./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ss1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V --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 26cc6c43657aae3d6045b0e296032a25844d2e64f01344915dc1323c4b8b39f3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:11:34,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:11:34,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:11:34,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:11:34,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:11:34,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:11:34,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:11:35,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:11:35,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:11:35,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:11:35,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:11:35,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:11:35,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:11:35,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:11:35,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:11:35,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:11:35,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:11:35,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:11:35,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:11:35,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:11:35,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:11:35,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:11:35,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:11:35,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:11:35,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:11:35,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:11:35,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:11:35,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:11:35,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:11:35,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:11:35,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:11:35,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:11:35,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:11:35,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:11:35,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:11:35,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:11:35,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:11:35,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:11:35,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:11:35,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:11:35,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:11:35,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:11:35,120 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:11:35,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:11:35,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:11:35,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:11:35,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:11:35,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:11:35,124 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:11:35,124 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:11:35,124 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:11:35,124 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:11:35,126 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:11:35,126 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:11:35,126 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:11:35,127 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:11:35,127 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:11:35,127 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:11:35,127 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:11:35,128 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:11:35,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:11:35,129 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:11:35,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:11:35,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:11:35,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:11:35,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:11:35,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:11:35,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:11:35,132 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:11:35,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:11:35,132 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:11:35,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:11:35,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:11:35,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:11:35,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:11:35,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:11:35,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:11:35,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:11:35,134 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:11:35,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:11:35,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:11:35,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:11:35,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:11:35,135 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26cc6c43657aae3d6045b0e296032a25844d2e64f01344915dc1323c4b8b39f3 [2021-11-23 03:11:35,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:11:35,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:11:35,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:11:35,454 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:11:35,455 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:11:35,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-fpi/ss1.c [2021-11-23 03:11:35,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/data/e29c969f0/93e68a53732b407ea370abd8a5f87c90/FLAG6d0d21723 [2021-11-23 03:11:35,986 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:11:35,987 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/sv-benchmarks/c/array-fpi/ss1.c [2021-11-23 03:11:35,993 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/data/e29c969f0/93e68a53732b407ea370abd8a5f87c90/FLAG6d0d21723 [2021-11-23 03:11:36,400 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/data/e29c969f0/93e68a53732b407ea370abd8a5f87c90 [2021-11-23 03:11:36,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:11:36,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:11:36,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:11:36,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:11:36,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:11:36,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19dc490b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36, skipping insertion in model container [2021-11-23 03:11:36,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:11:36,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:11:36,615 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_c662d02c-52d9-4211-8e2f-e0aa5004eedf/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2021-11-23 03:11:36,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:11:36,651 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:11:36,662 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_c662d02c-52d9-4211-8e2f-e0aa5004eedf/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2021-11-23 03:11:36,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:11:36,684 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:11:36,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36 WrapperNode [2021-11-23 03:11:36,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:11:36,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:11:36,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:11:36,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:11:36,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,741 INFO L137 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2021-11-23 03:11:36,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:11:36,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:11:36,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:11:36,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:11:36,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:11:36,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:11:36,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:11:36,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:11:36,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36" (1/1) ... [2021-11-23 03:11:36,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:11:36,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:36,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:11:36,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:11:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:11:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:11:36,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:11:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:11:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:11:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:11:36,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:11:36,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:11:36,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:11:37,000 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:11:37,002 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:11:37,178 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:11:37,233 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:11:37,233 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 03:11:37,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:11:37 BoogieIcfgContainer [2021-11-23 03:11:37,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:11:37,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:11:37,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:11:37,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:11:37,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:11:36" (1/3) ... [2021-11-23 03:11:37,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb977cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:11:37, skipping insertion in model container [2021-11-23 03:11:37,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:11:36" (2/3) ... [2021-11-23 03:11:37,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bb977cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:11:37, skipping insertion in model container [2021-11-23 03:11:37,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:11:37" (3/3) ... [2021-11-23 03:11:37,258 INFO L111 eAbstractionObserver]: Analyzing ICFG ss1.c [2021-11-23 03:11:37,263 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:11:37,263 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:11:37,339 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:11:37,348 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:11:37,348 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:11:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) 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) [2021-11-23 03:11:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:11:37,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:37,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:37,370 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:37,376 INFO L85 PathProgramCache]: Analyzing trace with hash 581057961, now seen corresponding path program 1 times [2021-11-23 03:11:37,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973677125] [2021-11-23 03:11:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:37,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:37,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:37,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973677125] [2021-11-23 03:11:37,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973677125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:37,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:37,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:37,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828244089] [2021-11-23 03:11:37,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:37,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:37,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:37,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:37,622 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-23 03:11:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:37,684 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2021-11-23 03:11:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:37,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2021-11-23 03:11:37,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:37,707 INFO L225 Difference]: With dead ends: 22 [2021-11-23 03:11:37,707 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 03:11:37,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:37,719 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:37,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:11:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 03:11:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 03:11:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 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) [2021-11-23 03:11:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2021-11-23 03:11:37,772 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2021-11-23 03:11:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:37,772 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2021-11-23 03:11:37,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-23 03:11:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2021-11-23 03:11:37,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:11:37,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:37,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:37,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:11:37,778 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash 431603023, now seen corresponding path program 1 times [2021-11-23 03:11:37,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:37,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727737832] [2021-11-23 03:11:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:37,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:37,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:11:37,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676755538] [2021-11-23 03:11:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:37,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:37,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:37,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:11:37,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:11:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:37,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:11:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:11:38,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:11:38,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:38,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727737832] [2021-11-23 03:11:38,008 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:11:38,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676755538] [2021-11-23 03:11:38,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676755538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:38,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:38,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:11:38,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500230850] [2021-11-23 03:11:38,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:38,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:38,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:38,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:38,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:38,012 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-23 03:11:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:38,059 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2021-11-23 03:11:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:38,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 [2021-11-23 03:11:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:38,060 INFO L225 Difference]: With dead ends: 18 [2021-11-23 03:11:38,061 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 03:11:38,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:38,063 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:38,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:11:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 03:11:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-23 03:11:38,069 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) [2021-11-23 03:11:38,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-23 03:11:38,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-11-23 03:11:38,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:38,070 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-23 03:11:38,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-23 03:11:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-23 03:11:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:11:38,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:38,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:38,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:11:38,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:38,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:38,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash 792964949, now seen corresponding path program 1 times [2021-11-23 03:11:38,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:38,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718394910] [2021-11-23 03:11:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:38,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:38,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:11:38,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374252712] [2021-11-23 03:11:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:38,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:38,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:38,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:11:38,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:11:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:38,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:11:38,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:38,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:11:38,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:38,561 INFO L388 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 19 treesize of output 18 [2021-11-23 03:11:38,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:38,712 INFO L388 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 36 treesize of output 23 [2021-11-23 03:11:38,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:38,823 INFO L388 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 40 treesize of output 23 [2021-11-23 03:11:38,996 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-23 03:11:38,997 INFO L388 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 53 treesize of output 32 [2021-11-23 03:11:39,194 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 03:11:39,195 INFO L388 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 81 treesize of output 57 [2021-11-23 03:11:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:39,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:11:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:39,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:39,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718394910] [2021-11-23 03:11:39,874 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:11:39,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374252712] [2021-11-23 03:11:39,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374252712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:11:39,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570564200] [2021-11-23 03:11:39,894 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:11:39,895 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:11:39,899 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:11:39,905 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:11:39,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:11:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,000 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:11:40,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2021-11-23 03:11:40,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,127 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:11:40,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:11:40,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,159 INFO L388 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 27 treesize of output 37 [2021-11-23 03:11:40,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,238 INFO L388 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 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-23 03:11:40,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:40,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:40,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:40,529 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 03:11:40,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 411 treesize of output 407 [2021-11-23 03:11:40,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:11:40,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:40,872 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:11:40,877 INFO L388 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 26 treesize of output 34 [2021-11-23 03:11:40,976 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:11:40,980 INFO L388 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 26 treesize of output 54 [2021-11-23 03:11:41,049 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:11:41,050 INFO L388 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 21 treesize of output 29 [2021-11-23 03:11:41,152 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:11:41,153 INFO L388 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 31 treesize of output 54 [2021-11-23 03:11:41,260 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:11:41,260 INFO L388 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 31 treesize of output 54 [2021-11-23 03:11:41,328 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:11:41,329 INFO L388 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 21 treesize of output 29 [2021-11-23 03:11:41,418 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:11:41,418 INFO L388 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 26 treesize of output 54 [2021-11-23 03:11:41,500 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:11:41,501 INFO L388 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 26 treesize of output 54 [2021-11-23 03:11:41,535 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:11:41,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '227#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:11:41,968 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:11:41,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:11:41,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-23 03:11:41,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4904978] [2021-11-23 03:11:41,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:11:41,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 03:11:41,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:41,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 03:11:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:11:41,972 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2021-11-23 03:11:46,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:46,598 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-11-23 03:11:46,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:11:46,599 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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 [2021-11-23 03:11:46,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:46,600 INFO L225 Difference]: With dead ends: 27 [2021-11-23 03:11:46,600 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 03:11:46,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:11:46,602 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:46,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 170 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2021-11-23 03:11:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 03:11:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-23 03:11:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-11-23 03:11:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-11-23 03:11:46,609 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2021-11-23 03:11:46,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:46,610 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-11-23 03:11:46,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2021-11-23 03:11:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-11-23 03:11:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:11:46,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:46,619 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:46,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:11:46,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:46,841 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:46,842 INFO L85 PathProgramCache]: Analyzing trace with hash -911807493, now seen corresponding path program 2 times [2021-11-23 03:11:46,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:46,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371802634] [2021-11-23 03:11:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:46,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:46,890 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:11:46,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555848994] [2021-11-23 03:11:46,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:11:46,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:46,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:46,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:11:46,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:11:46,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:11:46,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:11:46,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:11:46,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:11:47,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:11:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:11:47,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:47,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371802634] [2021-11-23 03:11:47,108 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:11:47,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555848994] [2021-11-23 03:11:47,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555848994] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:11:47,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1943119335] [2021-11-23 03:11:47,113 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:11:47,113 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:11:47,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:11:47,114 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:11:47,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:11:47,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:47,169 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:11:47,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2021-11-23 03:11:47,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:47,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:47,249 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-23 03:11:47,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-23 03:11:47,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:47,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:47,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:47,355 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:11:47,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:11:47,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:11:47,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:47,431 INFO L388 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 40 treesize of output 39 [2021-11-23 03:11:47,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:11:47,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:47,512 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:11:47,513 INFO L388 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 21 treesize of output 29 [2021-11-23 03:11:47,591 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:11:47,592 INFO L388 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 26 treesize of output 54 [2021-11-23 03:11:47,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:47,654 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:11:47,655 INFO L388 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 21 treesize of output 29 [2021-11-23 03:11:47,734 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:11:47,735 INFO L388 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 31 treesize of output 54 [2021-11-23 03:11:47,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:47,813 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:11:47,814 INFO L388 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 21 treesize of output 29 [2021-11-23 03:11:47,880 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:11:47,881 INFO L388 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 26 treesize of output 54 [2021-11-23 03:11:47,959 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:11:47,960 INFO L388 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 26 treesize of output 54 [2021-11-23 03:11:47,998 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:11:48,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-23 03:11:48,318 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:11:48,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:11:48,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 03:11:48,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065201300] [2021-11-23 03:11:48,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:11:48,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:11:48,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:11:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:11:48,320 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2021-11-23 03:11:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:48,455 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2021-11-23 03:11:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:11:48,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) Word has length 13 [2021-11-23 03:11:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:48,457 INFO L225 Difference]: With dead ends: 31 [2021-11-23 03:11:48,457 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 03:11:48,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:11:48,459 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:48,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:11:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 03:11:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-11-23 03:11:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 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) [2021-11-23 03:11:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-11-23 03:11:48,467 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2021-11-23 03:11:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:48,467 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-11-23 03:11:48,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2021-11-23 03:11:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-11-23 03:11:48,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:11:48,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:48,469 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:48,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:11:48,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:48,697 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:48,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:48,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1188195942, now seen corresponding path program 3 times [2021-11-23 03:11:48,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:48,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457777502] [2021-11-23 03:11:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:48,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:48,714 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:11:48,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942488473] [2021-11-23 03:11:48,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:11:48,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:48,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:48,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:11:48,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:11:48,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:11:48,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:11:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:11:48,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:11:48,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:11:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:11:48,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:48,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457777502] [2021-11-23 03:11:48,870 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:11:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942488473] [2021-11-23 03:11:48,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942488473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:11:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237741387] [2021-11-23 03:11:48,872 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:11:48,872 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:11:48,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:11:48,873 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:11:48,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:11:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:48,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:48,967 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-23 03:11:48,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-23 03:11:48,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:48,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:48,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,067 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:11:49,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:11:49,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-23 03:11:49,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,166 INFO L388 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 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-23 03:11:49,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:49,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:49,361 INFO L354 Elim1Store]: treesize reduction 169, result has 11.5 percent of original size [2021-11-23 03:11:49,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 416 treesize of output 406 [2021-11-23 03:11:49,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:11:49,482 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:11:49,482 INFO L388 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 21 treesize of output 29 [2021-11-23 03:11:49,570 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:11:49,570 INFO L388 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 26 treesize of output 54 [2021-11-23 03:11:49,651 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:11:49,651 INFO L388 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 26 treesize of output 54 [2021-11-23 03:11:49,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:49,707 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:11:49,707 INFO L388 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 31 treesize of output 34 [2021-11-23 03:11:49,767 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:11:49,768 INFO L388 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 31 treesize of output 54 [2021-11-23 03:11:49,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:49,823 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:11:49,824 INFO L388 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 26 treesize of output 34 [2021-11-23 03:11:49,884 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:11:49,884 INFO L388 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 26 treesize of output 54 [2021-11-23 03:11:49,913 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:11:50,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '578#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:11:50,170 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:11:50,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:11:50,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 03:11:50,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664177722] [2021-11-23 03:11:50,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:11:50,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:11:50,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:50,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:11:50,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:11:50,172 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2021-11-23 03:11:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:50,258 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-11-23 03:11:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:11:50,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) Word has length 13 [2021-11-23 03:11:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:50,259 INFO L225 Difference]: With dead ends: 33 [2021-11-23 03:11:50,259 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 03:11:50,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:11:50,260 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:50,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:11:50,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 03:11:50,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 03:11:50,265 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) [2021-11-23 03:11:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-23 03:11:50,265 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2021-11-23 03:11:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:50,265 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-23 03:11:50,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2021-11-23 03:11:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-23 03:11:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:11:50,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:50,266 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:50,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:11:50,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:50,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:50,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1993429225, now seen corresponding path program 4 times [2021-11-23 03:11:50,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:50,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370342444] [2021-11-23 03:11:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:50,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:50,501 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:11:50,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342470492] [2021-11-23 03:11:50,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:11:50,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:50,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:50,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:11:50,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:11:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:50,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 03:11:50,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:50,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:11:50,609 INFO L388 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 [2021-11-23 03:11:50,634 INFO L388 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 24 treesize of output 23 [2021-11-23 03:11:50,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:50,671 INFO L388 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 28 treesize of output 30 [2021-11-23 03:11:50,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:50,776 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-11-23 03:11:50,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:50,866 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2021-11-23 03:11:50,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:50,967 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2021-11-23 03:11:51,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:51,028 INFO L388 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 39 [2021-11-23 03:11:51,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:11:51,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:11:51,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-11-23 03:11:51,228 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-23 03:11:51,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 37 [2021-11-23 03:11:51,325 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:11:51,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 53 [2021-11-23 03:11:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:11:51,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:12:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:06,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:06,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370342444] [2021-11-23 03:12:06,846 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:12:06,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342470492] [2021-11-23 03:12:06,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342470492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:12:06,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1122778541] [2021-11-23 03:12:06,849 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:12:06,849 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:12:06,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:12:06,850 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:12:06,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:12:06,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:06,897 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:12:06,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2021-11-23 03:12:06,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:06,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:06,989 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:12:06,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:12:07,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:07,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:07,010 INFO L388 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 27 treesize of output 37 [2021-11-23 03:12:07,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:07,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:07,056 INFO L388 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 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-23 03:12:07,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:07,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:07,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:07,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:07,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:07,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:07,279 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 03:12:07,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 411 treesize of output 407 [2021-11-23 03:12:07,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:12:07,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:07,537 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:12:07,538 INFO L388 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 26 treesize of output 34 [2021-11-23 03:12:07,618 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:12:07,618 INFO L388 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 26 treesize of output 54 [2021-11-23 03:12:07,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:07,676 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:12:07,676 INFO L388 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 31 treesize of output 34 [2021-11-23 03:12:07,737 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:12:07,741 INFO L388 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 31 treesize of output 54 [2021-11-23 03:12:07,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:07,827 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:12:07,828 INFO L388 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 26 treesize of output 34 [2021-11-23 03:12:07,891 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:12:07,891 INFO L388 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 26 treesize of output 54 [2021-11-23 03:12:07,925 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:12:08,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '790#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:12:08,701 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:12:08,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:12:08,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-11-23 03:12:08,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594416449] [2021-11-23 03:12:08,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:12:08,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 03:12:08,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:08,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 03:12:08,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=841, Unknown=1, NotChecked=0, Total=930 [2021-11-23 03:12:08,703 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 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) [2021-11-23 03:12:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:13,822 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-11-23 03:12:13,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:12:13,824 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 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 [2021-11-23 03:12:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:13,824 INFO L225 Difference]: With dead ends: 36 [2021-11-23 03:12:13,824 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 03:12:13,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=113, Invalid=1076, Unknown=1, NotChecked=0, Total=1190 [2021-11-23 03:12:13,826 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:13,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 254 Invalid, 0 Unknown, 38 Unchecked, 1.5s Time] [2021-11-23 03:12:13,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 03:12:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-11-23 03:12:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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) [2021-11-23 03:12:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-23 03:12:13,834 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2021-11-23 03:12:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:13,834 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-23 03:12:13,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 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) [2021-11-23 03:12:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-23 03:12:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:12:13,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:13,835 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:13,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:12:14,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:14,037 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:14,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2119813775, now seen corresponding path program 5 times [2021-11-23 03:12:14,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:14,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93767239] [2021-11-23 03:12:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:14,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:14,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:12:14,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061672611] [2021-11-23 03:12:14,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:12:14,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:14,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:14,081 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:14,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:12:14,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:12:14,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:12:14,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:12:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:12:14,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:12:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:12:14,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:14,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93767239] [2021-11-23 03:12:14,360 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:12:14,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061672611] [2021-11-23 03:12:14,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061672611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:12:14,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431072895] [2021-11-23 03:12:14,364 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:12:14,364 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:12:14,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:12:14,365 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:12:14,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:12:14,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,459 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-23 03:12:14,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-23 03:12:14,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,562 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:12:14,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:12:14,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-23 03:12:14,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,640 INFO L388 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 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-23 03:12:14,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:14,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:14,914 INFO L354 Elim1Store]: treesize reduction 169, result has 11.5 percent of original size [2021-11-23 03:12:14,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 416 treesize of output 406 [2021-11-23 03:12:15,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:12:15,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:15,063 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:12:15,063 INFO L388 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 26 treesize of output 34 [2021-11-23 03:12:15,154 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:12:15,154 INFO L388 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 26 treesize of output 54 [2021-11-23 03:12:15,213 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:12:15,213 INFO L388 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 21 treesize of output 29 [2021-11-23 03:12:15,295 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:12:15,295 INFO L388 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 31 treesize of output 54 [2021-11-23 03:12:15,404 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:12:15,404 INFO L388 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 31 treesize of output 54 [2021-11-23 03:12:15,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:15,465 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:12:15,466 INFO L388 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 26 treesize of output 34 [2021-11-23 03:12:15,554 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:12:15,554 INFO L388 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 26 treesize of output 54 [2021-11-23 03:12:15,595 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:12:15,871 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1018#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:12:15,872 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:12:15,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:12:15,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-23 03:12:15,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372566505] [2021-11-23 03:12:15,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:12:15,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:12:15,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:15,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:12:15,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:12:15,874 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2021-11-23 03:12:16,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:16,127 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-11-23 03:12:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:12:16,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 17 [2021-11-23 03:12:16,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:16,129 INFO L225 Difference]: With dead ends: 41 [2021-11-23 03:12:16,129 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 03:12:16,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:12:16,130 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:16,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:12:16,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 03:12:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-11-23 03:12:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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) [2021-11-23 03:12:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-23 03:12:16,146 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-11-23 03:12:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:16,147 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-23 03:12:16,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2021-11-23 03:12:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-23 03:12:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:12:16,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:16,151 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:16,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:12:16,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:16,360 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:16,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:16,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1666458246, now seen corresponding path program 6 times [2021-11-23 03:12:16,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:16,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76824183] [2021-11-23 03:12:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:16,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:16,378 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:12:16,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681440384] [2021-11-23 03:12:16,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:12:16,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:16,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:16,380 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:16,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:12:16,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:12:16,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:12:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:12:16,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:12:16,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:12:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:12:16,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:16,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76824183] [2021-11-23 03:12:16,570 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:12:16,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681440384] [2021-11-23 03:12:16,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681440384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:12:16,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [807508789] [2021-11-23 03:12:16,574 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:12:16,574 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:12:16,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:12:16,575 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:12:16,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:12:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,673 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:12:16,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:12:16,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,691 INFO L388 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 27 treesize of output 37 [2021-11-23 03:12:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-23 03:12:16,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,742 INFO L388 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 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-23 03:12:16,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:16,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:16,943 INFO L354 Elim1Store]: treesize reduction 169, result has 11.5 percent of original size [2021-11-23 03:12:16,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 416 treesize of output 406 [2021-11-23 03:12:17,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:12:17,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:17,074 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:12:17,075 INFO L388 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 26 treesize of output 34 [2021-11-23 03:12:17,136 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:12:17,136 INFO L388 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 26 treesize of output 54 [2021-11-23 03:12:17,186 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:12:17,186 INFO L388 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 21 treesize of output 29 [2021-11-23 03:12:17,269 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:12:17,270 INFO L388 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 31 treesize of output 54 [2021-11-23 03:12:17,345 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:12:17,346 INFO L388 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 31 treesize of output 54 [2021-11-23 03:12:17,394 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:12:17,394 INFO L388 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 21 treesize of output 29 [2021-11-23 03:12:17,476 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:12:17,477 INFO L388 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 26 treesize of output 54 [2021-11-23 03:12:17,556 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:12:17,556 INFO L388 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 26 treesize of output 54 [2021-11-23 03:12:17,608 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:12:17,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1263#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:12:17,847 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:12:17,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:12:17,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-23 03:12:17,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421643100] [2021-11-23 03:12:17,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:12:17,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:12:17,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:17,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:12:17,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:12:17,848 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2021-11-23 03:12:17,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:17,995 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-11-23 03:12:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:12:17,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 17 [2021-11-23 03:12:17,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:17,996 INFO L225 Difference]: With dead ends: 42 [2021-11-23 03:12:17,996 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 03:12:17,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:12:17,998 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:17,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:12:17,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 03:12:18,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 03:12:18,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2021-11-23 03:12:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-23 03:12:18,005 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2021-11-23 03:12:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:18,006 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-23 03:12:18,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2021-11-23 03:12:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-23 03:12:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:12:18,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:18,007 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:18,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:12:18,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:18,228 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:18,229 INFO L85 PathProgramCache]: Analyzing trace with hash -72472683, now seen corresponding path program 7 times [2021-11-23 03:12:18,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:18,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391305388] [2021-11-23 03:12:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:18,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:18,247 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:12:18,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218322667] [2021-11-23 03:12:18,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:12:18,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:18,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:18,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:18,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:12:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:18,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 03:12:18,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:18,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:12:18,334 INFO L388 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 [2021-11-23 03:12:18,360 INFO L388 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 19 treesize of output 18 [2021-11-23 03:12:18,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,405 INFO L388 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 31 treesize of output 33 [2021-11-23 03:12:18,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,450 INFO L388 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 37 treesize of output 42 [2021-11-23 03:12:18,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-23 03:12:18,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2021-11-23 03:12:18,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-11-23 03:12:18,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:18,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2021-11-23 03:12:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:12:18,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 55 [2021-11-23 03:12:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:18,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2021-11-23 03:12:19,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:19,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2021-11-23 03:12:19,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:19,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:19,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:12:19,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-11-23 03:12:19,233 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-11-23 03:12:19,234 INFO L388 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 9 case distinctions, treesize of input 60 treesize of output 49 [2021-11-23 03:12:19,317 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:12:19,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 84 treesize of output 56 [2021-11-23 03:12:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:12:19,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:13:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:13:54,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:13:54,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391305388] [2021-11-23 03:13:54,283 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:13:54,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218322667] [2021-11-23 03:13:54,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218322667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:13:54,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [51220612] [2021-11-23 03:13:54,285 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:13:54,286 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:13:54,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:13:54,286 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:13:54,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:13:54,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,387 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:13:54,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:13:54,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,416 INFO L388 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 27 treesize of output 37 [2021-11-23 03:13:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-23 03:13:54,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,468 INFO L388 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 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-23 03:13:54,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:54,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:13:54,636 INFO L354 Elim1Store]: treesize reduction 169, result has 11.5 percent of original size [2021-11-23 03:13:54,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 416 treesize of output 406 [2021-11-23 03:13:54,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:13:54,756 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:13:54,757 INFO L388 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 21 treesize of output 29 [2021-11-23 03:13:54,824 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:13:54,825 INFO L388 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 26 treesize of output 54 [2021-11-23 03:13:54,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:54,892 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:13:54,893 INFO L388 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 31 treesize of output 34 [2021-11-23 03:13:54,968 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:13:54,969 INFO L388 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 31 treesize of output 54 [2021-11-23 03:13:54,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:13:55,024 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:13:55,024 INFO L388 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 26 treesize of output 34 [2021-11-23 03:13:55,084 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:13:55,084 INFO L388 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 26 treesize of output 54 [2021-11-23 03:13:55,122 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:13:57,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1535#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:13:57,872 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:13:57,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:13:57,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-11-23 03:13:57,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641132884] [2021-11-23 03:13:57,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:13:57,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 03:13:57,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:13:57,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 03:13:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1354, Unknown=15, NotChecked=0, Total=1482 [2021-11-23 03:13:57,875 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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) [2021-11-23 03:14:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:22,463 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-11-23 03:14:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:14:22,464 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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 [2021-11-23 03:14:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:22,464 INFO L225 Difference]: With dead ends: 45 [2021-11-23 03:14:22,465 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 03:14:22,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 115.9s TimeCoverageRelationStatistics Valid=148, Invalid=1729, Unknown=15, NotChecked=0, Total=1892 [2021-11-23 03:14:22,466 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:22,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 415 Invalid, 0 Unknown, 89 Unchecked, 4.8s Time] [2021-11-23 03:14:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 03:14:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-11-23 03:14:22,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 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) [2021-11-23 03:14:22,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-23 03:14:22,476 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2021-11-23 03:14:22,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:22,476 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-23 03:14:22,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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) [2021-11-23 03:14:22,477 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-23 03:14:22,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:14:22,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:22,478 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:22,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:22,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:22,701 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1317708229, now seen corresponding path program 8 times [2021-11-23 03:14:22,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:22,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817601238] [2021-11-23 03:14:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:22,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:22,720 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:14:22,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115834735] [2021-11-23 03:14:22,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:14:22,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:22,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:22,722 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:22,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:14:22,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:14:22,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:22,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:22,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:14:22,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:14:22,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:22,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817601238] [2021-11-23 03:14:22,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:14:22,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115834735] [2021-11-23 03:14:22,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115834735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:22,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668159312] [2021-11-23 03:14:22,998 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:14:22,998 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:14:22,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:14:22,999 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:14:22,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:14:23,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,106 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:14:23,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:14:23,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-23 03:14:23,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,143 INFO L388 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 27 treesize of output 37 [2021-11-23 03:14:23,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,181 INFO L388 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 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-23 03:14:23,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:14:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:14:23,348 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 03:14:23,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 411 treesize of output 407 [2021-11-23 03:14:23,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:14:23,491 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:14:23,492 INFO L388 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 21 treesize of output 29 [2021-11-23 03:14:23,554 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:14:23,555 INFO L388 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 26 treesize of output 54 [2021-11-23 03:14:23,617 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:14:23,618 INFO L388 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 26 treesize of output 54 [2021-11-23 03:14:23,696 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:14:23,696 INFO L388 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 21 treesize of output 29 [2021-11-23 03:14:23,758 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:14:23,758 INFO L388 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 31 treesize of output 54 [2021-11-23 03:14:23,814 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:14:23,815 INFO L388 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 31 treesize of output 54 [2021-11-23 03:14:23,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:14:23,863 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:14:23,863 INFO L388 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 26 treesize of output 34 [2021-11-23 03:14:23,932 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:14:23,933 INFO L388 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 26 treesize of output 54 [2021-11-23 03:14:23,953 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:14:24,172 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1822#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:14:24,172 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:14:24,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:14:24,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-23 03:14:24,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700400486] [2021-11-23 03:14:24,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:24,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:14:24,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:14:24,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:14:24,174 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-11-23 03:14:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:24,400 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-11-23 03:14:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:14:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) Word has length 21 [2021-11-23 03:14:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:24,401 INFO L225 Difference]: With dead ends: 51 [2021-11-23 03:14:24,401 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 03:14:24,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:14:24,403 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:24,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 6 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:14:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 03:14:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-11-23 03:14:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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) [2021-11-23 03:14:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-11-23 03:14:24,413 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2021-11-23 03:14:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:24,414 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-11-23 03:14:24,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-11-23 03:14:24,414 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-11-23 03:14:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:14:24,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:24,415 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:24,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:24,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:24,629 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:24,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2048008538, now seen corresponding path program 9 times [2021-11-23 03:14:24,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:24,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804438783] [2021-11-23 03:14:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:24,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:24,650 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:14:24,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760175112] [2021-11-23 03:14:24,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:14:24,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:24,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:24,654 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:24,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:14:24,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:14:24,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:14:24,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:14:24,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:14:24,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:14:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:14:24,932 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:24,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804438783] [2021-11-23 03:14:24,932 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:14:24,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760175112] [2021-11-23 03:14:24,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760175112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:14:24,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [257437760] [2021-11-23 03:14:24,934 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:14:24,934 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:14:24,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:14:24,935 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:14:24,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:14:24,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:24,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,031 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-23 03:14:25,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-23 03:14:25,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,135 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:14:25,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:14:25,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-23 03:14:25,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,199 INFO L388 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 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-23 03:14:25,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:25,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:14:25,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:14:25,377 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 03:14:25,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 411 treesize of output 407 [2021-11-23 03:14:25,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:14:25,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:14:25,574 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:14:25,574 INFO L388 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 26 treesize of output 34 [2021-11-23 03:14:25,637 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:14:25,637 INFO L388 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 26 treesize of output 54 [2021-11-23 03:14:25,680 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:14:25,680 INFO L388 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 21 treesize of output 29 [2021-11-23 03:14:25,737 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:14:25,737 INFO L388 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 31 treesize of output 54 [2021-11-23 03:14:25,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:14:25,803 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:14:25,804 INFO L388 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 26 treesize of output 34 [2021-11-23 03:14:25,879 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:14:25,879 INFO L388 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 26 treesize of output 54 [2021-11-23 03:14:25,912 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:14:26,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2128#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:14:26,183 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:14:26,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:14:26,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-23 03:14:26,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274035472] [2021-11-23 03:14:26,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:14:26,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:14:26,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:26,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:14:26,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:14:26,185 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-11-23 03:14:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:26,360 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-11-23 03:14:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:14:26,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) Word has length 21 [2021-11-23 03:14:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:26,361 INFO L225 Difference]: With dead ends: 51 [2021-11-23 03:14:26,361 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 03:14:26,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:14:26,363 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:26,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:14:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 03:14:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 03:14:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2021-11-23 03:14:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-23 03:14:26,370 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2021-11-23 03:14:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:26,371 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-23 03:14:26,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-11-23 03:14:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-23 03:14:26,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:14:26,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:26,372 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:26,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:14:26,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:26,572 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:26,573 INFO L85 PathProgramCache]: Analyzing trace with hash 992060457, now seen corresponding path program 10 times [2021-11-23 03:14:26,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:26,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436585412] [2021-11-23 03:14:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:26,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:26,592 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:14:26,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658468702] [2021-11-23 03:14:26,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:14:26,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:14:26,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:26,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:14:26,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:14:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:26,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-23 03:14:26,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:14:26,749 INFO L388 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 [2021-11-23 03:14:26,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:14:26,779 INFO L388 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 24 treesize of output 23 [2021-11-23 03:14:26,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:26,813 INFO L388 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 28 treesize of output 30 [2021-11-23 03:14:26,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:26,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:26,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:26,859 INFO L388 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 37 treesize of output 42 [2021-11-23 03:14:26,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:26,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:26,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:26,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:26,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:26,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:26,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 46 treesize of output 54 [2021-11-23 03:14:27,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:14:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2021-11-23 03:14:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2021-11-23 03:14:27,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 63 [2021-11-23 03:14:27,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2021-11-23 03:14:27,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 61 [2021-11-23 03:14:27,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 63 [2021-11-23 03:14:27,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:14:27,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 68 [2021-11-23 03:14:27,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-23 03:14:27,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:27,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2021-11-23 03:14:28,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:14:28,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2021-11-23 03:14:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:14:28,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:14:28,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 70 [2021-11-23 03:14:28,322 INFO L354 Elim1Store]: treesize reduction 152, result has 16.0 percent of original size [2021-11-23 03:14:28,322 INFO L388 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 14 case distinctions, treesize of input 88 treesize of output 64 [2021-11-23 03:14:28,451 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-23 03:14:28,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 102 treesize of output 62 [2021-11-23 03:14:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:14:28,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:18:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:18:54,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:18:54,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436585412] [2021-11-23 03:18:54,611 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:18:54,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658468702] [2021-11-23 03:18:54,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658468702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:18:54,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932389189] [2021-11-23 03:18:54,613 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:18:54,613 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:18:54,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:18:54,614 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:18:54,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:18:54,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,655 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:18:54,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2021-11-23 03:18:54,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,777 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:18:54,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:18:54,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,797 INFO L388 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 27 treesize of output 37 [2021-11-23 03:18:54,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,836 INFO L388 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 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-23 03:18:54,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:18:54,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:18:54,991 INFO L354 Elim1Store]: treesize reduction 169, result has 11.5 percent of original size [2021-11-23 03:18:54,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 416 treesize of output 406 [2021-11-23 03:18:55,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:18:55,096 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:18:55,097 INFO L388 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 21 treesize of output 29 [2021-11-23 03:18:55,195 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:18:55,195 INFO L388 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 26 treesize of output 54 [2021-11-23 03:18:55,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:18:55,259 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:18:55,259 INFO L388 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 31 treesize of output 34 [2021-11-23 03:18:55,317 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:18:55,317 INFO L388 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 31 treesize of output 54 [2021-11-23 03:18:55,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:18:55,371 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:18:55,372 INFO L388 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 26 treesize of output 34 [2021-11-23 03:18:55,429 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:18:55,429 INFO L388 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 26 treesize of output 54 [2021-11-23 03:18:55,449 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:19:04,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2460#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:19:04,716 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:19:04,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:19:04,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-11-23 03:19:04,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675945098] [2021-11-23 03:19:04,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:19:04,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 03:19:04,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:19:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 03:19:04,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1973, Unknown=50, NotChecked=0, Total=2162 [2021-11-23 03:19:04,718 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 43 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 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) [2021-11-23 03:19:39,123 WARN L227 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 142 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:19:42,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:19:44,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:19:46,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:19:48,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:19:50,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:20:50,450 WARN L227 SmtUtils]: Spent 24.62s on a formula simplification. DAG size of input: 180 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:21:25,480 WARN L227 SmtUtils]: Spent 17.25s on a formula simplification. DAG size of input: 155 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:21:43,610 WARN L227 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 130 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:21:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:55,533 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-11-23 03:21:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 03:21:55,533 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 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 24 [2021-11-23 03:21:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:55,534 INFO L225 Difference]: With dead ends: 54 [2021-11-23 03:21:55,534 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 03:21:55,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 412.0s TimeCoverageRelationStatistics Valid=186, Invalid=2504, Unknown=66, NotChecked=0, Total=2756 [2021-11-23 03:21:55,536 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 31 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:55,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 566 Invalid, 5 Unknown, 146 Unchecked, 26.4s Time] [2021-11-23 03:21:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 03:21:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-11-23 03:21:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 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) [2021-11-23 03:21:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-11-23 03:21:55,552 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 24 [2021-11-23 03:21:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:55,553 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-11-23 03:21:55,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 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) [2021-11-23 03:21:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-11-23 03:21:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:21:55,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:55,554 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:55,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:21:55,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 03:21:55,761 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:55,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:55,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1216276529, now seen corresponding path program 11 times [2021-11-23 03:21:55,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:55,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045078881] [2021-11-23 03:21:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:55,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:55,774 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:21:55,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694928128] [2021-11-23 03:21:55,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:21:55,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:55,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:21:55,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:21:55,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:21:56,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:21:56,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:21:56,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:21:56,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:21:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:21:56,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:21:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:21:56,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:56,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045078881] [2021-11-23 03:21:56,258 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:21:56,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694928128] [2021-11-23 03:21:56,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694928128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:21:56,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1202804075] [2021-11-23 03:21:56,260 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:21:56,260 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:21:56,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:21:56,260 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:21:56,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:21:56,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,343 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-23 03:21:56,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-23 03:21:56,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,432 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:21:56,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:21:56,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-23 03:21:56,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,491 INFO L388 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 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-23 03:21:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:56,629 INFO L354 Elim1Store]: treesize reduction 169, result has 11.5 percent of original size [2021-11-23 03:21:56,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 416 treesize of output 406 [2021-11-23 03:21:56,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:21:56,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:56,727 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:21:56,727 INFO L388 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 26 treesize of output 34 [2021-11-23 03:21:56,795 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:21:56,796 INFO L388 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 26 treesize of output 54 [2021-11-23 03:21:56,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:56,843 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:21:56,844 INFO L388 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 31 treesize of output 34 [2021-11-23 03:21:56,908 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:21:56,908 INFO L388 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 31 treesize of output 54 [2021-11-23 03:21:56,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:56,961 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:21:56,961 INFO L388 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 26 treesize of output 34 [2021-11-23 03:21:57,043 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:21:57,043 INFO L388 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 26 treesize of output 54 [2021-11-23 03:21:57,064 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:21:57,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2806#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:21:57,355 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:21:57,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:21:57,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-23 03:21:57,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959751087] [2021-11-23 03:21:57,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:21:57,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:21:57,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:57,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:21:57,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:21:57,357 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-11-23 03:21:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:57,799 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-11-23 03:21:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:21:57,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 25 [2021-11-23 03:21:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:57,800 INFO L225 Difference]: With dead ends: 61 [2021-11-23 03:21:57,800 INFO L226 Difference]: Without dead ends: 48 [2021-11-23 03:21:57,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-11-23 03:21:57,801 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:57,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:21:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-23 03:21:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2021-11-23 03:21:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 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) [2021-11-23 03:21:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-23 03:21:57,814 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2021-11-23 03:21:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:57,814 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-23 03:21:57,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-11-23 03:21:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-23 03:21:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:21:57,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:57,816 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:57,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:21:58,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:58,020 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:58,021 INFO L85 PathProgramCache]: Analyzing trace with hash 688797510, now seen corresponding path program 12 times [2021-11-23 03:21:58,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:58,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261383595] [2021-11-23 03:21:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:58,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:58,051 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:21:58,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655262999] [2021-11-23 03:21:58,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:21:58,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:21:58,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:21:58,062 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:21:58,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:21:58,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:21:58,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:21:58,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:21:58,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:21:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:21:58,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:21:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:21:58,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:58,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261383595] [2021-11-23 03:21:58,408 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:21:58,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655262999] [2021-11-23 03:21:58,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655262999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:21:58,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317698968] [2021-11-23 03:21:58,410 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:21:58,410 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:21:58,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:21:58,411 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:21:58,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:21:58,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,505 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-23 03:21:58,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-23 03:21:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,521 INFO L388 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 27 treesize of output 37 [2021-11-23 03:21:58,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2021-11-23 03:21:58,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,573 INFO L388 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 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-23 03:21:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:58,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:21:58,726 INFO L354 Elim1Store]: treesize reduction 169, result has 11.5 percent of original size [2021-11-23 03:21:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 416 treesize of output 406 [2021-11-23 03:21:58,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:21:58,839 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:21:58,839 INFO L388 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 21 treesize of output 29 [2021-11-23 03:21:58,918 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:21:58,919 INFO L388 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 26 treesize of output 54 [2021-11-23 03:21:59,000 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:21:59,001 INFO L388 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 26 treesize of output 54 [2021-11-23 03:21:59,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:59,049 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-23 03:21:59,049 INFO L388 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 31 treesize of output 34 [2021-11-23 03:21:59,107 INFO L354 Elim1Store]: treesize reduction 21, result has 65.6 percent of original size [2021-11-23 03:21:59,107 INFO L388 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 31 treesize of output 54 [2021-11-23 03:21:59,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:21:59,156 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-23 03:21:59,156 INFO L388 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 26 treesize of output 34 [2021-11-23 03:21:59,229 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-23 03:21:59,229 INFO L388 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 26 treesize of output 54 [2021-11-23 03:21:59,250 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:21:59,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3173#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem16#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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:21:59,549 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:21:59,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:21:59,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-23 03:21:59,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986015609] [2021-11-23 03:21:59,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:21:59,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:21:59,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:59,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:21:59,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:21:59,551 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-11-23 03:21:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:59,843 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-11-23 03:21:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:21:59,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 25 [2021-11-23 03:21:59,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:59,844 INFO L225 Difference]: With dead ends: 60 [2021-11-23 03:21:59,844 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 03:21:59,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:21:59,846 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:59,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:21:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 03:21:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-23 03:21:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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) [2021-11-23 03:21:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-23 03:21:59,855 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2021-11-23 03:21:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:59,855 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-23 03:21:59,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-11-23 03:21:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-23 03:21:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:21:59,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:59,857 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:59,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:22:00,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 03:22:00,073 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:22:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:22:00,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1689346091, now seen corresponding path program 13 times [2021-11-23 03:22:00,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:22:00,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935454814] [2021-11-23 03:22:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:22:00,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:22:00,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:22:00,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003141449] [2021-11-23 03:22:00,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:22:00,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:22:00,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:22:00,092 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:22:00,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c662d02c-52d9-4211-8e2f-e0aa5004eedf/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 03:22:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:22:00,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-23 03:22:00,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:22:00,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:22:00,202 INFO L388 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 [2021-11-23 03:22:00,225 INFO L388 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 24 treesize of output 23 [2021-11-23 03:22:00,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,252 INFO L388 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 28 treesize of output 30 [2021-11-23 03:22:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,287 INFO L388 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 37 treesize of output 42 [2021-11-23 03:22:00,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 49 treesize of output 57 [2021-11-23 03:22:00,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2021-11-23 03:22:00,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:22:00,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 76 [2021-11-23 03:22:00,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:22:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 79 [2021-11-23 03:22:00,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2021-11-23 03:22:00,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:22:00,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 79 [2021-11-23 03:22:00,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:00,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2021-11-23 03:22:01,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:22:01,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 76 [2021-11-23 03:22:01,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:22:01,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 79 [2021-11-23 03:22:01,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:22:01,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2021-11-23 03:22:01,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 73 [2021-11-23 03:22:01,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 75 [2021-11-23 03:22:01,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:22:01,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:01,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 82 [2021-11-23 03:22:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:22:02,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 93 [2021-11-23 03:22:02,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 76 [2021-11-23 03:22:02,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:22:02,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:22:02,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 83 [2021-11-23 03:22:02,401 INFO L354 Elim1Store]: treesize reduction 190, result has 15.9 percent of original size [2021-11-23 03:22:02,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 89 treesize of output 72 [2021-11-23 03:22:02,505 INFO L354 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2021-11-23 03:22:02,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 92 treesize of output 60 [2021-11-23 03:22:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:22:02,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:25:01,848 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) (let ((.cse26 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8)) 1))) (let ((.cse24 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse26))) (let ((.cse25 (select .cse24 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse22 (select .cse26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse23 (select .cse25 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse10 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (let ((.cse19 (select (select (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse25 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse22 .cse23))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10)) (.cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 16))) (let ((.cse20 (select (select (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse25 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse19 .cse22 .cse23))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9)) (.cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (let ((.cse21 (select (select (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse25 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse19 .cse20 .cse22 .cse23))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8)) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 32))) (let ((.cse18 (select (select (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse25 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse19 .cse20 .cse21 .cse22 .cse23))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse12 (store .cse24 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse25 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse18 .cse19 .cse20 .cse21 .cse22 .cse23))))) (let ((.cse11 (let ((.cse13 (let ((.cse14 (let ((.cse15 (let ((.cse16 (let ((.cse17 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse17 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse17 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse18 .cse19 .cse20 .cse21 .cse22 .cse23))))) (store .cse16 .cse10 (+ (select (select (store .cse12 |c_ULTIMATE.start_main_~a~0#1.base| .cse16) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse16 .cse10)))))) (store .cse15 .cse9 (+ (select .cse15 .cse9) (select (select (store .cse12 |c_ULTIMATE.start_main_~a~0#1.base| .cse15) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse14 .cse8 (+ (select .cse14 .cse8) (select (select (store .cse12 |c_ULTIMATE.start_main_~a~0#1.base| .cse14) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse13 .cse7 (+ (select .cse13 .cse7) (select (select (store .cse12 |c_ULTIMATE.start_main_~a~0#1.base| .cse13) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (let ((.cse2 (store .cse12 |c_ULTIMATE.start_main_~a~0#1.base| .cse11))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse11 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse1 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse5 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10))) (let ((.cse4 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse6 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse4 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (+ .cse0 .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse1 .cse4 .cse5 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7) .cse4 .cse5 .cse6)))))))))))))))))) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0))) is different from false