./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/nsqm.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/nsqm.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI --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 b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 --- 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-5e519f3 [2022-11-03 03:29:31,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:29:31,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:29:31,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:29:31,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:29:31,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:29:31,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:29:31,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:29:31,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:29:31,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:29:31,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:29:31,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:29:31,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:29:31,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:29:31,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:29:31,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:29:31,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:29:31,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:29:31,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:29:32,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:29:32,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:29:32,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:29:32,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:29:32,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:29:32,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:29:32,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:29:32,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:29:32,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:29:32,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:29:32,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:29:32,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:29:32,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:29:32,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:29:32,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:29:32,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:29:32,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:29:32,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:29:32,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:29:32,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:29:32,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:29:32,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:29:32,040 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:29:32,081 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:29:32,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:29:32,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:29:32,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:29:32,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:29:32,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:29:32,084 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:29:32,084 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:29:32,084 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:29:32,084 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:29:32,085 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:29:32,088 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:29:32,088 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:29:32,088 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:29:32,088 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:29:32,089 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:29:32,089 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:29:32,089 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:29:32,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:29:32,090 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:29:32,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:29:32,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:29:32,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:29:32,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:29:32,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:29:32,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:29:32,094 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:29:32,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:29:32,095 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:29:32,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:29:32,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:29:32,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:29:32,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:32,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:29:32,096 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:29:32,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:29:32,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:29:32,098 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:29:32,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:29:32,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:29:32,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:29:32,099 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_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b64d5f0150faeb5d8c80a790953ff0d0f860fa8f91611b25d82154854354bbd0 [2022-11-03 03:29:32,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:29:32,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:29:32,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:29:32,453 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:29:32,454 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:29:32,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/nsqm.c [2022-11-03 03:29:32,544 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/data/c5a113c3f/0a81bb5167874446aeded37763d2b911/FLAG78f083fb8 [2022-11-03 03:29:32,981 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:29:32,982 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/sv-benchmarks/c/array-fpi/nsqm.c [2022-11-03 03:29:32,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/data/c5a113c3f/0a81bb5167874446aeded37763d2b911/FLAG78f083fb8 [2022-11-03 03:29:33,375 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/data/c5a113c3f/0a81bb5167874446aeded37763d2b911 [2022-11-03 03:29:33,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:29:33,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:29:33,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:33,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:29:33,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:29:33,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121adbda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33, skipping insertion in model container [2022-11-03 03:29:33,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:29:33,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:29:33,654 WARN L230 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_7debd991-814e-491d-b7f4-696a3b69dd1d/sv-benchmarks/c/array-fpi/nsqm.c[587,600] [2022-11-03 03:29:33,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:33,694 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:29:33,704 WARN L230 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_7debd991-814e-491d-b7f4-696a3b69dd1d/sv-benchmarks/c/array-fpi/nsqm.c[587,600] [2022-11-03 03:29:33,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:33,725 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:29:33,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33 WrapperNode [2022-11-03 03:29:33,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:33,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:33,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:29:33,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:29:33,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,772 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-11-03 03:29:33,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:33,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:29:33,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:29:33,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:29:33,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,797 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:29:33,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:29:33,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:29:33,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:29:33,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (1/1) ... [2022-11-03 03:29:33,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:33,835 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:29:33,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:29:33,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:29:33,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:29:33,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:29:33,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:29:33,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:29:33,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:29:33,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:29:33,967 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:29:33,969 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:29:34,132 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:29:34,176 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:29:34,177 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 03:29:34,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:34 BoogieIcfgContainer [2022-11-03 03:29:34,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:29:34,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:29:34,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:29:34,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:29:34,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:29:33" (1/3) ... [2022-11-03 03:29:34,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3d12a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:34, skipping insertion in model container [2022-11-03 03:29:34,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:33" (2/3) ... [2022-11-03 03:29:34,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3d12a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:34, skipping insertion in model container [2022-11-03 03:29:34,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:34" (3/3) ... [2022-11-03 03:29:34,190 INFO L112 eAbstractionObserver]: Analyzing ICFG nsqm.c [2022-11-03 03:29:34,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:29:34,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:29:34,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:29:34,265 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;@5b175e89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:29:34,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:29:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 03:29:34,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:34,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:34,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:34,283 INFO L85 PathProgramCache]: Analyzing trace with hash -735732333, now seen corresponding path program 1 times [2022-11-03 03:29:34,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:34,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372364489] [2022-11-03 03:29:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:34,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:34,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:34,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218492676] [2022-11-03 03:29:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:34,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:34,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:34,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:34,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:29:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:34,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:29:34,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:34,763 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 03:29:34,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 03:29:34,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:29:34,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:29:34,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 03:29:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:35,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:35,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:35,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372364489] [2022-11-03 03:29:35,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:35,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218492676] [2022-11-03 03:29:35,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218492676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:35,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:35,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:35,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463081774] [2022-11-03 03:29:35,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:35,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:35,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:35,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:35,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:35,082 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:35,257 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-11-03 03:29:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 03:29:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:35,268 INFO L225 Difference]: With dead ends: 35 [2022-11-03 03:29:35,269 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 03:29:35,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:29:35,275 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:35,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 03:29:35,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 13. [2022-11-03 03:29:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2022-11-03 03:29:35,310 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2022-11-03 03:29:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:35,310 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2022-11-03 03:29:35,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2022-11-03 03:29:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 03:29:35,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:35,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:35,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:35,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:35,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:35,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1337635293, now seen corresponding path program 1 times [2022-11-03 03:29:35,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:35,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690527588] [2022-11-03 03:29:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:35,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:35,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:35,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233032936] [2022-11-03 03:29:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:35,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:35,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:35,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:35,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:29:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:35,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:29:35,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:35,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:35,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:35,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690527588] [2022-11-03 03:29:35,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233032936] [2022-11-03 03:29:35,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233032936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:35,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:35,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:35,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552399619] [2022-11-03 03:29:35,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:35,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:35,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:35,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:35,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:35,695 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:35,801 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2022-11-03 03:29:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:35,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 03:29:35,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:35,802 INFO L225 Difference]: With dead ends: 25 [2022-11-03 03:29:35,802 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 03:29:35,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:35,804 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:35,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 03:29:35,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2022-11-03 03:29:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-03 03:29:35,809 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2022-11-03 03:29:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:35,810 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-03 03:29:35,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-03 03:29:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 03:29:35,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:35,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:35,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:36,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 03:29:36,030 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:36,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1611921030, now seen corresponding path program 1 times [2022-11-03 03:29:36,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:36,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741053223] [2022-11-03 03:29:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:36,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:36,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:36,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15454459] [2022-11-03 03:29:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:36,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:36,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:36,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:36,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:29:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:36,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:29:36,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:36,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:36,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:36,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741053223] [2022-11-03 03:29:36,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:36,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15454459] [2022-11-03 03:29:36,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15454459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:36,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1069063631] [2022-11-03 03:29:36,253 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:29:36,253 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:36,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:36,262 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:36,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:36,489 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:29:36,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:29:36,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:29:36,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:36,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 107 [2022-11-03 03:29:36,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:36,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 31 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 03:29:37,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:37,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:37,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,227 INFO L356 Elim1Store]: treesize reduction 241, result has 12.4 percent of original size [2022-11-03 03:29:37,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 42 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 43 case distinctions, treesize of input 526 treesize of output 538 [2022-11-03 03:29:37,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:29:37,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:37,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= ~N~0 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:37,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:37,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:37,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-03 03:29:37,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873152134] [2022-11-03 03:29:37,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:37,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:29:37,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:37,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:29:37,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:29:37,973 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:38,096 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-03 03:29:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:29:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 03:29:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:38,097 INFO L225 Difference]: With dead ends: 29 [2022-11-03 03:29:38,097 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 03:29:38,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:29:38,099 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:38,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 03:29:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-11-03 03:29:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-03 03:29:38,104 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2022-11-03 03:29:38,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:38,104 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-03 03:29:38,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-03 03:29:38,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:29:38,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:38,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:38,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:38,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-03 03:29:38,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:38,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1565286172, now seen corresponding path program 1 times [2022-11-03 03:29:38,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:38,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344382952] [2022-11-03 03:29:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:38,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:38,368 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:38,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686897251] [2022-11-03 03:29:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:38,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:38,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:38,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:38,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:29:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:38,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:29:38,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:38,538 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 03:29:38,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 03:29:38,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:29:38,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:29:38,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:38,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 7 [2022-11-03 03:29:38,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 03:29:38,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:29:38,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:38,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-03 03:29:38,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 03:29:38,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:38,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:29:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:38,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:39,181 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_115 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_115) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ c_~N~0 1))) is different from false [2022-11-03 03:29:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-03 03:29:39,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:39,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344382952] [2022-11-03 03:29:39,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:39,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686897251] [2022-11-03 03:29:39,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686897251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:39,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344100571] [2022-11-03 03:29:39,210 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:29:39,210 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:39,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:39,211 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:39,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:39,420 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:29:39,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:29:39,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:29:39,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 107 [2022-11-03 03:29:39,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:39,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 168 [2022-11-03 03:29:39,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:39,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:39,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:39,853 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-11-03 03:29:39,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 564 treesize of output 532 [2022-11-03 03:29:40,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:40,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:29:40,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:40,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:40,039 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:29:40,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:29:40,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:40,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:40,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:40,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:40,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:40,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:40,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:40,133 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 03:29:40,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 193 [2022-11-03 03:29:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:40,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:40,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:40,196 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:29:40,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:29:40,223 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:40,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '369#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:40,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:40,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:40,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-03 03:29:40,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993994124] [2022-11-03 03:29:40,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:40,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:29:40,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:29:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=170, Unknown=2, NotChecked=26, Total=240 [2022-11-03 03:29:40,590 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:40,772 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-11-03 03:29:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:29:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 03:29:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:40,773 INFO L225 Difference]: With dead ends: 32 [2022-11-03 03:29:40,773 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 03:29:40,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=245, Unknown=2, NotChecked=32, Total=342 [2022-11-03 03:29:40,775 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:40,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-03 03:29:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 03:29:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 17. [2022-11-03 03:29:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-03 03:29:40,781 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2022-11-03 03:29:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:40,781 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-03 03:29:40,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-03 03:29:40,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:29:40,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:40,783 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:40,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:40,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:40,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash -978676906, now seen corresponding path program 1 times [2022-11-03 03:29:41,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:41,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143939124] [2022-11-03 03:29:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:41,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:41,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:41,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211580781] [2022-11-03 03:29:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:41,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:41,027 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:41,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:29:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:29:41,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:41,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:41,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:41,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143939124] [2022-11-03 03:29:41,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:41,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211580781] [2022-11-03 03:29:41,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211580781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:41,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:41,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:29:41,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351674430] [2022-11-03 03:29:41,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:41,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:29:41,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:41,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:29:41,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:41,142 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:41,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:41,213 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-11-03 03:29:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:41,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 03:29:41,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:41,214 INFO L225 Difference]: With dead ends: 31 [2022-11-03 03:29:41,215 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 03:29:41,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:41,216 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:41,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 03:29:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2022-11-03 03:29:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-03 03:29:41,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2022-11-03 03:29:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:41,229 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-03 03:29:41,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-03 03:29:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:29:41,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:41,231 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:41,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:41,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:41,444 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:41,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:41,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1274461626, now seen corresponding path program 2 times [2022-11-03 03:29:41,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:41,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111732299] [2022-11-03 03:29:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:41,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:41,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739757352] [2022-11-03 03:29:41,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:29:41,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:41,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:41,475 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:41,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:29:41,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:29:41,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:41,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:29:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:41,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:41,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:41,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111732299] [2022-11-03 03:29:41,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:41,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739757352] [2022-11-03 03:29:41,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739757352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:41,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628367569] [2022-11-03 03:29:41,663 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:29:41,663 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:41,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:41,664 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:41,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:41,799 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:29:41,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:29:41,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:29:41,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:41,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 107 [2022-11-03 03:29:41,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:41,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 168 [2022-11-03 03:29:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:42,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:42,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,157 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-11-03 03:29:42,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 564 treesize of output 532 [2022-11-03 03:29:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:29:42,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,306 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:29:42,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 03:29:42,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:42,443 INFO L356 Elim1Store]: treesize reduction 249, result has 12.0 percent of original size [2022-11-03 03:29:42,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 148 treesize of output 184 [2022-11-03 03:29:42,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:42,514 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:29:42,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:29:42,539 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:42,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '621#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:42,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:42,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:42,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-03 03:29:42,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135478555] [2022-11-03 03:29:42,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:42,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:29:42,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:42,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:29:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:29:42,868 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:42,986 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-03 03:29:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:42,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 03:29:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:42,987 INFO L225 Difference]: With dead ends: 33 [2022-11-03 03:29:42,988 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 03:29:42,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:29:42,989 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:42,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 18 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 03:29:42,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2022-11-03 03:29:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-03 03:29:42,994 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2022-11-03 03:29:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:42,994 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-03 03:29:42,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-03 03:29:42,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:29:42,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:42,995 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:43,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 03:29:43,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:29:43,201 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:43,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1361538371, now seen corresponding path program 3 times [2022-11-03 03:29:43,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:43,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291367691] [2022-11-03 03:29:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:43,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:43,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:43,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048748152] [2022-11-03 03:29:43,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:29:43,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:43,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:43,231 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:43,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:29:43,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:29:43,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:43,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:29:43,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:43,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:43,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:43,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291367691] [2022-11-03 03:29:43,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:43,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048748152] [2022-11-03 03:29:43,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048748152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:43,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1539608103] [2022-11-03 03:29:43,414 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:29:43,414 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:43,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:43,414 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:43,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:43,545 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:29:43,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:29:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 107 [2022-11-03 03:29:43,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:29:43,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 168 [2022-11-03 03:29:43,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:43,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:43,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,922 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-11-03 03:29:43,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 564 treesize of output 532 [2022-11-03 03:29:44,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:29:44,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:44,078 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:29:44,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:29:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:44,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:44,164 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 03:29:44,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 193 [2022-11-03 03:29:44,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:44,235 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:29:44,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:29:44,261 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:44,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '765#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:44,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:44,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:44,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-03 03:29:44,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125736664] [2022-11-03 03:29:44,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:29:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:44,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:29:44,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:29:44,590 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:44,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:44,732 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-03 03:29:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:29:44,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 03:29:44,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:44,734 INFO L225 Difference]: With dead ends: 37 [2022-11-03 03:29:44,734 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 03:29:44,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:29:44,735 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:44,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 03:29:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 17. [2022-11-03 03:29:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-03 03:29:44,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2022-11-03 03:29:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:44,745 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-03 03:29:44,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-03 03:29:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:29:44,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:44,746 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:44,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-03 03:29:44,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:44,959 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:44,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:44,959 INFO L85 PathProgramCache]: Analyzing trace with hash -746752909, now seen corresponding path program 4 times [2022-11-03 03:29:44,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:44,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819210744] [2022-11-03 03:29:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:44,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:44,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:44,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426902110] [2022-11-03 03:29:44,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:29:44,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:44,994 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:45,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:29:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:45,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:29:45,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:45,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:29:45,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:45,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2022-11-03 03:29:45,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:29:45,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:29:45,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:29:45,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:29:45,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:29:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:45,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:45,762 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_253 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_253) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ c_~N~0 1))) is different from false [2022-11-03 03:29:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-03 03:29:45,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819210744] [2022-11-03 03:29:45,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:29:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426902110] [2022-11-03 03:29:45,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426902110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364655667] [2022-11-03 03:29:45,788 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:29:45,789 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:45,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:45,789 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:45,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:45,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:45,877 INFO L356 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2022-11-03 03:29:45,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 125 [2022-11-03 03:29:46,023 INFO L356 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-03 03:29:46,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-03 03:29:46,175 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:29:46,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:29:46,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 168 [2022-11-03 03:29:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:46,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,519 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-11-03 03:29:46,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 593 treesize of output 534 [2022-11-03 03:29:46,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:29:46,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:46,709 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:29:46,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:29:46,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:46,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:46,756 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:29:46,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:29:46,774 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:47,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '929#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:47,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:47,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:47,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-11-03 03:29:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120829912] [2022-11-03 03:29:47,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:47,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:29:47,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:29:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=222, Unknown=1, NotChecked=30, Total=306 [2022-11-03 03:29:47,252 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:47,540 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-03 03:29:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:29:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:29:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:47,541 INFO L225 Difference]: With dead ends: 41 [2022-11-03 03:29:47,542 INFO L226 Difference]: Without dead ends: 39 [2022-11-03 03:29:47,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=449, Unknown=1, NotChecked=44, Total=600 [2022-11-03 03:29:47,543 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:47,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 24 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 50 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-11-03 03:29:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-03 03:29:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 19. [2022-11-03 03:29:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-03 03:29:47,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2022-11-03 03:29:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:47,548 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-03 03:29:47,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-03 03:29:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 03:29:47,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:47,553 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:47,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:47,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 03:29:47,759 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:47,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash 985561389, now seen corresponding path program 1 times [2022-11-03 03:29:47,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:47,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471818718] [2022-11-03 03:29:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:47,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:47,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:29:47,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359883262] [2022-11-03 03:29:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:47,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:47,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:47,790 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:47,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:29:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 03:29:47,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:47,953 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-03 03:29:47,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 58 [2022-11-03 03:29:47,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 35 [2022-11-03 03:29:47,994 INFO L356 Elim1Store]: treesize reduction 34, result has 34.6 percent of original size [2022-11-03 03:29:47,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 70 [2022-11-03 03:29:48,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:29:48,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 87 [2022-11-03 03:29:48,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:48,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2022-11-03 03:29:48,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 34 [2022-11-03 03:29:48,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:48,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2022-11-03 03:29:48,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 03:29:48,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:29:48,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:48,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:48,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-03 03:29:48,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 03:29:48,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:48,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-11-03 03:29:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:48,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:02,651 WARN L234 SmtUtils]: Spent 11.27s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:30:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:02,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:02,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471818718] [2022-11-03 03:30:02,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:30:02,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359883262] [2022-11-03 03:30:02,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359883262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:02,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495367211] [2022-11-03 03:30:02,683 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:30:02,684 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:02,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:02,684 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:02,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:02,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:02,824 INFO L356 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2022-11-03 03:30:02,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 125 [2022-11-03 03:30:02,978 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:30:02,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:30:02,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:30:03,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:03,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 168 [2022-11-03 03:30:03,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:03,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,328 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-11-03 03:30:03,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 593 treesize of output 534 [2022-11-03 03:30:03,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:30:03,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:03,493 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:30:03,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 03:30:03,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:03,544 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:30:03,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:30:03,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:03,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:03,600 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:30:03,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:30:03,685 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:04,250 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1120#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:30:04,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:04,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:30:04,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-03 03:30:04,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976268468] [2022-11-03 03:30:04,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:04,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 03:30:04,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:04,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 03:30:04,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=355, Unknown=2, NotChecked=0, Total=420 [2022-11-03 03:30:04,252 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:04,712 WARN L234 SmtUtils]: Spent 59.88s on a formula simplification. DAG size of input: 64 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:31:05,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:05,005 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-11-03 03:31:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:31:05,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 03:31:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:05,006 INFO L225 Difference]: With dead ends: 33 [2022-11-03 03:31:05,006 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 03:31:05,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 75.1s TimeCoverageRelationStatistics Valid=131, Invalid=568, Unknown=3, NotChecked=0, Total=702 [2022-11-03 03:31:05,007 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:05,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 68 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-03 03:31:05,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 03:31:05,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-11-03 03:31:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-03 03:31:05,014 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 12 [2022-11-03 03:31:05,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:05,014 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-03 03:31:05,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:05,015 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-03 03:31:05,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:31:05,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:05,015 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:05,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:05,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:05,225 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:05,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:05,226 INFO L85 PathProgramCache]: Analyzing trace with hash -522629517, now seen corresponding path program 5 times [2022-11-03 03:31:05,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:05,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141350336] [2022-11-03 03:31:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:05,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:05,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:31:05,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375507886] [2022-11-03 03:31:05,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:31:05,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:05,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:05,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:05,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:31:05,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:31:05,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:31:05,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:31:05,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:31:05,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:31:05,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:05,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141350336] [2022-11-03 03:31:05,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:31:05,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375507886] [2022-11-03 03:31:05,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375507886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:05,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079651269] [2022-11-03 03:31:05,730 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:31:05,731 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:05,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:05,731 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:05,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:05,879 INFO L356 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-03 03:31:05,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-03 03:31:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:05,996 INFO L356 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2022-11-03 03:31:05,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 125 [2022-11-03 03:31:06,170 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:31:06,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:31:06,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 31 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 03:31:06,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:06,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:06,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,558 INFO L356 Elim1Store]: treesize reduction 246, result has 10.5 percent of original size [2022-11-03 03:31:06,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 42 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 43 case distinctions, treesize of input 528 treesize of output 533 [2022-11-03 03:31:06,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:31:06,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:06,716 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:06,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:31:06,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:06,806 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 03:31:06,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 193 [2022-11-03 03:31:06,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:06,859 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:06,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:31:06,876 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:07,226 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1307#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:31:07,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:07,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:31:07,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-03 03:31:07,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880570161] [2022-11-03 03:31:07,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:07,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:31:07,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:31:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:31:07,229 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:07,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:07,476 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-11-03 03:31:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:31:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:31:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:07,478 INFO L225 Difference]: With dead ends: 54 [2022-11-03 03:31:07,478 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 03:31:07,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:31:07,479 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:07,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 25 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:07,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 03:31:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 21. [2022-11-03 03:31:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-03 03:31:07,485 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2022-11-03 03:31:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:07,489 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-03 03:31:07,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-03 03:31:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 03:31:07,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:07,490 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:07,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:07,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:31:07,696 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:07,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1419825270, now seen corresponding path program 2 times [2022-11-03 03:31:07,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:07,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713539025] [2022-11-03 03:31:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:07,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:07,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:31:07,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314645661] [2022-11-03 03:31:07,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:31:07,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:07,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:07,716 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:07,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:31:07,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:31:07,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:31:07,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 03:31:07,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:08,017 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-03 03:31:08,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 58 [2022-11-03 03:31:08,062 INFO L356 Elim1Store]: treesize reduction 39, result has 31.6 percent of original size [2022-11-03 03:31:08,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 75 [2022-11-03 03:31:08,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:31:08,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:31:08,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-03 03:31:08,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 03:31:08,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:31:08,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2022-11-03 03:31:08,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-11-03 03:31:08,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 26 [2022-11-03 03:31:08,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 03:31:08,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 03:31:08,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 139 [2022-11-03 03:31:08,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:08,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 214 [2022-11-03 03:31:08,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:08,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-03 03:31:08,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 30 [2022-11-03 03:31:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:08,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:11,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:11,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713539025] [2022-11-03 03:31:11,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:31:11,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314645661] [2022-11-03 03:31:11,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314645661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:11,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179895001] [2022-11-03 03:31:11,052 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:31:11,052 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:11,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:11,053 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:11,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:11,224 INFO L356 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-03 03:31:11,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-03 03:31:11,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,334 INFO L356 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2022-11-03 03:31:11,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 125 [2022-11-03 03:31:11,503 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:31:11,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:31:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 31 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 03:31:11,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:11,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:11,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:11,833 INFO L356 Elim1Store]: treesize reduction 241, result has 12.4 percent of original size [2022-11-03 03:31:11,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 42 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 43 case distinctions, treesize of input 528 treesize of output 538 [2022-11-03 03:31:12,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:12,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:31:12,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:12,037 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:12,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 03:31:12,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:12,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:12,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:12,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:12,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:12,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:12,181 INFO L356 Elim1Store]: treesize reduction 249, result has 12.0 percent of original size [2022-11-03 03:31:12,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 148 treesize of output 184 [2022-11-03 03:31:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:12,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:12,238 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:12,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:31:12,411 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:12,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1540#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:31:12,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:12,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:31:12,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-11-03 03:31:12,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18843304] [2022-11-03 03:31:12,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:12,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 03:31:12,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:12,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 03:31:12,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=512, Unknown=1, NotChecked=0, Total=600 [2022-11-03 03:31:12,964 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:13,376 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-11-03 03:31:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:31:13,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 03:31:13,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:13,381 INFO L225 Difference]: With dead ends: 36 [2022-11-03 03:31:13,381 INFO L226 Difference]: Without dead ends: 34 [2022-11-03 03:31:13,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=112, Invalid=643, Unknown=1, NotChecked=0, Total=756 [2022-11-03 03:31:13,383 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:13,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-11-03 03:31:13,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-03 03:31:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-11-03 03:31:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-11-03 03:31:13,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2022-11-03 03:31:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:13,393 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-11-03 03:31:13,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-11-03 03:31:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 03:31:13,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:13,394 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:13,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:13,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:13,600 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:13,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:13,600 INFO L85 PathProgramCache]: Analyzing trace with hash 916648218, now seen corresponding path program 6 times [2022-11-03 03:31:13,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:13,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206680819] [2022-11-03 03:31:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:13,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:13,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:31:13,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264059632] [2022-11-03 03:31:13,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:31:13,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:13,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:13,623 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:13,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:31:13,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:31:13,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:31:13,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:31:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:13,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:13,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:13,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206680819] [2022-11-03 03:31:13,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:31:13,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264059632] [2022-11-03 03:31:13,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264059632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:13,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788736153] [2022-11-03 03:31:13,917 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:31:13,917 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:13,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:13,918 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:13,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:13,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,006 INFO L356 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2022-11-03 03:31:14,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 125 [2022-11-03 03:31:14,136 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:31:14,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:31:14,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:31:14,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 31 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 03:31:14,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:14,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:14,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,477 INFO L356 Elim1Store]: treesize reduction 246, result has 10.5 percent of original size [2022-11-03 03:31:14,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 42 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 43 case distinctions, treesize of input 526 treesize of output 533 [2022-11-03 03:31:14,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:31:14,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:14,668 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:14,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:31:14,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:14,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:14,761 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 03:31:14,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 193 [2022-11-03 03:31:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:14,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:14,814 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:14,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:31:14,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:15,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1749#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:31:15,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:15,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:31:15,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-11-03 03:31:15,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641526300] [2022-11-03 03:31:15,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:15,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:31:15,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:15,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:31:15,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:31:15,266 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:15,651 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2022-11-03 03:31:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:31:15,652 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 03:31:15,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:15,653 INFO L225 Difference]: With dead ends: 71 [2022-11-03 03:31:15,653 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 03:31:15,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:31:15,654 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:15,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 47 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:31:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 03:31:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2022-11-03 03:31:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-03 03:31:15,668 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14 [2022-11-03 03:31:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:15,668 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-03 03:31:15,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-03 03:31:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 03:31:15,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:15,669 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:15,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:15,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:31:15,877 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1710382253, now seen corresponding path program 7 times [2022-11-03 03:31:15,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:15,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678462596] [2022-11-03 03:31:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:15,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:15,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:31:15,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427542122] [2022-11-03 03:31:15,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:31:15,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:15,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:15,916 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:15,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:31:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:16,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 03:31:16,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:16,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:31:16,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2022-11-03 03:31:16,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:31:16,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:31:17,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:31:17,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:31:17,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:31:17,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 60 [2022-11-03 03:31:17,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:17,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:17,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 118 [2022-11-03 03:31:17,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 60 [2022-11-03 03:31:17,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:17,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:17,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 118 [2022-11-03 03:31:17,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 60 [2022-11-03 03:31:17,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:17,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:17,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 118 [2022-11-03 03:31:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:17,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:31:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:17,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:18,338 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_508 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_508) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ c_~N~0 1))) is different from false [2022-11-03 03:31:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2022-11-03 03:31:18,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:18,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678462596] [2022-11-03 03:31:18,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:31:18,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427542122] [2022-11-03 03:31:18,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427542122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:18,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [813098082] [2022-11-03 03:31:18,363 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:31:18,363 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:18,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:18,363 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:18,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:18,516 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:31:18,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:31:18,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:31:18,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 107 [2022-11-03 03:31:18,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:18,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 168 [2022-11-03 03:31:18,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:18,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:18,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,812 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-11-03 03:31:18,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 593 treesize of output 534 [2022-11-03 03:31:18,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:31:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:18,937 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:18,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:31:18,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:18,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:19,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:19,040 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 03:31:19,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 193 [2022-11-03 03:31:19,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:19,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:19,086 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:19,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:31:19,103 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:19,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2045#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:31:19,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:19,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:31:19,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2022-11-03 03:31:19,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800436647] [2022-11-03 03:31:19,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:19,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 03:31:19,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:19,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 03:31:19,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=441, Unknown=1, NotChecked=44, Total=600 [2022-11-03 03:31:19,515 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:20,349 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2022-11-03 03:31:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 03:31:20,349 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 03:31:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:20,350 INFO L225 Difference]: With dead ends: 112 [2022-11-03 03:31:20,350 INFO L226 Difference]: Without dead ends: 110 [2022-11-03 03:31:20,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=216, Invalid=977, Unknown=1, NotChecked=66, Total=1260 [2022-11-03 03:31:20,352 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:20,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 111 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 197 Invalid, 0 Unknown, 101 Unchecked, 0.4s Time] [2022-11-03 03:31:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-03 03:31:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 43. [2022-11-03 03:31:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-11-03 03:31:20,367 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 15 [2022-11-03 03:31:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:20,367 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-11-03 03:31:20,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-11-03 03:31:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:31:20,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:20,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:20,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:20,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:31:20,576 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash 724259981, now seen corresponding path program 3 times [2022-11-03 03:31:20,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:20,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118096452] [2022-11-03 03:31:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:20,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:20,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:31:20,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176164478] [2022-11-03 03:31:20,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:31:20,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:20,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:20,608 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:20,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:31:21,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:31:21,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:31:21,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 03:31:21,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:21,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:31:21,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-11-03 03:31:21,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-03 03:31:21,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 03:31:21,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:31:21,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2022-11-03 03:31:21,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-11-03 03:31:21,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-03 03:31:21,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2022-11-03 03:31:21,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-11-03 03:31:21,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 03:31:21,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-03 03:31:21,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 49 [2022-11-03 03:31:21,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:21,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 46 [2022-11-03 03:31:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:21,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:35,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:35,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118096452] [2022-11-03 03:31:35,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:31:35,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176164478] [2022-11-03 03:31:35,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176164478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:35,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [463733078] [2022-11-03 03:31:35,506 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:31:35,506 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:35,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:35,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:35,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:35,648 INFO L356 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-03 03:31:35,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-03 03:31:35,771 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:31:35,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:31:35,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 107 [2022-11-03 03:31:35,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 31 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 03:31:35,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:35,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:35,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,101 INFO L356 Elim1Store]: treesize reduction 241, result has 12.4 percent of original size [2022-11-03 03:31:36,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 42 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 43 case distinctions, treesize of input 528 treesize of output 538 [2022-11-03 03:31:36,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:31:36,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,348 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:36,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 03:31:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:36,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:36,480 INFO L356 Elim1Store]: treesize reduction 249, result has 12.0 percent of original size [2022-11-03 03:31:36,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 148 treesize of output 184 [2022-11-03 03:31:36,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:36,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:36,540 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:36,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:31:36,667 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:37,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2417#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:31:37,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:37,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:31:37,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-11-03 03:31:37,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84365095] [2022-11-03 03:31:37,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:37,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 03:31:37,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:37,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 03:31:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=653, Unknown=1, NotChecked=0, Total=756 [2022-11-03 03:31:37,358 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:38,004 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-11-03 03:31:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 03:31:38,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 03:31:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:38,006 INFO L225 Difference]: With dead ends: 65 [2022-11-03 03:31:38,007 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 03:31:38,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=128, Invalid=801, Unknown=1, NotChecked=0, Total=930 [2022-11-03 03:31:38,008 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:38,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-11-03 03:31:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 03:31:38,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2022-11-03 03:31:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2022-11-03 03:31:38,029 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 16 [2022-11-03 03:31:38,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:38,029 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2022-11-03 03:31:38,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:38,030 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2022-11-03 03:31:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 03:31:38,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:38,031 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:38,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-03 03:31:38,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:38,237 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:38,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1181831571, now seen corresponding path program 4 times [2022-11-03 03:31:38,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:38,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011252343] [2022-11-03 03:31:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:38,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:31:38,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602240093] [2022-11-03 03:31:38,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:31:38,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:38,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:38,270 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:38,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:31:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:38,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 03:31:38,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:38,598 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-03 03:31:38,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 58 [2022-11-03 03:31:38,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 35 [2022-11-03 03:31:38,647 INFO L356 Elim1Store]: treesize reduction 34, result has 34.6 percent of original size [2022-11-03 03:31:38,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 70 [2022-11-03 03:31:38,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 03:31:38,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 03:31:38,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:31:38,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 55 [2022-11-03 03:31:38,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:38,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-03 03:31:38,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 03:31:38,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:31:38,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:38,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-03 03:31:38,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:38,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:38,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-11-03 03:31:39,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:39,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:39,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:39,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 59 [2022-11-03 03:31:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:39,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:39,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:39,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:39,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:39,191 INFO L356 Elim1Store]: treesize reduction 36, result has 16.3 percent of original size [2022-11-03 03:31:39,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 74 treesize of output 69 [2022-11-03 03:31:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:39,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:02,309 WARN L234 SmtUtils]: Spent 13.52s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:32:31,883 WARN L234 SmtUtils]: Spent 14.44s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:32:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:31,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011252343] [2022-11-03 03:32:31,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:32:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602240093] [2022-11-03 03:32:31,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602240093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834791540] [2022-11-03 03:32:31,904 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:32:31,904 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:31,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:31,905 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:31,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:32,054 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:32:32,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:32:32,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:32:32,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 107 [2022-11-03 03:32:32,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 168 [2022-11-03 03:32:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,384 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-11-03 03:32:32,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 564 treesize of output 532 [2022-11-03 03:32:32,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:32:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,511 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:32,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 03:32:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,655 INFO L356 Elim1Store]: treesize reduction 254, result has 10.2 percent of original size [2022-11-03 03:32:32,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 148 treesize of output 179 [2022-11-03 03:32:32,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,729 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:32,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:32:32,854 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:34,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2738#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:32:34,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:34,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:32:34,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-11-03 03:32:34,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937802838] [2022-11-03 03:32:34,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:34,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 03:32:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 03:32:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=604, Unknown=7, NotChecked=0, Total=702 [2022-11-03 03:32:34,526 INFO L87 Difference]: Start difference. First operand 52 states and 68 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:07,574 WARN L234 SmtUtils]: Spent 32.59s on a formula simplification. DAG size of input: 100 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:33:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:15,119 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-11-03 03:33:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 03:33:15,119 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 03:33:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:15,120 INFO L225 Difference]: With dead ends: 70 [2022-11-03 03:33:15,120 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 03:33:15,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 92.1s TimeCoverageRelationStatistics Valid=218, Invalid=1181, Unknown=7, NotChecked=0, Total=1406 [2022-11-03 03:33:15,122 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:15,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 38 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 130 Invalid, 0 Unknown, 61 Unchecked, 1.4s Time] [2022-11-03 03:33:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 03:33:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-03 03:33:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2022-11-03 03:33:15,138 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 17 [2022-11-03 03:33:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:15,138 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2022-11-03 03:33:15,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2022-11-03 03:33:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 03:33:15,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:15,140 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:15,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:15,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:33:15,345 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:15,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1499444630, now seen corresponding path program 5 times [2022-11-03 03:33:15,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:15,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225879081] [2022-11-03 03:33:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:15,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:15,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:33:15,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708091101] [2022-11-03 03:33:15,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:33:15,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:15,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:15,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:15,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:33:16,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:33:16,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:16,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-03 03:33:16,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:16,712 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-03 03:33:16,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 58 [2022-11-03 03:33:16,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 35 [2022-11-03 03:33:16,754 INFO L356 Elim1Store]: treesize reduction 34, result has 34.6 percent of original size [2022-11-03 03:33:16,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 70 [2022-11-03 03:33:16,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 03:33:16,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 68 [2022-11-03 03:33:16,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:16,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-03 03:33:16,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:16,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-03 03:33:16,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 03:33:16,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2022-11-03 03:33:16,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 03:33:16,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:33:17,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,026 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:17,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 03:33:17,102 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 03:33:17,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 70 [2022-11-03 03:33:17,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-11-03 03:33:17,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 26 [2022-11-03 03:33:17,243 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 03:33:17,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 70 [2022-11-03 03:33:17,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-11-03 03:33:17,354 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 03:33:17,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 70 [2022-11-03 03:33:17,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-11-03 03:33:17,579 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 03:33:17,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 139 [2022-11-03 03:33:17,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:17,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 214 [2022-11-03 03:33:17,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 104 [2022-11-03 03:33:17,758 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 03:33:17,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 112 [2022-11-03 03:33:17,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 176 [2022-11-03 03:33:17,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,937 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:17,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 48 [2022-11-03 03:33:18,069 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:33:18,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 93 [2022-11-03 03:33:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:18,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:18,097 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-11-03 03:33:18,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 135 [2022-11-03 03:33:18,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 14 [2022-11-03 03:33:20,784 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:33:20,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 296 [2022-11-03 03:33:20,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 316 treesize of output 288 [2022-11-03 03:33:20,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 93 [2022-11-03 03:33:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:20,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:31,585 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:18,046 WARN L234 SmtUtils]: Spent 40.62s on a formula simplification. DAG size of input: 68 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:34:46,205 WARN L234 SmtUtils]: Spent 24.02s on a formula simplification. DAG size of input: 75 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:35:41,193 WARN L234 SmtUtils]: Spent 49.05s on a formula simplification. DAG size of input: 135 DAG size of output: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:36:06,958 WARN L234 SmtUtils]: Spent 9.23s on a formula simplification. DAG size of input: 153 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:36:58,492 WARN L234 SmtUtils]: Spent 38.77s on a formula simplification. DAG size of input: 200 DAG size of output: 182 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:36:58,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:58,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:58,552 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-03 03:36:58,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 367 treesize of output 1 [2022-11-03 03:36:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:36:58,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:36:58,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225879081] [2022-11-03 03:36:58,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:36:58,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708091101] [2022-11-03 03:36:58,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708091101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:58,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [906300786] [2022-11-03 03:36:58,558 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:36:58,558 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:36:58,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:36:58,559 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:36:58,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:36:58,748 INFO L356 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-03 03:36:58,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-03 03:36:58,894 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:36:58,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:36:58,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:58,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 107 [2022-11-03 03:36:58,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:58,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 31 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 03:36:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:59,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:59,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,264 INFO L356 Elim1Store]: treesize reduction 246, result has 10.5 percent of original size [2022-11-03 03:36:59,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 42 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 43 case distinctions, treesize of input 520 treesize of output 531 [2022-11-03 03:36:59,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:36:59,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,392 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:36:59,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 03:36:59,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:59,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:59,551 INFO L356 Elim1Store]: treesize reduction 254, result has 10.2 percent of original size [2022-11-03 03:36:59,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 148 treesize of output 179 [2022-11-03 03:36:59,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:59,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:59,606 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:36:59,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:36:59,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:37:03,565 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3089#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:37:03,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:37:03,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:37:03,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-03 03:37:03,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731877790] [2022-11-03 03:37:03,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:37:03,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 03:37:03,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:37:03,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 03:37:03,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=945, Unknown=11, NotChecked=0, Total=1122 [2022-11-03 03:37:03,567 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:37:09,530 WARN L234 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 73 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:37:14,892 WARN L234 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 72 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:37:36,030 WARN L234 SmtUtils]: Spent 17.92s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:38:18,133 WARN L234 SmtUtils]: Spent 18.13s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:38:29,439 WARN L234 SmtUtils]: Spent 6.59s on a formula simplification that was a NOOP. DAG size: 159 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:39:18,426 WARN L234 SmtUtils]: Spent 18.13s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:39:33,564 WARN L234 SmtUtils]: Spent 7.82s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:39:38,695 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse1 (+ c_~N~0 1))) (and (exists ((|ULTIMATE.start_main_~b~0#1.base| Int) (v_DerPreprocessor_30 Int)) (let ((.cse3 (let ((.cse7 (* 8 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)))) (let ((.cse6 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse7))) (store (store .cse5 .cse6 v_DerPreprocessor_30) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse7) (select .cse5 .cse6)))))) (let ((.cse0 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (select (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) 0))) (and (= .cse0 .cse1) (= .cse2 1) (= (select .cse3 .cse4) (+ 2 .cse0 .cse2)) (not (= |ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)))))) (< 4 c_~N~0) (or (let ((.cse8 (+ (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse9 (+ c_~N~0 4))) (and (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_713 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_710 Int)) (let ((.cse10 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (store .cse5 .cse8 v_ArrVal_710) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_713) .cse4) .cse9) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse10)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse10 1) c_~N~0)))) (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_713 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_710 Int)) (let ((.cse11 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (store .cse5 .cse8 v_ArrVal_710) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_713) .cse4) .cse9) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse11)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse11 1) c_~N~0)))))) (not (< 1 c_~N~0))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (< |c_ULTIMATE.start_main_~i~0#1| .cse1) (<= c_~N~0 5))) is different from false [2022-11-03 03:39:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:38,850 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2022-11-03 03:39:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 03:39:38,851 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 03:39:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:38,852 INFO L225 Difference]: With dead ends: 92 [2022-11-03 03:39:38,853 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 03:39:38,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 373.7s TimeCoverageRelationStatistics Valid=279, Invalid=1486, Unknown=45, NotChecked=82, Total=1892 [2022-11-03 03:39:38,854 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:38,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 39 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-11-03 03:39:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 03:39:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2022-11-03 03:39:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2022-11-03 03:39:38,888 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 18 [2022-11-03 03:39:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:38,888 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2022-11-03 03:39:38,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2022-11-03 03:39:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 03:39:38,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:38,889 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:38,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:39,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 03:39:39,097 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:39,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1481457124, now seen corresponding path program 6 times [2022-11-03 03:39:39,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:39,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138172488] [2022-11-03 03:39:39,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:39,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:39,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:39:39,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253813399] [2022-11-03 03:39:39,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:39:39,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:39,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:39,118 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:39,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 03:39:39,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:39:39,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:39:39,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 03:39:39,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:39,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:39:39,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-11-03 03:39:39,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-03 03:39:39,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:39:39,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 03:39:39,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-03 03:39:39,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 46 [2022-11-03 03:39:39,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-11-03 03:39:39,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 149 [2022-11-03 03:39:39,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:39:39,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 217 [2022-11-03 03:39:39,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:39,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 117 [2022-11-03 03:39:40,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:39:40,082 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 03:39:40,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 60 [2022-11-03 03:39:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:39:40,169 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 03:39:40,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 72 [2022-11-03 03:39:40,679 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-03 03:39:40,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 43 [2022-11-03 03:39:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:40,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:40,162 WARN L234 SmtUtils]: Spent 27.17s on a formula simplification. DAG size of input: 171 DAG size of output: 155 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:40:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:40,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:40,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138172488] [2022-11-03 03:40:40,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:40:40,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253813399] [2022-11-03 03:40:40,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253813399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:40,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511932742] [2022-11-03 03:40:40,200 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:40:40,200 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:40:40,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:40:40,201 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:40:40,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:40:40,370 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:40:40,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:40:40,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 107 [2022-11-03 03:40:40,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:40:40,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:40,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 168 [2022-11-03 03:40:40,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:40,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:40,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,840 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-11-03 03:40:40,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 593 treesize of output 534 [2022-11-03 03:40:40,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:40:40,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:41,000 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:40:41,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 03:40:41,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:41,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:41,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:41,054 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:40:41,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:40:41,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:41,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:41,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:41,114 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:40:41,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:40:41,204 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:40:45,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3502#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:40:45,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:40:45,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:40:45,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-11-03 03:40:45,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009238773] [2022-11-03 03:40:45,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:40:45,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:40:45,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:45,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:40:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=810, Unknown=5, NotChecked=0, Total=930 [2022-11-03 03:40:45,192 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:48,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:48,128 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2022-11-03 03:40:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:40:48,129 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 03:40:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:48,130 INFO L225 Difference]: With dead ends: 89 [2022-11-03 03:40:48,130 INFO L226 Difference]: Without dead ends: 79 [2022-11-03 03:40:48,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 64.9s TimeCoverageRelationStatistics Valid=169, Invalid=1086, Unknown=5, NotChecked=0, Total=1260 [2022-11-03 03:40:48,131 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:48,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2022-11-03 03:40:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-03 03:40:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2022-11-03 03:40:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 66 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 90 transitions. [2022-11-03 03:40:48,175 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 90 transitions. Word has length 19 [2022-11-03 03:40:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:48,176 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 90 transitions. [2022-11-03 03:40:48,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 90 transitions. [2022-11-03 03:40:48,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 03:40:48,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:48,181 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:48,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:48,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:40:48,383 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:48,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:48,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1715181741, now seen corresponding path program 8 times [2022-11-03 03:40:48,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:48,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934306454] [2022-11-03 03:40:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:48,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:48,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:40:48,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819679161] [2022-11-03 03:40:48,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:40:48,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:48,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:48,423 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:48,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 03:40:50,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 03:40:50,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:40:50,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:40:50,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:40:51,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:40:51,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:51,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934306454] [2022-11-03 03:40:51,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:40:51,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819679161] [2022-11-03 03:40:51,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819679161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:51,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577973207] [2022-11-03 03:40:51,326 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:40:51,326 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:40:51,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:40:51,327 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:40:51,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:40:51,529 INFO L356 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-03 03:40:51,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-03 03:40:51,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:51,658 INFO L356 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2022-11-03 03:40:51,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 125 [2022-11-03 03:40:51,857 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:40:51,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:40:51,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:51,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 168 [2022-11-03 03:40:52,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:52,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:52,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,223 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-11-03 03:40:52,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 564 treesize of output 532 [2022-11-03 03:40:52,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:40:52,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:52,387 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:40:52,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:40:52,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:52,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:52,486 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 03:40:52,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 193 [2022-11-03 03:40:52,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:52,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:52,546 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:40:52,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:40:52,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:40:53,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3903#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:40:53,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:40:53,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:40:53,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2022-11-03 03:40:53,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677122999] [2022-11-03 03:40:53,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:40:53,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 03:40:53,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 03:40:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:40:53,136 INFO L87 Difference]: Start difference. First operand 67 states and 90 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:54,170 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2022-11-03 03:40:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:40:54,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 03:40:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:54,173 INFO L225 Difference]: With dead ends: 139 [2022-11-03 03:40:54,173 INFO L226 Difference]: Without dead ends: 123 [2022-11-03 03:40:54,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 03:40:54,175 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 113 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:54,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 64 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:40:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-03 03:40:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2022-11-03 03:40:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 72 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2022-11-03 03:40:54,231 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 19 [2022-11-03 03:40:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:54,232 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2022-11-03 03:40:54,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2022-11-03 03:40:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:40:54,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:54,233 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:54,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:54,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 03:40:54,443 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:54,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:54,443 INFO L85 PathProgramCache]: Analyzing trace with hash -394448710, now seen corresponding path program 9 times [2022-11-03 03:40:54,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:54,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103347437] [2022-11-03 03:40:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:54,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:54,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:40:54,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048860213] [2022-11-03 03:40:54,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:40:54,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:54,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:54,485 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:54,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 03:40:54,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:40:54,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:40:54,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:40:54,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:40:54,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:40:55,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:55,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103347437] [2022-11-03 03:40:55,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:40:55,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048860213] [2022-11-03 03:40:55,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048860213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:55,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709820091] [2022-11-03 03:40:55,013 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 03:40:55,013 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:40:55,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:40:55,014 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:40:55,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:40:55,194 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:40:55,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:40:55,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 107 [2022-11-03 03:40:55,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-03 03:40:55,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:55,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 168 [2022-11-03 03:40:55,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:55,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:55,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,744 INFO L356 Elim1Store]: treesize reduction 308, result has 0.3 percent of original size [2022-11-03 03:40:55,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 42 case distinctions, treesize of input 593 treesize of output 534 [2022-11-03 03:40:55,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:40:55,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:55,905 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:40:55,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:40:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:55,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:40:55,962 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:40:55,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:40:55,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:40:56,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4405#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:40:56,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:40:56,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:40:56,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2022-11-03 03:40:56,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495430881] [2022-11-03 03:40:56,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:40:56,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 03:40:56,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:56,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 03:40:56,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:40:56,924 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:58,488 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2022-11-03 03:40:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 03:40:58,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 03:40:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:58,491 INFO L225 Difference]: With dead ends: 164 [2022-11-03 03:40:58,491 INFO L226 Difference]: Without dead ends: 152 [2022-11-03 03:40:58,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=533, Invalid=2223, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 03:40:58,492 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 155 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:58,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 98 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:40:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-03 03:40:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 80. [2022-11-03 03:40:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 103 transitions. [2022-11-03 03:40:58,552 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 103 transitions. Word has length 20 [2022-11-03 03:40:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:58,552 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 103 transitions. [2022-11-03 03:40:58,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 103 transitions. [2022-11-03 03:40:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:40:58,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:58,553 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:58,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:40:58,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:58,757 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:58,758 INFO L85 PathProgramCache]: Analyzing trace with hash 51791853, now seen corresponding path program 7 times [2022-11-03 03:40:58,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:58,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672208528] [2022-11-03 03:40:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:58,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:58,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:40:58,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329758446] [2022-11-03 03:40:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:40:58,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:58,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:58,783 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:58,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 03:41:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:01,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 03:41:01,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:01,084 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-03 03:41:01,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 58 [2022-11-03 03:41:01,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 35 [2022-11-03 03:41:01,150 INFO L356 Elim1Store]: treesize reduction 34, result has 34.6 percent of original size [2022-11-03 03:41:01,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 70 [2022-11-03 03:41:01,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-03 03:41:01,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 03:41:01,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 03:41:01,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 55 [2022-11-03 03:41:01,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:01,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2022-11-03 03:41:01,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:01,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-03 03:41:01,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:41:01,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:01,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 03:41:01,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2022-11-03 03:41:01,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:01,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:01,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-11-03 03:41:01,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:01,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 26 [2022-11-03 03:41:01,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2022-11-03 03:41:01,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:01,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:01,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-11-03 03:41:01,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:01,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:01,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 26 [2022-11-03 03:41:01,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2022-11-03 03:41:01,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:01,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-11-03 03:41:02,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-03 03:41:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-03 03:41:02,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-03 03:41:02,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 46 [2022-11-03 03:41:02,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 79 [2022-11-03 03:41:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 137 [2022-11-03 03:41:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 30 [2022-11-03 03:41:02,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 03:41:02,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:02,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 03:41:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:03,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:27,723 WARN L234 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 97 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:42:06,163 WARN L234 SmtUtils]: Spent 17.46s on a formula simplification. DAG size of input: 122 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:43:17,259 WARN L234 SmtUtils]: Spent 36.82s on a formula simplification. DAG size of input: 148 DAG size of output: 134 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:43:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 27 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:17,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672208528] [2022-11-03 03:43:17,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:43:17,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329758446] [2022-11-03 03:43:17,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329758446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:17,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864257340] [2022-11-03 03:43:17,277 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:43:17,278 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:43:17,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:43:17,278 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:43:17,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:43:17,488 INFO L356 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-03 03:43:17,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-03 03:43:17,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:17,626 INFO L356 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2022-11-03 03:43:17,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 125 [2022-11-03 03:43:17,843 INFO L356 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-03 03:43:17,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-03 03:43:17,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:17,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 31 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 124 [2022-11-03 03:43:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:18,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:18,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,294 INFO L356 Elim1Store]: treesize reduction 241, result has 12.4 percent of original size [2022-11-03 03:43:18,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 42 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 43 case distinctions, treesize of input 526 treesize of output 538 [2022-11-03 03:43:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-03 03:43:18,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,551 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:43:18,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 03:43:18,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:18,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:18,788 INFO L356 Elim1Store]: treesize reduction 254, result has 10.2 percent of original size [2022-11-03 03:43:18,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 148 treesize of output 179 [2022-11-03 03:43:18,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:18,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:18,864 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:43:18,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-03 03:43:18,970 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:43:24,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4981#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 03:43:24,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:43:24,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:43:24,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-11-03 03:43:24,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683935732] [2022-11-03 03:43:24,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:43:24,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:43:24,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:24,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:43:24,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1081, Unknown=17, NotChecked=0, Total=1260 [2022-11-03 03:43:24,673 INFO L87 Difference]: Start difference. First operand 80 states and 103 transitions. Second operand has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:26,801 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse33 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse35 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse34 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse36 (mod (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse27 (* .cse36 8)) (.cse31 (* .cse34 8)) (.cse17 (<= .cse35 2147483647)) (.cse25 (<= .cse36 2147483647)) (.cse30 (* 8 .cse35)) (.cse7 (<= .cse34 2147483647)) (.cse14 (<= .cse33 2147483647)) (.cse32 (* .cse33 8))) (let ((.cse11 (+ .cse32 (- 34359738368) |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse0 (not .cse14)) (.cse1 (not .cse7)) (.cse20 (+ .cse30 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse23 (not .cse25)) (.cse13 (not .cse17)) (.cse6 (+ .cse31 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse2 (+ c_~N~0 2)) (.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse5 (+ .cse32 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse9 (+ .cse31 (- 34359738368) |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse12 (+ .cse30 (- 34359738368) |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse22 (+ (- 34359738368) .cse27 |c_ULTIMATE.start_main_~b~0#1.offset|))) (and (= (+ c_~N~0 1) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (or .cse0 (and (or .cse1 (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int)) (= .cse2 (let ((.cse3 (store (store .cse4 .cse5 v_ArrVal_999) .cse6 v_ArrVal_1001))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) (or .cse7 (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int)) (= .cse2 (let ((.cse8 (store (store .cse4 .cse5 v_ArrVal_999) .cse9 v_ArrVal_1001))) (+ (select .cse8 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))))))) (or (and (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int) (v_ArrVal_997 Int)) (= .cse2 (let ((.cse10 (store (store (store .cse4 .cse11 v_ArrVal_997) .cse9 v_ArrVal_999) .cse12 v_ArrVal_1001))) (+ (select .cse10 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse10) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) .cse13) .cse14) (or (and (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int)) (= .cse2 (let ((.cse15 (store (store .cse4 .cse11 v_ArrVal_999) .cse9 v_ArrVal_1001))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse15) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse15 |c_ULTIMATE.start_main_~b~0#1.offset|))))) .cse1) .cse14) (or .cse0 (and (or .cse7 (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int) (v_ArrVal_997 Int)) (= .cse2 (let ((.cse16 (store (store (store .cse4 .cse5 v_ArrVal_997) .cse9 v_ArrVal_999) .cse12 v_ArrVal_1001))) (+ (select .cse16 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse16) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (or .cse1 (and (or .cse17 (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int) (v_ArrVal_997 Int)) (= (let ((.cse18 (store (store (store .cse4 .cse5 v_ArrVal_997) .cse6 v_ArrVal_999) .cse12 v_ArrVal_1001))) (+ (select .cse18 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse18) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) .cse2))) (or .cse13 (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int) (v_ArrVal_997 Int)) (= .cse2 (let ((.cse19 (store (store (store .cse4 .cse5 v_ArrVal_997) .cse6 v_ArrVal_999) .cse20 v_ArrVal_1001))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse19) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse19 |c_ULTIMATE.start_main_~b~0#1.offset|)))))))))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (or (and (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int) (v_ArrVal_997 Int) (v_ArrVal_996 Int)) (= .cse2 (let ((.cse21 (store (store (store (store .cse4 .cse11 v_ArrVal_996) .cse9 v_ArrVal_997) .cse12 v_ArrVal_999) .cse22 v_ArrVal_1001))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse21) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse21 |c_ULTIMATE.start_main_~b~0#1.offset|))))) .cse23) .cse14) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (or .cse0 (and (or .cse1 (and (or (and (or (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int) (v_ArrVal_997 Int) (v_ArrVal_996 Int)) (= .cse2 (let ((.cse24 (store (store (store (store .cse4 .cse5 v_ArrVal_996) .cse6 v_ArrVal_997) .cse20 v_ArrVal_999) .cse22 v_ArrVal_1001))) (+ (select .cse24 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse24) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) .cse25) (or (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int) (v_ArrVal_997 Int) (v_ArrVal_996 Int)) (= (let ((.cse26 (store (store (store (store .cse4 .cse5 v_ArrVal_996) .cse6 v_ArrVal_997) .cse20 v_ArrVal_999) (+ .cse27 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_1001))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse26) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse26 |c_ULTIMATE.start_main_~b~0#1.offset|))) .cse2)) .cse23)) .cse13) (or (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int) (v_ArrVal_997 Int) (v_ArrVal_996 Int)) (= .cse2 (let ((.cse28 (store (store (store (store .cse4 .cse5 v_ArrVal_996) .cse6 v_ArrVal_997) .cse12 v_ArrVal_999) .cse22 v_ArrVal_1001))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse28) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse28 |c_ULTIMATE.start_main_~b~0#1.offset|))))) .cse17))) (or .cse7 (forall ((v_ArrVal_1001 Int) (v_ArrVal_999 Int) (v_ArrVal_997 Int) (v_ArrVal_996 Int)) (= .cse2 (let ((.cse29 (store (store (store (store .cse4 .cse5 v_ArrVal_996) .cse9 v_ArrVal_997) .cse12 v_ArrVal_999) .cse22 v_ArrVal_1001))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse29) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse29 |c_ULTIMATE.start_main_~b~0#1.offset|)))))))))))) is different from true [2022-11-03 03:43:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:32,947 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2022-11-03 03:43:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 03:43:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 03:43:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:32,949 INFO L225 Difference]: With dead ends: 126 [2022-11-03 03:43:32,949 INFO L226 Difference]: Without dead ends: 124 [2022-11-03 03:43:32,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 145.1s TimeCoverageRelationStatistics Valid=185, Invalid=1206, Unknown=19, NotChecked=72, Total=1482 [2022-11-03 03:43:32,950 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:32,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-03 03:43:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-03 03:43:32,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2022-11-03 03:43:32,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 84 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:32,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2022-11-03 03:43:32,991 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 20 [2022-11-03 03:43:32,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:32,992 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2022-11-03 03:43:32,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:43:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2022-11-03 03:43:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 03:43:32,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:32,993 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:33,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:33,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:33,193 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:33,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1994729357, now seen corresponding path program 8 times [2022-11-03 03:43:33,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:33,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824292462] [2022-11-03 03:43:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:33,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:33,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:43:33,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908764391] [2022-11-03 03:43:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:43:33,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:33,214 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:33,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7debd991-814e-491d-b7f4-696a3b69dd1d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 03:43:34,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:43:34,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:43:34,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-03 03:43:34,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:34,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:43:34,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-03 03:43:34,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-03 03:43:34,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 03:43:34,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 03:43:34,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,472 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:43:34,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2022-11-03 03:43:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,554 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:43:34,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2022-11-03 03:43:34,702 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 03:43:34,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 77 [2022-11-03 03:43:34,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 133 [2022-11-03 03:43:34,898 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 03:43:34,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 110 [2022-11-03 03:43:34,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 133 [2022-11-03 03:43:34,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:34,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 26 [2022-11-03 03:43:35,228 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 03:43:35,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 149 [2022-11-03 03:43:35,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:35,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 217 [2022-11-03 03:43:35,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 54 [2022-11-03 03:43:35,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:35,531 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 03:43:35,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 60 [2022-11-03 03:43:35,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:43:35,683 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 03:43:35,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 73 [2022-11-03 03:43:35,877 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-03 03:43:35,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 110 [2022-11-03 03:43:35,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,915 INFO L356 Elim1Store]: treesize reduction 101, result has 1.0 percent of original size [2022-11-03 03:43:35,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 147 [2022-11-03 03:43:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:43:36,090 INFO L356 Elim1Store]: treesize reduction 94, result has 37.3 percent of original size [2022-11-03 03:43:36,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 86 [2022-11-03 03:43:38,157 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-03 03:43:38,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 47 [2022-11-03 03:43:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:38,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:19,528 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse38 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse36 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse15 (<= .cse38 2147483647)) (.cse37 (* .cse38 8))) (let ((.cse21 (+ .cse37 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse0 (not .cse15)) (.cse6 (+ c_~N~0 9)) (.cse7 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse1 (+ c_~N~0 4)) (.cse4 (+ c_~N~0 1)) (.cse9 (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse13 (+ .cse37 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse23 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse12 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse22 (* 8 .cse36)) (.cse24 (<= .cse36 2147483647))) (and (or (let ((.cse14 (+ (select .cse12 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse22)) (select .cse23 (+ (- 34359738368) .cse22 |c_ULTIMATE.start_main_~b~0#1.offset|)) 2))) (and (or .cse0 (let ((.cse8 (store .cse12 .cse13 .cse14))) (and (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse5 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296)) (.cse2 (store (store .cse8 .cse9 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1087))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= .cse1 (select .cse2 .cse3))) (not (= (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse5)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse5 1) c_~N~0) (= .cse6 (select .cse2 .cse7))))) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse10 (store (store .cse8 .cse9 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_1087)) (.cse11 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= .cse6 (select .cse10 .cse7)) (not (= (select .cse10 .cse3) .cse1)) (not (= (select .cse10 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse11)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse11 1) c_~N~0))))))) (or .cse15 (let ((.cse18 (store .cse12 .cse21 .cse14))) (and (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse16 (store (store .cse18 .cse9 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1087)) (.cse17 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= (select .cse16 .cse3) .cse1)) (= .cse6 (select .cse16 .cse7)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse17)) (not (= .cse4 (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse17 1) c_~N~0)))) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse19 (store (store .cse18 .cse9 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_1087)) (.cse20 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (not (= (select .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select .cse19 .cse7) .cse6) (not (= .cse1 (select .cse19 .cse3))) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse20)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse20 1) c_~N~0))))))))) .cse24) (or (let ((.cse30 (+ 2 (select .cse23 (+ .cse22 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse12 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse22))))) (and (or .cse15 (let ((.cse27 (store .cse12 .cse21 .cse30))) (and (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse25 (store (store .cse27 .cse9 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1087)) (.cse26 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (not (= .cse1 (select .cse25 .cse3))) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= .cse6 (select .cse25 .cse7)) (not (= (select .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse26)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse26 1) c_~N~0)))) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse28 (store (store .cse27 .cse9 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_1087)) (.cse29 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (not (= (select .cse28 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= (select .cse28 .cse3) .cse1)) (= .cse6 (select .cse28 .cse7)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse29)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse29 1) c_~N~0))))))) (or .cse0 (let ((.cse33 (store .cse12 .cse13 .cse30))) (and (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse31 (store (store .cse33 .cse9 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1087)) (.cse32 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (= .cse6 (select .cse31 .cse7)) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= (select .cse31 .cse3) .cse1)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse32)) (not (= (select .cse31 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse32 1) c_~N~0)))) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse34 (store (store .cse33 .cse9 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_1087)) (.cse35 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (= .cse6 (select .cse34 .cse7)) (not (= (select .cse34 .cse3) .cse1)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= .cse4 (select .cse34 |c_ULTIMATE.start_main_~a~0#1.offset|))) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse35)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse35 1) c_~N~0))))))))) (not .cse24)))))) is different from false [2022-11-03 03:44:41,319 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse61 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse62 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse17 (<= .cse62 2147483647)) (.cse59 (* .cse62 8)) (.cse29 (<= .cse61 2147483647)) (.cse60 (* .cse61 8)) (.cse58 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse38 (<= .cse58 2147483647)) (.cse9 (+ .cse60 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse28 (not .cse29)) (.cse10 (+ .cse59 (- 34359738368) |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse12 (+ .cse59 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse2 (+ c_~N~0 1)) (.cse6 (+ c_~N~0 9)) (.cse7 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ c_~N~0 4)) (.cse22 (+ .cse60 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse23 (+ .cse59 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse24 (+ .cse59 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse13 (+ (* 8 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse18 (not .cse17)) (.cse11 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse36 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse37 (* 8 .cse58))) (and (or (let ((.cse0 (+ 2 (select .cse36 (+ .cse37 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse37))))) (and (or (and (forall ((v_ArrVal_1082 Int)) (or (not (<= .cse0 v_ArrVal_1082)) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse1 (store (store (let ((.cse8 (store .cse11 .cse12 v_ArrVal_1082))) (store .cse8 .cse9 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~b~0#1.base|) .cse10) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_1087)) (.cse3 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (not (= (select .cse1 .cse4) .cse5)) (= .cse6 (select .cse1 .cse7)) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3 1) c_~N~0)))))) (forall ((v_ArrVal_1082 Int)) (or (not (<= .cse0 v_ArrVal_1082)) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse15 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296)) (.cse14 (store (store (let ((.cse16 (store .cse11 .cse12 v_ArrVal_1082))) (store .cse16 .cse9 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse16) |c_ULTIMATE.start_main_~b~0#1.base|) .cse10) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1087))) (or (not (= (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse15)) (= .cse6 (select .cse14 .cse7)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse15 1) c_~N~0) (not (= (select .cse14 .cse4) .cse5)))))))) .cse17) (or .cse18 (and (or (and (forall ((v_ArrVal_1082 Int)) (or (not (<= .cse0 v_ArrVal_1082)) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse19 (store (store (let ((.cse21 (store .cse11 .cse24 v_ArrVal_1082))) (store .cse21 .cse22 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse21) |c_ULTIMATE.start_main_~b~0#1.base|) .cse23) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_1087)) (.cse20 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (not (= (select .cse19 .cse4) .cse5)) (= .cse6 (select .cse19 .cse7)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= (select .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse20)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse20 1) c_~N~0)))))) (forall ((v_ArrVal_1082 Int)) (or (not (<= .cse0 v_ArrVal_1082)) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse25 (store (store (let ((.cse27 (store .cse11 .cse24 v_ArrVal_1082))) (store .cse27 .cse22 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse27) |c_ULTIMATE.start_main_~b~0#1.base|) .cse23) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1087)) (.cse26 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= (select .cse25 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (= .cse6 (select .cse25 .cse7)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse26)) (not (= (select .cse25 .cse4) .cse5)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse26 1) c_~N~0))))))) .cse28) (or .cse29 (and (forall ((v_ArrVal_1082 Int)) (or (not (<= .cse0 v_ArrVal_1082)) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse31 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296)) (.cse30 (store (store (let ((.cse32 (store .cse11 .cse24 v_ArrVal_1082))) (store .cse32 .cse9 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse32) |c_ULTIMATE.start_main_~b~0#1.base|) .cse23) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_1087))) (or (not (= (select .cse30 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= .cse5 (select .cse30 .cse4))) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse31)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse31 1) c_~N~0) (= .cse6 (select .cse30 .cse7))))))) (forall ((v_ArrVal_1082 Int)) (or (not (<= .cse0 v_ArrVal_1082)) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse34 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296)) (.cse33 (store (store (let ((.cse35 (store .cse11 .cse24 v_ArrVal_1082))) (store .cse35 .cse9 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse35) |c_ULTIMATE.start_main_~b~0#1.base|) .cse23) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1087))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= .cse6 (select .cse33 .cse7)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse34)) (not (= (select .cse33 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse34 1) c_~N~0) (not (= (select .cse33 .cse4) .cse5))))))))))))) (not .cse38)) (or .cse38 (let ((.cse39 (+ (select .cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse37)) (select .cse36 (+ (- 34359738368) .cse37 |c_ULTIMATE.start_main_~b~0#1.offset|)) 2))) (and (or (and (or .cse29 (and (forall ((v_ArrVal_1082 Int)) (or (not (<= .cse39 v_ArrVal_1082)) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse40 (store (store (let ((.cse42 (store .cse11 .cse12 v_ArrVal_1082))) (store .cse42 .cse9 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse42) |c_ULTIMATE.start_main_~b~0#1.base|) .cse10) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_1087)) (.cse41 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= (select .cse40 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse41)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (not (= (select .cse40 .cse4) .cse5)) (= .cse6 (select .cse40 .cse7)) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse41 1) c_~N~0)))))) (forall ((v_ArrVal_1082 Int)) (or (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse44 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296)) (.cse43 (store (store (let ((.cse45 (store .cse11 .cse12 v_ArrVal_1082))) (store .cse45 .cse9 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse45) |c_ULTIMATE.start_main_~b~0#1.base|) .cse10) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1087))) (or (not (= (select .cse43 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse44)) (= .cse6 (select .cse43 .cse7)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse44 1) c_~N~0) (not (= (select .cse43 .cse4) .cse5))))) (not (<= .cse39 v_ArrVal_1082)))))) (or .cse28 (and (forall ((v_ArrVal_1082 Int)) (or (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse46 (store (store (let ((.cse48 (store .cse11 .cse12 v_ArrVal_1082))) (store .cse48 .cse22 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse48) |c_ULTIMATE.start_main_~b~0#1.base|) .cse10) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_1087)) (.cse47 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (not (= (select .cse46 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= (select .cse46 .cse4) .cse5)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse47)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (= .cse6 (select .cse46 .cse7)) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse47 1) c_~N~0)))) (not (<= .cse39 v_ArrVal_1082)))) (forall ((v_ArrVal_1082 Int)) (or (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse50 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296)) (.cse49 (store (store (let ((.cse51 (store .cse11 .cse12 v_ArrVal_1082))) (store .cse51 .cse22 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse51) |c_ULTIMATE.start_main_~b~0#1.base|) .cse10) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1087))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= .cse2 (select .cse49 |c_ULTIMATE.start_main_~a~0#1.offset|))) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse50)) (not (= .cse5 (select .cse49 .cse4))) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse50 1) c_~N~0) (= .cse6 (select .cse49 .cse7))))) (not (<= .cse39 v_ArrVal_1082))))))) .cse17) (or (and (forall ((v_ArrVal_1082 Int)) (or (not (<= .cse39 v_ArrVal_1082)) (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse52 (store (store (let ((.cse54 (store .cse11 .cse24 v_ArrVal_1082))) (store .cse54 .cse22 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse54) |c_ULTIMATE.start_main_~b~0#1.base|) .cse23) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_1087)) (.cse53 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (not (= (select .cse52 .cse4) .cse5)) (= .cse6 (select .cse52 .cse7)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= (select .cse52 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse53)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse53 1) c_~N~0)))))) (forall ((v_ArrVal_1082 Int)) (or (forall ((v_ArrVal_1085 Int) (v_ArrVal_1087 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse55 (store (store (let ((.cse57 (store .cse11 .cse24 v_ArrVal_1082))) (store .cse57 .cse22 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse57) |c_ULTIMATE.start_main_~b~0#1.base|) .cse23) 2 v_ArrVal_1082))) .cse13 v_ArrVal_1085) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1087)) (.cse56 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (not (= (select .cse55 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (= .cse6 (select .cse55 .cse7)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse56)) (not (= (select .cse55 .cse4) .cse5)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse56 1) c_~N~0)))) (not (<= .cse39 v_ArrVal_1082))))) .cse18)))))))) is different from true