) .cse0) (and (<= |ULTIMATE.start_main_~k~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1) .cse0 (< 0 |ULTIMATE.start_main_~k~0#1|)) (and (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0)) (let ((.cse3 (< (+ |ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)) (.cse2 (< (+ 2 |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~k~0#1|))) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) (= (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|) .cse1) (or .cse2 (not .cse3)) (or (not (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) .cse3) (<= |ULTIMATE.start_main_~k~0#1| 5) .cse0 (or (< (+ 3 |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~k~0#1|) (not .cse2))))))) [2022-11-20 18:57:16,720 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2022-11-20 18:57:16,720 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2022-11-20 18:57:16,720 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-11-20 18:57:16,720 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2022-11-20 18:57:16,721 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2022-11-20 18:57:16,721 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2022-11-20 18:57:16,721 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2022-11-20 18:57:16,721 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-11-20 18:57:16,725 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-20 18:57:16,727 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 18:57:16,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:57:16 BoogieIcfgContainer [2022-11-20 18:57:16,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 18:57:16,748 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 18:57:16,748 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 18:57:16,749 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 18:57:16,749 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:55:59" (3/4) ... [2022-11-20 18:57:16,753 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-20 18:57:16,760 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-20 18:57:16,761 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-20 18:57:16,765 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2022-11-20 18:57:16,765 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-20 18:57:16,766 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-20 18:57:16,766 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-20 18:57:16,805 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/witness.graphml [2022-11-20 18:57:16,805 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 18:57:16,806 INFO L158 Benchmark]: Toolchain (without parser) took 78221.38ms. Allocated memory was 134.2MB in the beginning and 182.5MB in the end (delta: 48.2MB). Free memory was 90.2MB in the beginning and 140.2MB in the end (delta: -50.0MB). Peak memory consumption was 164.1kB. Max. memory is 16.1GB. [2022-11-20 18:57:16,806 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 134.2MB. Free memory is still 100.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 18:57:16,807 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.84ms. Allocated memory is still 134.2MB. Free memory was 90.2MB in the beginning and 79.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 18:57:16,807 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.18ms. Allocated memory is still 134.2MB. Free memory was 79.6MB in the beginning and 78.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 18:57:16,808 INFO L158 Benchmark]: Boogie Preprocessor took 45.94ms. Allocated memory is still 134.2MB. Free memory was 78.1MB in the beginning and 77.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 18:57:16,808 INFO L158 Benchmark]: RCFGBuilder took 501.93ms. Allocated memory is still 134.2MB. Free memory was 77.0MB in the beginning and 65.6MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 18:57:16,809 INFO L158 Benchmark]: TraceAbstraction took 77265.75ms. Allocated memory was 134.2MB in the beginning and 182.5MB in the end (delta: 48.2MB). Free memory was 65.1MB in the beginning and 143.4MB in the end (delta: -78.3MB). Peak memory consumption was 69.4MB. Max. memory is 16.1GB. [2022-11-20 18:57:16,809 INFO L158 Benchmark]: Witness Printer took 57.08ms. Allocated memory is still 182.5MB. Free memory was 143.4MB in the beginning and 140.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 18:57:16,812 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 134.2MB. Free memory is still 100.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.84ms. Allocated memory is still 134.2MB. Free memory was 90.2MB in the beginning and 79.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.18ms. Allocated memory is still 134.2MB. Free memory was 79.6MB in the beginning and 78.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.94ms. Allocated memory is still 134.2MB. Free memory was 78.1MB in the beginning and 77.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 501.93ms. Allocated memory is still 134.2MB. Free memory was 77.0MB in the beginning and 65.6MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 77265.75ms. Allocated memory was 134.2MB in the beginning and 182.5MB in the end (delta: 48.2MB). Free memory was 65.1MB in the beginning and 143.4MB in the end (delta: -78.3MB). Peak memory consumption was 69.4MB. Max. memory is 16.1GB. * Witness Printer took 57.08ms. Allocated memory is still 182.5MB. Free memory was 143.4MB in the beginning and 140.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 77.2s, OverallIterations: 7, TraceHistogramMax: 10, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 73 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 67 mSDsluCounter, 536 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 406 mSDsCounter, 60 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 681 IncrementalHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 60 mSolverCounterUnsat, 130 mSDtfsCounter, 681 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 602 GetRequests, 457 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 18.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=6, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 32 PreInvPairs, 55 NumberOfFragments, 855 HoareAnnotationTreeSize, 32 FomulaSimplifications, 59 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 864 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 63.8s InterpolantComputationTime, 246 NumberOfCodeBlocks, 239 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 361 ConstructedInterpolants, 0 QuantifiedInterpolants, 1654 SizeOfPredicates, 17 NumberOfNonLiveVariables, 678 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 656/718 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((((((3 == y && k <= 5) && 3 <= c) && 6 * (y * y * y * y * y) + 2 * (y * y * y * y * y * y) + 5 * (y * y * y * y) == x * 12 + y * y) && 2 < k) && c <= 3) || (((((0 <= k && (k + k * y == 2 * y + y * y + 1 || !(c < k))) && k <= 5) && 6 * (y * y * y * y * y) + 2 * (y * y * y * y * y * y) + 5 * (y * y * y * y) == x * 12 + y * y) && (k * y == y * y || c < k)) && 4 <= c)) || ((((0 <= k && c == 0) && y == 0) && k <= 5) && x == 0)) || ((((c == 1 && k <= 5) && y == 1) && 6 * (y * y * y * y * y) + 2 * (y * y * y * y * y * y) + 5 * (y * y * y * y) == x * 12 + y * y) && (k * y == y * y || c < k))) || ((((2 == y && k <= 5) && 6 * (y * y * y * y * y) + 2 * (y * y * y * y * y * y) + 5 * (y * y * y * y) == x * 12 + y * y) && (k * y == y * y || c < k)) && 2 == c) - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-20 18:57:16,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39fc78f-71a5-4410-a1f5-ee46bf44d4fa/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE