./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh --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 34fd2c5bce28a2f0a39de6b9c2d306403d911c32b4998862fc7a657ddcb319f4 --- 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-2329fc7 [2022-12-14 10:16:33,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:16:33,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:16:33,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:16:33,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:16:33,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:16:33,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:16:33,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:16:33,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:16:33,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:16:33,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:16:33,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:16:33,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:16:33,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:16:33,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:16:33,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:16:33,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:16:33,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:16:33,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:16:33,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:16:33,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:16:33,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:16:33,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:16:33,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:16:33,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:16:33,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:16:33,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:16:33,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:16:33,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:16:33,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:16:33,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:16:33,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:16:33,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:16:33,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:16:33,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:16:33,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:16:33,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:16:33,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:16:33,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:16:33,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:16:33,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:16:33,818 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:16:33,840 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:16:33,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:16:33,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:16:33,841 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:16:33,842 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:16:33,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:16:33,842 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:16:33,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:16:33,843 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:16:33,843 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:16:33,843 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:16:33,843 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:16:33,844 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:16:33,844 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:16:33,844 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:16:33,844 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:16:33,844 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:16:33,845 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:16:33,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:16:33,845 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:16:33,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:16:33,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:16:33,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:16:33,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:16:33,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:16:33,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:16:33,847 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:16:33,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:16:33,847 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:16:33,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:16:33,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:16:33,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:16:33,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:16:33,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:16:33,848 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:16:33,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:16:33,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:16:33,849 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:16:33,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:16:33,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:16:33,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:16:33,849 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_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34fd2c5bce28a2f0a39de6b9c2d306403d911c32b4998862fc7a657ddcb319f4 [2022-12-14 10:16:34,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:16:34,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:16:34,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:16:34,065 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:16:34,065 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:16:34,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2022-12-14 10:16:36,610 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:16:36,754 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:16:36,755 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2022-12-14 10:16:36,759 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/data/810593002/83e8c63e8f494a82bfa12f9c23b61dc3/FLAG9b8213c15 [2022-12-14 10:16:37,178 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/data/810593002/83e8c63e8f494a82bfa12f9c23b61dc3 [2022-12-14 10:16:37,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:16:37,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:16:37,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:16:37,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:16:37,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:16:37,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ea6c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37, skipping insertion in model container [2022-12-14 10:16:37,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:16:37,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:16:37,299 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_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2022-12-14 10:16:37,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:16:37,317 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:16:37,325 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_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2022-12-14 10:16:37,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:16:37,338 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:16:37,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37 WrapperNode [2022-12-14 10:16:37,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:16:37,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:16:37,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:16:37,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:16:37,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,361 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2022-12-14 10:16:37,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:16:37,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:16:37,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:16:37,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:16:37,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,374 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:16:37,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:16:37,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:16:37,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:16:37,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (1/1) ... [2022-12-14 10:16:37,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:16:37,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:16:37,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:16:37,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:16:37,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:16:37,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:16:37,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:16:37,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:16:37,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 10:16:37,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 10:16:37,490 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:16:37,492 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:16:37,588 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:16:37,602 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:16:37,603 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 10:16:37,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:16:37 BoogieIcfgContainer [2022-12-14 10:16:37,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:16:37,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:16:37,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:16:37,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:16:37,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:16:37" (1/3) ... [2022-12-14 10:16:37,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7483128e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:16:37, skipping insertion in model container [2022-12-14 10:16:37,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:16:37" (2/3) ... [2022-12-14 10:16:37,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7483128e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:16:37, skipping insertion in model container [2022-12-14 10:16:37,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:16:37" (3/3) ... [2022-12-14 10:16:37,613 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.c [2022-12-14 10:16:37,631 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:16:37,631 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:16:37,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:16:37,675 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;@10699047, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:16:37,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:16:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:16:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:16:37,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:16:37,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 10:16:37,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:16:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:16:37,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2070802916, now seen corresponding path program 1 times [2022-12-14 10:16:37,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:16:37,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826061557] [2022-12-14 10:16:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:37,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:16:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:16:37,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:16:37,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826061557] [2022-12-14 10:16:37,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 10:16:37,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508677896] [2022-12-14 10:16:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:37,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:37,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:16:37,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:16:37,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:16:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:16:37,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 10:16:37,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:16:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:37,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:16:37,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508677896] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:16:37,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:16:37,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:16:37,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023477895] [2022-12-14 10:16:37,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:16:37,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 10:16:37,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:16:37,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 10:16:37,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:16:37,885 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:16:37,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:16:37,908 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-12-14 10:16:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 10:16:37,910 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:16:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:16:37,915 INFO L225 Difference]: With dead ends: 29 [2022-12-14 10:16:37,915 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 10:16:37,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:16:37,919 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:16:37,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:16:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 10:16:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 10:16:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:16:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-12-14 10:16:37,945 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2022-12-14 10:16:37,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:16:37,946 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-12-14 10:16:37,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:16:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-12-14 10:16:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:16:37,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:16:37,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:16:37,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:16:38,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 10:16:38,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:16:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:16:38,152 INFO L85 PathProgramCache]: Analyzing trace with hash -170804699, now seen corresponding path program 1 times [2022-12-14 10:16:38,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:16:38,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924820334] [2022-12-14 10:16:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:38,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:16:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:16:38,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:16:38,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924820334] [2022-12-14 10:16:38,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 10:16:38,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477859558] [2022-12-14 10:16:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:38,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:38,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:16:38,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:16:38,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:16:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:16:38,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:16:38,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:16:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:38,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:16:38,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477859558] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:16:38,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:16:38,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:16:38,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914459941] [2022-12-14 10:16:38,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:16:38,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:16:38,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:16:38,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:16:38,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:16:38,322 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:16:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:16:38,335 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-12-14 10:16:38,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:16:38,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:16:38,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:16:38,335 INFO L225 Difference]: With dead ends: 23 [2022-12-14 10:16:38,336 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 10:16:38,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:16:38,337 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:16:38,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:16:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 10:16:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 10:16:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:16:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-12-14 10:16:38,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2022-12-14 10:16:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:16:38,341 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-12-14 10:16:38,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:16:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-12-14 10:16:38,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:16:38,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:16:38,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:16:38,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 10:16:38,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:38,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:16:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:16:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash -169017239, now seen corresponding path program 1 times [2022-12-14 10:16:38,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:16:38,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853744911] [2022-12-14 10:16:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:38,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:16:38,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:16:38,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779409577] [2022-12-14 10:16:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:38,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:38,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:16:38,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:16:38,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:16:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:16:38,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:16:38,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:16:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:38,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:16:38,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:16:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853744911] [2022-12-14 10:16:38,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:16:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779409577] [2022-12-14 10:16:38,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779409577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:16:38,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:16:38,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:16:38,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352318082] [2022-12-14 10:16:38,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:16:38,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:16:38,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:16:38,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:16:38,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:16:38,687 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:16:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:16:38,731 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-12-14 10:16:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:16:38,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:16:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:16:38,733 INFO L225 Difference]: With dead ends: 25 [2022-12-14 10:16:38,733 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 10:16:38,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:16:38,735 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 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 [2022-12-14 10:16:38,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:16:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 10:16:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 10:16:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:16:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 10:16:38,741 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2022-12-14 10:16:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:16:38,741 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 10:16:38,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:16:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 10:16:38,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:16:38,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:16:38,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:16:38,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:16:38,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:38,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:16:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:16:38,946 INFO L85 PathProgramCache]: Analyzing trace with hash 867499275, now seen corresponding path program 1 times [2022-12-14 10:16:38,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:16:38,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367628161] [2022-12-14 10:16:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:38,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:16:38,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:16:38,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367366348] [2022-12-14 10:16:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:38,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:38,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:16:38,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:16:38,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:16:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:16:39,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:16:39,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:16:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:39,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:16:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:39,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:16:39,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367628161] [2022-12-14 10:16:39,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:16:39,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367366348] [2022-12-14 10:16:39,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367366348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:16:39,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447460937] [2022-12-14 10:16:39,126 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:16:39,126 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:16:39,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:16:39,133 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:16:39,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:16:39,718 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2022-12-14 10:16:39,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:16:40,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '350#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 10:16:40,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:16:40,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:16:40,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-12-14 10:16:40,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755871469] [2022-12-14 10:16:40,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 10:16:40,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:16:40,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:16:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:16:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:16:40,473 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:16:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:16:40,554 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-12-14 10:16:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 10:16:40,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-12-14 10:16:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:16:40,556 INFO L225 Difference]: With dead ends: 55 [2022-12-14 10:16:40,556 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 10:16:40,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:16:40,558 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:16:40,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 86 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:16:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 10:16:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-12-14 10:16:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 10:16:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-12-14 10:16:40,563 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2022-12-14 10:16:40,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:16:40,563 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-12-14 10:16:40,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:16:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-12-14 10:16:40,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:16:40,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:16:40,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:16:40,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 10:16:40,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:40,766 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:16:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:16:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash 869286735, now seen corresponding path program 1 times [2022-12-14 10:16:40,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:16:40,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452215279] [2022-12-14 10:16:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:16:40,785 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:16:40,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443568249] [2022-12-14 10:16:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:40,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:40,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:16:40,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:16:40,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:16:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:16:40,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 10:16:40,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:16:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:40,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:16:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:16:41,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:16:41,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452215279] [2022-12-14 10:16:41,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:16:41,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443568249] [2022-12-14 10:16:41,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443568249] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:16:41,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1751051562] [2022-12-14 10:16:41,054 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 10:16:41,054 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:16:41,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:16:41,055 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:16:41,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:16:41,334 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2022-12-14 10:16:41,355 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:16:41,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '598#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:16:41,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:16:41,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:16:41,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-12-14 10:16:41,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304975539] [2022-12-14 10:16:41,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 10:16:41,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:16:41,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:16:41,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:16:41,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:16:41,707 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:16:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:16:41,790 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-12-14 10:16:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:16:41,790 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-12-14 10:16:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:16:41,791 INFO L225 Difference]: With dead ends: 57 [2022-12-14 10:16:41,791 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 10:16:41,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:16:41,793 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:16:41,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 42 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:16:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 10:16:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-12-14 10:16:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 10:16:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-12-14 10:16:41,799 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2022-12-14 10:16:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:16:41,799 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-12-14 10:16:41,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:16:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-12-14 10:16:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 10:16:41,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:16:41,800 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 10:16:41,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:16:42,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:42,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:16:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:16:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash 24753612, now seen corresponding path program 1 times [2022-12-14 10:16:42,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:16:42,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308027270] [2022-12-14 10:16:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:42,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:16:42,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:16:42,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927419511] [2022-12-14 10:16:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:16:42,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:16:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:16:42,012 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:16:42,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:16:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:16:42,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:16:42,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:16:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:16:42,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:17:16,332 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3)) 4) 0)))) is different from true [2022-12-14 10:17:34,398 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 10:17:42,439 WARN L837 $PredicateComparison]: unable to prove that (or (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|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |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| 3) (* |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| 3)) 4) 0))) is different from false [2022-12-14 10:17:44,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:17:44,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308027270] [2022-12-14 10:17:44,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:17:44,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927419511] [2022-12-14 10:17:44,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927419511] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:17:44,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [107048471] [2022-12-14 10:17:44,465 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:17:44,465 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:17:44,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:17:44,466 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:17:44,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:17:44,729 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 10:17:44,790 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:17:45,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '862#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:17:45,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:17:45,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:17:45,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-12-14 10:17:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881835659] [2022-12-14 10:17:45,450 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:17:45,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 10:17:45,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:17:45,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 10:17:45,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=389, Unknown=9, NotChecked=126, Total=600 [2022-12-14 10:17:45,451 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:17:45,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:17:45,523 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2022-12-14 10:17:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:17:45,523 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-12-14 10:17:45,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:17:45,524 INFO L225 Difference]: With dead ends: 45 [2022-12-14 10:17:45,524 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 10:17:45,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=98, Invalid=505, Unknown=9, NotChecked=144, Total=756 [2022-12-14 10:17:45,525 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:17:45,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:17:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 10:17:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 10:17:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 10:17:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-12-14 10:17:45,532 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 21 [2022-12-14 10:17:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:17:45,532 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-12-14 10:17:45,532 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:17:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-12-14 10:17:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 10:17:45,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:17:45,533 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2022-12-14 10:17:45,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:17:45,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:17:45,735 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:17:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:17:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash 44232242, now seen corresponding path program 2 times [2022-12-14 10:17:45,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:17:45,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454791043] [2022-12-14 10:17:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:17:45,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:17:45,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:17:45,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107357025] [2022-12-14 10:17:45,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:17:45,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:17:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:17:45,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:17:45,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:17:45,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:17:45,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:17:45,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:17:45,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:17:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:17:45,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:17:50,027 WARN L837 $PredicateComparison]: unable to prove that (or (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|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |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| 3) (* |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| 3)) 4) 0))) is different from false [2022-12-14 10:17:50,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:17:50,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454791043] [2022-12-14 10:17:50,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:17:50,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107357025] [2022-12-14 10:17:50,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107357025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:17:50,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [461494531] [2022-12-14 10:17:50,031 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:17:50,031 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:17:50,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:17:50,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:17:50,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:17:50,275 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 10:17:50,325 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:17:50,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1135#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:17:50,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:17:50,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:17:50,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-12-14 10:17:50,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938540314] [2022-12-14 10:17:50,944 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:17:50,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 10:17:50,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:17:50,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 10:17:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=438, Unknown=1, NotChecked=42, Total=552 [2022-12-14 10:17:50,946 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:17:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:17:51,049 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-12-14 10:17:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 10:17:51,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-12-14 10:17:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:17:51,051 INFO L225 Difference]: With dead ends: 45 [2022-12-14 10:17:51,051 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 10:17:51,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=92, Invalid=561, Unknown=1, NotChecked=48, Total=702 [2022-12-14 10:17:51,052 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:17:51,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:17:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 10:17:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 10:17:51,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 10:17:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-12-14 10:17:51,057 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 29 [2022-12-14 10:17:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:17:51,057 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-12-14 10:17:51,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:17:51,058 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-12-14 10:17:51,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 10:17:51,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:17:51,058 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-12-14 10:17:51,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 10:17:51,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:17:51,260 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:17:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:17:51,261 INFO L85 PathProgramCache]: Analyzing trace with hash -698851176, now seen corresponding path program 3 times [2022-12-14 10:17:51,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:17:51,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303786971] [2022-12-14 10:17:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:17:51,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:17:51,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:17:51,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092861752] [2022-12-14 10:17:51,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:17:51,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:17:51,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:17:51,287 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:17:51,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:17:51,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:17:51,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:17:51,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:17:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:17:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:17:51,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:17:55,522 WARN L837 $PredicateComparison]: unable to prove that (or (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|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |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| 3) (* |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| 3)) 4) 0))) is different from false [2022-12-14 10:17:55,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:17:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303786971] [2022-12-14 10:17:55,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:17:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092861752] [2022-12-14 10:17:55,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092861752] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:17:55,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307291177] [2022-12-14 10:17:55,526 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:17:55,526 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:17:55,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:17:55,526 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:17:55,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:17:55,759 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 10:17:55,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:18:01,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1433#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:18:01,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:18:01,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:18:01,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-12-14 10:18:01,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447482433] [2022-12-14 10:18:01,243 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:18:01,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:18:01,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:18:01,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:18:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=481, Unknown=2, NotChecked=44, Total=600 [2022-12-14 10:18:01,245 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-12-14 10:18:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:01,382 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-12-14 10:18:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:18:01,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) Word has length 37 [2022-12-14 10:18:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:01,383 INFO L225 Difference]: With dead ends: 47 [2022-12-14 10:18:01,383 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 10:18:01,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=94, Invalid=610, Unknown=2, NotChecked=50, Total=756 [2022-12-14 10:18:01,384 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:01,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:18:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 10:18:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-12-14 10:18:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 10:18:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-12-14 10:18:01,389 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2022-12-14 10:18:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:01,389 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-12-14 10:18:01,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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) [2022-12-14 10:18:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-12-14 10:18:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 10:18:01,389 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:01,390 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 10:18:01,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 10:18:01,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 10:18:01,592 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:18:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash -795795011, now seen corresponding path program 2 times [2022-12-14 10:18:01,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:18:01,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310048697] [2022-12-14 10:18:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:01,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:18:01,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:18:01,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918770489] [2022-12-14 10:18:01,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:18:01,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:18:01,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:18:01,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:18:01,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:18:01,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 10:18:01,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:18:01,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:18:01,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:18:01,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:18:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 10:18:01,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:18:01,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310048697] [2022-12-14 10:18:01,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:18:01,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918770489] [2022-12-14 10:18:01,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918770489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:18:01,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228492567] [2022-12-14 10:18:01,765 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:18:01,765 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:18:01,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:18:01,765 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:18:01,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:18:02,004 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2022-12-14 10:18:02,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:18:02,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1813#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:18:02,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:18:02,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:18:02,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-12-14 10:18:02,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235639893] [2022-12-14 10:18:02,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 10:18:02,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:18:02,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:18:02,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:18:02,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:18:02,498 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:18:02,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:18:02,659 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2022-12-14 10:18:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:18:02,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 39 [2022-12-14 10:18:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:18:02,661 INFO L225 Difference]: With dead ends: 118 [2022-12-14 10:18:02,661 INFO L226 Difference]: Without dead ends: 113 [2022-12-14 10:18:02,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:18:02,662 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:18:02,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 132 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:18:02,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-14 10:18:02,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2022-12-14 10:18:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:18:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-12-14 10:18:02,670 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 39 [2022-12-14 10:18:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:18:02,671 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-12-14 10:18:02,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:18:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-12-14 10:18:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 10:18:02,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:18:02,672 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2022-12-14 10:18:02,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:18:02,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:18:02,874 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:18:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:18:02,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1312813826, now seen corresponding path program 4 times [2022-12-14 10:18:02,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:18:02,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120280529] [2022-12-14 10:18:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:18:02,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:18:02,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:18:02,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294479879] [2022-12-14 10:18:02,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:18:02,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:18:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:18:02,903 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:18:02,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:18:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:18:02,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 10:18:02,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 10:18:03,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:18:39,292 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 2)) 4) 0)))) is different from true [2022-12-14 10:18:57,813 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 2)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 10:19:05,851 WARN L837 $PredicateComparison]: unable to prove that (or (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|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |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| 3) (* |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| 3)) 4) 0))) is different from false [2022-12-14 10:19:07,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:19:07,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120280529] [2022-12-14 10:19:07,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:19:07,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294479879] [2022-12-14 10:19:07,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294479879] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:07,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788007053] [2022-12-14 10:19:07,876 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:19:07,876 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:19:07,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:19:07,876 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:19:07,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:19:08,107 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 10:19:08,150 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:19:11,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2316#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 10:19:11,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:19:11,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:19:11,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-12-14 10:19:11,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32010233] [2022-12-14 10:19:11,921 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:11,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 10:19:11,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:19:11,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 10:19:11,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=522, Unknown=8, NotChecked=144, Total=756 [2022-12-14 10:19:11,922 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 10:19:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:12,062 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-12-14 10:19:12,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:19:12,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2022-12-14 10:19:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:12,063 INFO L225 Difference]: With dead ends: 93 [2022-12-14 10:19:12,063 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 10:19:12,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=104, Invalid=656, Unknown=8, NotChecked=162, Total=930 [2022-12-14 10:19:12,064 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:12,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 131 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:19:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 10:19:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 10:19:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:19:12,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-12-14 10:19:12,072 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 45 [2022-12-14 10:19:12,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:12,072 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-12-14 10:19:12,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 10:19:12,072 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-12-14 10:19:12,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 10:19:12,073 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:12,073 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1] [2022-12-14 10:19:12,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 10:19:12,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:12,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:19:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1140847460, now seen corresponding path program 5 times [2022-12-14 10:19:12,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:19:12,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426872679] [2022-12-14 10:19:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:12,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:19:12,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:19:12,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172912882] [2022-12-14 10:19:12,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:19:12,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:12,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:12,300 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:12,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:19:12,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:19:12,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:19:12,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 10:19:12,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 23 proven. 64 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 10:19:12,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:16,640 WARN L837 $PredicateComparison]: unable to prove that (or (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|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |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| 3) (* |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| 3)) 4) 0))) is different from false [2022-12-14 10:19:16,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:19:16,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426872679] [2022-12-14 10:19:16,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:19:16,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172912882] [2022-12-14 10:19:16,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172912882] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:16,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1287837280] [2022-12-14 10:19:16,643 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:19:16,643 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:19:16,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:19:16,644 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:19:16,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:19:16,883 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 10:19:16,932 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:19:24,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2796#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:19:24,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:19:24,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:19:24,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-12-14 10:19:24,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097844352] [2022-12-14 10:19:24,542 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:24,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:19:24,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:19:24,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:19:24,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=572, Unknown=2, NotChecked=48, Total=702 [2022-12-14 10:19:24,543 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 10:19:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:24,741 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2022-12-14 10:19:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:19:24,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-12-14 10:19:24,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:24,742 INFO L225 Difference]: With dead ends: 93 [2022-12-14 10:19:24,742 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 10:19:24,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=101, Invalid=713, Unknown=2, NotChecked=54, Total=870 [2022-12-14 10:19:24,743 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:24,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 180 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:19:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 10:19:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 10:19:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:19:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-12-14 10:19:24,751 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 53 [2022-12-14 10:19:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:24,752 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-12-14 10:19:24,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 10:19:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-12-14 10:19:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 10:19:24,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:24,752 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1] [2022-12-14 10:19:24,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 10:19:24,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 10:19:24,954 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:19:24,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:24,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1237445686, now seen corresponding path program 6 times [2022-12-14 10:19:24,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:19:24,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635460252] [2022-12-14 10:19:24,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:24,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:19:24,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:19:24,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424224151] [2022-12-14 10:19:24,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:19:24,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:24,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:24,978 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:24,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:19:25,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:19:25,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:19:25,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 10:19:25,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 13 proven. 103 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 10:19:25,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:29,733 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |ULTIMATE.start_main_~k~0#1|) (= (+ (* 6 |ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 12) 36)) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 5)))) (not (= (mod (+ (* |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| 3) (* |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| 3)) 4) 0))) is different from false [2022-12-14 10:19:29,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:19:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635460252] [2022-12-14 10:19:29,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:19:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424224151] [2022-12-14 10:19:29,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424224151] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:19:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [224356753] [2022-12-14 10:19:29,737 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:19:29,737 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:19:29,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:19:29,737 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:19:29,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:19:29,952 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 10:19:29,990 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:19:33,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3426#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:19:33,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:19:33,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:19:33,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-12-14 10:19:33,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385261667] [2022-12-14 10:19:33,128 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:33,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:19:33,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:19:33,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:19:33,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=866, Unknown=1, NotChecked=60, Total=1056 [2022-12-14 10:19:33,129 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 10:19:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:19:33,355 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2022-12-14 10:19:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:19:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2022-12-14 10:19:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:19:33,356 INFO L225 Difference]: With dead ends: 93 [2022-12-14 10:19:33,357 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 10:19:33,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=150, Invalid=1043, Unknown=1, NotChecked=66, Total=1260 [2022-12-14 10:19:33,357 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:19:33,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 205 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:19:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 10:19:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 10:19:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:19:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-12-14 10:19:33,368 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 61 [2022-12-14 10:19:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:19:33,369 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-12-14 10:19:33,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 10:19:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-12-14 10:19:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 10:19:33,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:19:33,370 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2022-12-14 10:19:33,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 10:19:33,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:33,571 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:19:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:19:33,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1415549392, now seen corresponding path program 7 times [2022-12-14 10:19:33,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:19:33,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933341643] [2022-12-14 10:19:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:19:33,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:19:33,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:19:33,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813515917] [2022-12-14 10:19:33,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:19:33,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:19:33,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:19:33,578 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:19:33,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 10:19:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:19:33,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 10:19:33,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:19:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 36 proven. 113 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 10:19:33,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:20:16,134 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_126| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_126|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| 3)) 4) 0)))) is different from true [2022-12-14 10:20:34,179 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_126| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_126|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_147| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 10:20:42,215 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) |c_ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |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| 3) (* |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| 3)) 4) 0))) is different from false [2022-12-14 10:20:52,276 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 2 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4) 4)) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |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| 3) (* |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| 3)) 4) 0))) is different from false [2022-12-14 10:21:02,339 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 6) 9) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 3 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |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| 3) (* |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| 3)) 4) 0))) is different from false [2022-12-14 10:21:54,583 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 12) 36) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 6 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |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| 3) (* |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| 3)) 4) 0))) is different from false [2022-12-14 10:22:04,656 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 6)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 7) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 49 (* |c_ULTIMATE.start_main_~y~0#1| 14)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|) (* 7 |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |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| 3) (* |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| 3)) 4) 0))) is different from false [2022-12-14 10:22:06,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:22:06,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933341643] [2022-12-14 10:22:06,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:22:06,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813515917] [2022-12-14 10:22:06,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813515917] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:06,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567198667] [2022-12-14 10:22:06,676 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:22:06,676 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:06,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:06,677 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:06,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:06,870 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 10:22:06,912 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:07,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4108#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:07,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:07,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:22:07,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-12-14 10:22:07,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683439330] [2022-12-14 10:22:07,679 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:07,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 10:22:07,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:07,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 10:22:07,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=761, Unknown=17, NotChecked=434, Total=1332 [2022-12-14 10:22:07,680 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:22:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:09,932 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-12-14 10:22:09,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:22:09,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2022-12-14 10:22:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:09,933 INFO L225 Difference]: With dead ends: 93 [2022-12-14 10:22:09,933 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 10:22:09,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 63.2s TimeCoverageRelationStatistics Valid=144, Invalid=922, Unknown=18, NotChecked=476, Total=1560 [2022-12-14 10:22:09,934 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:09,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 248 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:22:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 10:22:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 10:22:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:22:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-12-14 10:22:09,940 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 69 [2022-12-14 10:22:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:09,940 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-12-14 10:22:09,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:22:09,941 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-12-14 10:22:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 10:22:09,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:09,941 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1] [2022-12-14 10:22:09,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 10:22:10,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 10:22:10,143 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:10,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1095565974, now seen corresponding path program 8 times [2022-12-14 10:22:10,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:10,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019310003] [2022-12-14 10:22:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:10,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:10,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:22:10,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036137068] [2022-12-14 10:22:10,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:22:10,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:10,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:22:10,154 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:22:10,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 10:22:10,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 10:22:10,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:22:10,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 10:22:10,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 32 proven. 154 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-14 10:22:10,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:10,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:22:10,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019310003] [2022-12-14 10:22:10,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:22:10,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036137068] [2022-12-14 10:22:10,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036137068] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [636709123] [2022-12-14 10:22:10,617 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:22:10,617 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:10,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:10,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:10,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:10,842 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 10:22:10,885 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:13,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4662#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:13,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:13,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:22:13,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-12-14 10:22:13,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525237208] [2022-12-14 10:22:13,536 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:13,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:22:13,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:22:13,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-12-14 10:22:13,537 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 10:22:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:13,824 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2022-12-14 10:22:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:22:13,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2022-12-14 10:22:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:13,825 INFO L225 Difference]: With dead ends: 93 [2022-12-14 10:22:13,825 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 10:22:13,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-12-14 10:22:13,825 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:13,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 315 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:22:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 10:22:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 10:22:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:22:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-12-14 10:22:13,836 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 77 [2022-12-14 10:22:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:13,836 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-12-14 10:22:13,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 10:22:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-12-14 10:22:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 10:22:13,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:13,837 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1] [2022-12-14 10:22:13,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 10:22:14,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 10:22:14,039 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:14,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:14,040 INFO L85 PathProgramCache]: Analyzing trace with hash 241815804, now seen corresponding path program 9 times [2022-12-14 10:22:14,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:14,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883641177] [2022-12-14 10:22:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:14,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:14,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:22:14,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500038910] [2022-12-14 10:22:14,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:22:14,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:14,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:22:14,068 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:22:14,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 10:22:14,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:22:14,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:22:14,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 10:22:14,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:22:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 19 proven. 208 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 10:22:14,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:22:14,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:22:14,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883641177] [2022-12-14 10:22:14,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:22:14,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500038910] [2022-12-14 10:22:14,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500038910] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:22:14,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020007986] [2022-12-14 10:22:14,540 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:22:14,540 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:22:14,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:22:14,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:22:14,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:22:14,740 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 10:22:14,786 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:22:16,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5241#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:22:16,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:22:16,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:22:16,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-12-14 10:22:16,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540514380] [2022-12-14 10:22:16,534 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 10:22:16,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:22:16,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:22:16,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:22:16,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:22:16,536 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:22:16,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:22:16,847 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2022-12-14 10:22:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 10:22:16,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2022-12-14 10:22:16,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:22:16,849 INFO L225 Difference]: With dead ends: 95 [2022-12-14 10:22:16,849 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 10:22:16,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:22:16,850 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:22:16,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 346 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:22:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 10:22:16,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-12-14 10:22:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 10:22:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-12-14 10:22:16,861 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2022-12-14 10:22:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:22:16,861 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-12-14 10:22:16,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:22:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-12-14 10:22:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 10:22:16,863 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:22:16,863 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 10:22:16,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 10:22:17,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 10:22:17,065 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:22:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:22:17,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1242040609, now seen corresponding path program 3 times [2022-12-14 10:22:17,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:22:17,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230306036] [2022-12-14 10:22:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:22:17,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:22:17,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 10:22:17,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803688752] [2022-12-14 10:22:17,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:22:17,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:22:17,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:22:17,090 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:22:17,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 10:22:17,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:22:17,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-12-14 10:22:17,311 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 10:22:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:22:17,380 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 10:22:17,380 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 10:22:17,381 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 10:22:17,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 10:22:17,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 10:22:17,590 INFO L445 BasicCegarLoop]: Path program histogram: [9, 3, 1, 1, 1, 1] [2022-12-14 10:22:17,592 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 10:22:17,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 10:22:17 BoogieIcfgContainer [2022-12-14 10:22:17,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 10:22:17,617 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 10:22:17,617 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 10:22:17,618 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 10:22:17,618 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:16:37" (3/4) ... [2022-12-14 10:22:17,619 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 10:22:17,652 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 10:22:17,653 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 10:22:17,653 INFO L158 Benchmark]: Toolchain (without parser) took 340471.86ms. Allocated memory was 119.5MB in the beginning and 146.8MB in the end (delta: 27.3MB). Free memory was 85.5MB in the beginning and 54.8MB in the end (delta: 30.6MB). Peak memory consumption was 58.3MB. Max. memory is 16.1GB. [2022-12-14 10:22:17,653 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 119.5MB. Free memory is still 95.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:22:17,653 INFO L158 Benchmark]: CACSL2BoogieTranslator took 156.73ms. Allocated memory is still 119.5MB. Free memory was 85.1MB in the beginning and 75.0MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:22:17,653 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.33ms. Allocated memory is still 119.5MB. Free memory was 75.0MB in the beginning and 73.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:22:17,654 INFO L158 Benchmark]: Boogie Preprocessor took 13.26ms. Allocated memory is still 119.5MB. Free memory was 73.3MB in the beginning and 72.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 10:22:17,654 INFO L158 Benchmark]: RCFGBuilder took 229.38ms. Allocated memory is still 119.5MB. Free memory was 72.3MB in the beginning and 61.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:22:17,654 INFO L158 Benchmark]: TraceAbstraction took 340009.87ms. Allocated memory was 119.5MB in the beginning and 146.8MB in the end (delta: 27.3MB). Free memory was 61.1MB in the beginning and 59.0MB in the end (delta: 2.0MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. [2022-12-14 10:22:17,654 INFO L158 Benchmark]: Witness Printer took 35.26ms. Allocated memory is still 146.8MB. Free memory was 59.0MB in the beginning and 54.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 10:22:17,655 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 119.5MB. Free memory is still 95.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 156.73ms. Allocated memory is still 119.5MB. Free memory was 85.1MB in the beginning and 75.0MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.33ms. Allocated memory is still 119.5MB. Free memory was 75.0MB in the beginning and 73.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 13.26ms. Allocated memory is still 119.5MB. Free memory was 73.3MB in the beginning and 72.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 229.38ms. Allocated memory is still 119.5MB. Free memory was 72.3MB in the beginning and 61.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 340009.87ms. Allocated memory was 119.5MB in the beginning and 146.8MB in the end (delta: 27.3MB). Free memory was 61.1MB in the beginning and 59.0MB in the end (delta: 2.0MB). Peak memory consumption was 31.1MB. Max. memory is 16.1GB. * Witness Printer took 35.26ms. Allocated memory is still 146.8MB. Free memory was 59.0MB in the beginning and 54.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [c=0, counter=0, k=11, x=0, y=0] [L27] EXPR counter++ VAL [c=0, counter=1, counter++=0, k=11, x=0, y=0] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=0, counter=1, k=11, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=1, counter=1, k=11, x=1, y=1] [L27] EXPR counter++ VAL [c=1, counter=2, counter++=1, k=11, x=1, y=1] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=1, counter=2, k=11, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=2, counter=2, k=11, x=9, y=2] [L27] EXPR counter++ VAL [c=2, counter=3, counter++=2, k=11, x=9, y=2] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=2, counter=3, k=11, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=3, counter=3, k=11, x=36, y=3] [L27] EXPR counter++ VAL [c=3, counter=4, counter++=3, k=11, x=36, y=3] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=3, counter=4, k=11, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=4, counter=4, k=11, x=100, y=4] [L27] EXPR counter++ VAL [c=4, counter=5, counter++=4, k=11, x=100, y=4] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=4, counter=5, k=11, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=5, counter=5, k=11, x=225, y=5] [L27] EXPR counter++ VAL [c=5, counter=6, counter++=5, k=11, x=225, y=5] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=6] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=5, counter=6, k=11, x=225, y=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=6, counter=6, k=11, x=441, y=6] [L27] EXPR counter++ VAL [c=6, counter=7, counter++=6, k=11, x=441, y=6] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=7] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=6, counter=7, k=11, x=441, y=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=7, counter=7, k=11, x=784, y=7] [L27] EXPR counter++ VAL [c=7, counter=8, counter++=7, k=11, x=784, y=7] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=8] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=7, counter=8, k=11, x=784, y=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=8, counter=8, k=11, x=1296, y=8] [L27] EXPR counter++ VAL [c=8, counter=9, counter++=8, k=11, x=1296, y=8] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=9] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=8, counter=9, k=11, x=1296, y=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=9, counter=9, k=11, x=2025, y=9] [L27] EXPR counter++ VAL [c=9, counter=10, counter++=9, k=11, x=2025, y=9] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=10] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=9, counter=10, k=11, x=2025, y=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=10, counter=10, k=11, x=3025, y=10] [L27] EXPR counter++ VAL [c=10, counter=11, counter++=10, k=11, x=3025, y=10] [L27] COND FALSE !(counter++<10) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, counter=11] [L10] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L12] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 339.9s, OverallIterations: 16, TraceHistogramMax: 11, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 175 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 170 mSDsluCounter, 2011 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1712 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2747 IncrementalHoareTripleChecker+Invalid, 2768 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 299 mSDtfsCounter, 2747 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1419 GetRequests, 1080 SyntacticMatches, 1 SemanticMatches, 338 ConstructedPredicates, 17 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 142.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=15, InterpolantAutomatonStates: 169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 35 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 298.7s InterpolantComputationTime, 666 NumberOfCodeBlocks, 666 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 617 ConstructedInterpolants, 0 QuantifiedInterpolants, 2667 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1892 ConjunctsInSsa, 376 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 745/1574 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 10:22:17,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8a8be2-05b9-4dfa-9d26-86e0e0df1ce9/bin/utaipan-gh47qXpMRh/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE