./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW --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 904ada5b631ac9ba69e93f7c5eb51a71b3a5f4ed245a1ea57aa3fec5e9b98c37 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:30:17,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:30:17,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:30:17,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:30:17,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:30:17,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:30:17,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:30:17,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:30:17,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:30:17,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:30:17,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:30:17,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:30:17,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:30:17,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:30:17,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:30:17,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:30:17,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:30:17,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:30:17,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:30:17,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:30:17,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:30:17,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:30:17,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:30:17,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:30:17,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:30:17,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:30:17,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:30:17,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:30:17,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:30:17,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:30:17,612 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:30:17,613 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:30:17,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:30:17,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:30:17,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:30:17,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:30:17,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:30:17,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:30:17,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:30:17,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:30:17,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:30:17,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:30:17,676 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:30:17,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:30:17,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:30:17,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:30:17,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:30:17,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:30:17,679 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:30:17,679 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:30:17,679 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:30:17,680 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:30:17,681 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:30:17,681 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:30:17,681 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:30:17,681 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:30:17,681 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:30:17,682 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:30:17,682 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:30:17,682 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:30:17,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:30:17,684 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:30:17,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:30:17,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:30:17,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:30:17,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:30:17,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:30:17,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:30:17,686 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:30:17,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:30:17,686 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:30:17,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:30:17,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:30:17,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:30:17,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:30:17,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:30:17,688 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:30:17,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:30:17,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:30:17,688 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:30:17,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:30:17,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:30:17,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:30:17,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 904ada5b631ac9ba69e93f7c5eb51a71b3a5f4ed245a1ea57aa3fec5e9b98c37 [2022-11-23 15:30:17,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:30:17,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:30:18,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:30:18,003 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:30:18,003 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:30:18,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i [2022-11-23 15:30:21,083 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:30:21,290 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:30:21,291 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i [2022-11-23 15:30:21,298 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/data/3df27fbb7/280ddc1825c8496dbbcf86c69b194a0e/FLAG6078ac438 [2022-11-23 15:30:21,315 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/data/3df27fbb7/280ddc1825c8496dbbcf86c69b194a0e [2022-11-23 15:30:21,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:30:21,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:30:21,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:30:21,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:30:21,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:30:21,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1517414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21, skipping insertion in model container [2022-11-23 15:30:21,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:30:21,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:30:21,518 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i[816,829] [2022-11-23 15:30:21,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:30:21,550 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:30:21,560 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i[816,829] [2022-11-23 15:30:21,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:30:21,591 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:30:21,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21 WrapperNode [2022-11-23 15:30:21,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:30:21,593 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:30:21,593 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:30:21,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:30:21,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,639 INFO L138 Inliner]: procedures = 16, calls = 59, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 195 [2022-11-23 15:30:21,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:30:21,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:30:21,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:30:21,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:30:21,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,675 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:30:21,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:30:21,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:30:21,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:30:21,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (1/1) ... [2022-11-23 15:30:21,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:30:21,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:30:21,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:30:21,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:30:21,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:30:21,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:30:21,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:30:21,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:30:21,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:30:21,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:30:21,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:30:21,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:30:21,907 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:30:21,909 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:30:22,329 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:30:22,418 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:30:22,418 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-23 15:30:22,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:30:22 BoogieIcfgContainer [2022-11-23 15:30:22,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:30:22,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:30:22,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:30:22,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:30:22,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:30:21" (1/3) ... [2022-11-23 15:30:22,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ef7408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:30:22, skipping insertion in model container [2022-11-23 15:30:22,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:21" (2/3) ... [2022-11-23 15:30:22,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ef7408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:30:22, skipping insertion in model container [2022-11-23 15:30:22,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:30:22" (3/3) ... [2022-11-23 15:30:22,430 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2022-11-23 15:30:22,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:30:22,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:30:22,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:30:22,549 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4fecde38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:30:22,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:30:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 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) [2022-11-23 15:30:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 15:30:22,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:22,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:22,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:30:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:22,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1505914239, now seen corresponding path program 1 times [2022-11-23 15:30:22,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:22,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968153207] [2022-11-23 15:30:22,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:22,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:30:22,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:22,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968153207] [2022-11-23 15:30:22,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968153207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:30:22,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:30:22,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:30:22,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586915009] [2022-11-23 15:30:22,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:30:22,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:30:22,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:23,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:30:23,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:30:23,019 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:23,151 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2022-11-23 15:30:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:30:23,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 15:30:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:23,161 INFO L225 Difference]: With dead ends: 33 [2022-11-23 15:30:23,162 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 15:30:23,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:30:23,169 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:23,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:30:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 15:30:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 15:30:23,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2022-11-23 15:30:23,207 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 14 [2022-11-23 15:30:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:23,209 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2022-11-23 15:30:23,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2022-11-23 15:30:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 15:30:23,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:23,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:23,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:30:23,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:30:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash 80859531, now seen corresponding path program 1 times [2022-11-23 15:30:23,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:23,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035115618] [2022-11-23 15:30:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:23,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:30:23,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:23,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035115618] [2022-11-23 15:30:23,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035115618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:30:23,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790507217] [2022-11-23 15:30:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:23,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:30:23,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:30:23,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:30:23,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:30:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:23,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:30:23,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:30:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:30:23,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:30:23,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790507217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:30:23,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:30:23,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 15:30:23,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402843544] [2022-11-23 15:30:23,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:30:23,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:30:23,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:23,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:30:23,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:30:23,685 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:23,763 INFO L93 Difference]: Finished difference Result 39 states and 66 transitions. [2022-11-23 15:30:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:30:23,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 15:30:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:23,765 INFO L225 Difference]: With dead ends: 39 [2022-11-23 15:30:23,765 INFO L226 Difference]: Without dead ends: 26 [2022-11-23 15:30:23,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:30:23,767 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:23,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:30:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-23 15:30:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-23 15:30:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-11-23 15:30:23,774 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 15 [2022-11-23 15:30:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:23,774 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-11-23 15:30:23,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-11-23 15:30:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 15:30:23,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:23,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:23,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:30:23,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:30:23,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:30:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1229820764, now seen corresponding path program 1 times [2022-11-23 15:30:23,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:23,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669068536] [2022-11-23 15:30:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:23,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:30:24,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:24,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669068536] [2022-11-23 15:30:24,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669068536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:30:24,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338454156] [2022-11-23 15:30:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:24,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:30:24,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:30:24,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:30:24,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:30:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:24,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:30:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:30:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:30:24,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:30:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:30:24,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338454156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:30:24,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537010849] [2022-11-23 15:30:24,500 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:30:24,501 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:30:24,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:30:24,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:30:24,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:30:24,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:24,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:24,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:24,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:24,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:24,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:24,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:24,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:24,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:24,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:25,636 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 15:30:25,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 15:30:25,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:25,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:25,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:25,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:25,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:25,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:25,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:27,077 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 15:30:27,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 15:30:27,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:27,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:27,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:30:28,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:28,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:28,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:28,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:28,794 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:30:28,795 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-23 15:30:31,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:31,760 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:30:31,760 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:30:31,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:31,808 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:31,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:31,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:31,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:31,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:31,889 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:31,890 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:31,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:31,988 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:31,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:32,070 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:32,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:32,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,179 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:30:32,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:30:32,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,307 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:32,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:32,382 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:32,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:32,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,497 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:30:32,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:30:32,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,600 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:32,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:32,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,642 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:32,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:32,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,716 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:32,717 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:32,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,775 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:32,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:32,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,813 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:32,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:32,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,882 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:32,883 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,952 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:32,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:32,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:32,987 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:32,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:33,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:33,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,079 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:33,080 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:33,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,176 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:33,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:33,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,249 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:33,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:33,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,319 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:33,319 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:33,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,387 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:33,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:33,418 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:33,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:33,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,547 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:30:33,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:30:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,732 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:33,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:33,779 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:33,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:33,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:33,898 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:30:33,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:30:33,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:34,009 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:34,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:34,043 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:30:34,569 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:30:34,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:30:34,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:30:34,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 15:30:34,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529638631] [2022-11-23 15:30:34,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:30:34,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:30:34,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:34,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:30:34,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:30:34,571 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:34,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:34,677 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2022-11-23 15:30:34,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:30:34,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 24 [2022-11-23 15:30:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:34,678 INFO L225 Difference]: With dead ends: 52 [2022-11-23 15:30:34,678 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 15:30:34,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:30:34,680 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:34,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:30:34,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 15:30:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-23 15:30:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-11-23 15:30:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-23 15:30:34,686 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-11-23 15:30:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:34,687 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-23 15:30:34,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-23 15:30:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 15:30:34,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:34,688 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:34,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:30:34,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:30:34,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:30:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:34,891 INFO L85 PathProgramCache]: Analyzing trace with hash -911678298, now seen corresponding path program 2 times [2022-11-23 15:30:34,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:34,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11621061] [2022-11-23 15:30:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:34,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 15:30:35,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:35,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11621061] [2022-11-23 15:30:35,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11621061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:30:35,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281443951] [2022-11-23 15:30:35,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:30:35,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:30:35,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:30:35,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:30:35,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:30:35,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:30:35,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:30:35,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:30:35,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:30:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 15:30:35,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:30:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 15:30:35,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281443951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:30:35,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081732438] [2022-11-23 15:30:35,312 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:30:35,320 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:30:35,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:30:35,321 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:30:35,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:30:35,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:35,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:35,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:35,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:35,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:35,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:35,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:35,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:35,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:35,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:36,158 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 15:30:36,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 15:30:36,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:36,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:36,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:36,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:36,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:37,305 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 15:30:37,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 15:30:37,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:37,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:37,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 15:30:38,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:38,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:38,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:38,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:38,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:38,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:38,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:38,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:38,096 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:30:38,097 INFO L350 Elim1Store]: Elim1 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 7 case distinctions, treesize of input 1040 treesize of output 1008 [2022-11-23 15:30:38,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:38,497 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:30:38,498 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:30:38,539 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:38,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:38,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:38,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:38,645 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:30:38,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:30:38,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:38,750 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:38,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:38,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:38,787 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:38,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:38,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:38,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:38,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:38,858 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:38,859 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:38,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:38,926 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:38,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:38,961 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:38,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:39,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,060 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:30:39,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:30:39,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,136 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:39,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:39,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,171 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:39,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:39,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,244 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:39,245 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,304 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:39,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:39,339 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:39,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:39,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,440 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:30:39,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:30:39,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,537 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:39,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:39,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,568 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:39,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:39,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:39,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,640 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:39,640 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:39,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,746 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:39,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:39,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,803 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:39,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:39,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,869 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:39,870 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:39,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,932 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:39,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:39,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:39,963 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:39,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:40,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:40,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:40,031 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:40,031 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:40,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:40,109 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:40,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:40,172 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:40,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:40,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:40,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:40,288 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:30:40,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:30:40,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:40,386 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:40,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:40,415 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:30:40,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '731#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:30:40,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:30:40,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:30:40,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 15:30:40,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116871073] [2022-11-23 15:30:40,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:30:40,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:30:40,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:40,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:30:40,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:30:40,879 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:41,076 INFO L93 Difference]: Finished difference Result 77 states and 122 transitions. [2022-11-23 15:30:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:30:41,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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 27 [2022-11-23 15:30:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:41,079 INFO L225 Difference]: With dead ends: 77 [2022-11-23 15:30:41,079 INFO L226 Difference]: Without dead ends: 56 [2022-11-23 15:30:41,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:30:41,080 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:41,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:30:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-23 15:30:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-23 15:30:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:41,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-23 15:30:41,088 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2022-11-23 15:30:41,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:41,088 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-23 15:30:41,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:41,089 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-23 15:30:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 15:30:41,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:41,095 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:41,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:30:41,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:30:41,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:30:41,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:41,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2146685505, now seen corresponding path program 3 times [2022-11-23 15:30:41,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:41,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64262094] [2022-11-23 15:30:41,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:41,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 15:30:41,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:41,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64262094] [2022-11-23 15:30:41,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64262094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:30:41,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538193230] [2022-11-23 15:30:41,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:30:41,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:30:41,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:30:41,562 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:30:41,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:30:41,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:30:41,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:30:41,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:30:41,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:30:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 15:30:41,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:30:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 15:30:41,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538193230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:30:41,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886513271] [2022-11-23 15:30:41,849 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:30:41,849 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:30:41,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:30:41,849 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:30:41,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:30:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:41,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:41,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:41,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:41,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:41,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:41,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:42,601 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 15:30:42,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 15:30:42,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:42,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:42,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:42,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:42,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:42,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:43,691 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 15:30:43,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 15:30:43,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:43,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:43,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:30:44,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:44,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:44,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:44,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:44,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:44,418 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:30:44,419 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-23 15:30:46,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:46,597 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:30:46,597 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:30:46,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:46,640 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:46,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:46,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:46,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:46,707 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:46,707 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:46,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:46,789 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:46,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:46,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:46,854 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:46,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:46,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:46,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:46,927 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:46,927 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:46,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:46,989 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:46,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:47,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,022 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:47,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:47,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:47,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,082 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:47,082 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:47,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,184 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:47,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:47,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,243 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:47,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:47,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:47,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,312 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:47,312 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:47,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,380 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:47,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:47,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,419 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:47,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:47,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:47,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,485 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:47,486 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:47,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,550 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:47,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:47,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,584 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:47,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:47,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:47,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,651 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:47,651 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:47,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,739 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:47,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:47,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,793 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:47,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:47,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,860 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:47,861 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:47,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,923 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:47,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:47,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:47,956 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:47,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:48,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:48,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:48,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:48,026 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:48,026 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:48,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:48,117 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:48,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:48,173 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:48,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:48,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:48,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:48,267 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:30:48,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:30:48,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:48,334 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:48,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:48,358 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:30:48,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1319#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:30:48,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:30:48,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:30:48,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 15:30:48,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642074167] [2022-11-23 15:30:48,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:30:48,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:30:48,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:30:48,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:30:48,876 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:48,965 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2022-11-23 15:30:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:30:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-23 15:30:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:48,967 INFO L225 Difference]: With dead ends: 112 [2022-11-23 15:30:48,967 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 15:30:48,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:30:48,968 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:48,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:30:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 15:30:48,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-23 15:30:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:48,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-11-23 15:30:48,977 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 54 [2022-11-23 15:30:48,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:48,977 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-11-23 15:30:48,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-11-23 15:30:48,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 15:30:48,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:48,979 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:48,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 15:30:49,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:30:49,183 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:30:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash -789133823, now seen corresponding path program 4 times [2022-11-23 15:30:49,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:49,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826614550] [2022-11-23 15:30:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 15:30:49,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826614550] [2022-11-23 15:30:49,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826614550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:30:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931132666] [2022-11-23 15:30:49,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:30:49,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:30:49,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:30:49,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:30:49,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:30:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:49,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:30:49,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:30:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 15:30:50,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:30:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 15:30:50,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931132666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:30:50,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133587641] [2022-11-23 15:30:50,237 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:30:50,237 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:30:50,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:30:50,238 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:30:50,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:30:50,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:50,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:50,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:50,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:50,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:50,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:50,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:50,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:50,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,343 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 15:30:51,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 15:30:51,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-23 15:30:51,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:51,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:30:52,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:52,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:52,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:52,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:52,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:52,168 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:30:52,168 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-23 15:30:54,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:54,224 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:30:54,225 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:30:54,260 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:54,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:54,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:54,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:54,353 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:30:54,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:30:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:54,445 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:54,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:54,478 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:54,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:54,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:54,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:54,576 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:30:54,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:30:54,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:54,671 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:54,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:54,707 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:54,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:54,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:54,839 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:30:54,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:30:54,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:54,929 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:54,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:54,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:54,960 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:54,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:55,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:55,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,027 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:55,027 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:55,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,086 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:55,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:55,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,119 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:55,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:55,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,177 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:55,177 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:55,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,238 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:55,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:55,271 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:55,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:55,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,354 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:30:55,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:30:55,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,456 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:55,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:55,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,504 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:55,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:55,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,572 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:30:55,572 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:30:55,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,633 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:55,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:55,665 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:55,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:55,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,769 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:30:55,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:30:55,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,847 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:55,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:55,886 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:30:55,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:30:55,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:55,994 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:30:55,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:30:56,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:30:56,104 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:30:56,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:30:56,142 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:30:56,571 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2037#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:30:56,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:30:56,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:30:56,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 15:30:56,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138264062] [2022-11-23 15:30:56,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:30:56,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 15:30:56,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:56,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 15:30:56,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:30:56,574 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:30:56,714 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2022-11-23 15:30:56,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 15:30:56,715 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-23 15:30:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:30:56,716 INFO L225 Difference]: With dead ends: 124 [2022-11-23 15:30:56,716 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 15:30:56,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:30:56,718 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:30:56,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:30:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 15:30:56,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-23 15:30:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-11-23 15:30:56,728 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 60 [2022-11-23 15:30:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:30:56,728 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-11-23 15:30:56,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-11-23 15:30:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 15:30:56,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:30:56,731 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:30:56,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:30:56,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:30:56,931 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:30:56,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:30:56,932 INFO L85 PathProgramCache]: Analyzing trace with hash 785857921, now seen corresponding path program 5 times [2022-11-23 15:30:56,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:30:56,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437584700] [2022-11-23 15:30:56,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:30:56,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:30:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:30:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 15:30:57,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:30:57,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437584700] [2022-11-23 15:30:57,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437584700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:30:57,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255677389] [2022-11-23 15:30:57,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:30:57,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:30:57,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:30:57,935 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:30:57,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:30:58,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:30:58,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:30:58,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:30:58,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:30:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-23 15:30:58,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:30:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-23 15:30:58,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255677389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:30:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431151984] [2022-11-23 15:30:58,823 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:30:58,824 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:30:58,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:30:58,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:30:58,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:30:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:58,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:58,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:58,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:58,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:58,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:58,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:59,537 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 15:30:59,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 15:30:59,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:59,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:59,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:59,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:59,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:59,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:59,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:59,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:30:59,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:00,637 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 15:31:00,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 15:31:00,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:00,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:00,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:31:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:01,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:01,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:01,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:01,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:01,323 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:31:01,324 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-23 15:31:03,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,149 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:31:03,149 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:31:03,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,187 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:03,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:03,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:03,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,246 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:03,247 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:03,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,324 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:03,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:03,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,376 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:03,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:03,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:03,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,440 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:03,440 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:03,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,500 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:03,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:03,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,535 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:03,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:03,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:03,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,591 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:03,591 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:03,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,675 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:03,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:03,729 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:31:03,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:31:03,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,817 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:31:03,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:31:03,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,911 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:03,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:03,947 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:31:03,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:31:03,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:03,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,034 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:31:04,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:31:04,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,102 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:04,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:04,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,143 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:04,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:04,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:04,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,202 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:04,202 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:04,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,277 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:04,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:04,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,332 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:04,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:04,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,390 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:04,390 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:04,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,451 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:04,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:04,488 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:31:04,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:31:04,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,589 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:31:04,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:31:04,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,683 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:04,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:04,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,713 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:04,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:04,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:04,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,766 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:04,766 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:04,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:04,845 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:04,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:04,879 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:31:05,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2885#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:31:05,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:31:05,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:31:05,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-23 15:31:05,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155800559] [2022-11-23 15:31:05,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:31:05,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 15:31:05,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 15:31:05,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 15:31:05,508 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:05,962 INFO L93 Difference]: Finished difference Result 179 states and 253 transitions. [2022-11-23 15:31:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 15:31:05,962 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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 72 [2022-11-23 15:31:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:05,964 INFO L225 Difference]: With dead ends: 179 [2022-11-23 15:31:05,964 INFO L226 Difference]: Without dead ends: 129 [2022-11-23 15:31:05,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 15:31:05,966 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:05,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:31:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-23 15:31:05,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-23 15:31:05,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0859375) internal successors, (139), 128 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2022-11-23 15:31:05,981 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 72 [2022-11-23 15:31:05,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:05,982 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2022-11-23 15:31:05,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:05,982 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2022-11-23 15:31:05,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 15:31:05,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:05,984 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:05,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:31:06,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:06,192 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:06,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1719339115, now seen corresponding path program 6 times [2022-11-23 15:31:06,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:06,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362410495] [2022-11-23 15:31:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:06,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 15:31:07,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:07,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362410495] [2022-11-23 15:31:07,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362410495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:07,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153806076] [2022-11-23 15:31:07,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:31:07,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:07,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:07,719 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:31:07,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:31:08,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:31:08,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:31:08,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 15:31:08,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:31:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 15:31:08,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:31:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 15:31:09,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153806076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:31:09,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562731157] [2022-11-23 15:31:09,084 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:31:09,084 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:31:09,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:31:09,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:31:09,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:31:09,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:09,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:09,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:09,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:09,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:09,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:09,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:09,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:09,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:09,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,207 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 15:31:10,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 15:31:10,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-23 15:31:10,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 15:31:10,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:10,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:10,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:10,893 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:31:10,894 INFO L350 Elim1Store]: Elim1 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 7 case distinctions, treesize of input 1040 treesize of output 1008 [2022-11-23 15:31:11,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,248 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:31:11,248 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:31:11,286 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:31:11,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:31:11,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,395 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:31:11,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:31:11,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,476 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:11,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:11,508 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:31:11,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:31:11,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,598 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:31:11,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:31:11,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,698 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:11,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:11,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,733 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:11,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:11,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:11,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,808 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:11,808 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:11,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,886 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:11,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:11,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,938 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:11,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:11,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:11,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:11,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,005 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:12,005 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:12,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,067 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:12,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:12,099 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:31:12,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:31:12,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,186 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:31:12,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:31:12,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,277 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:12,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:12,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,311 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:12,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:12,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:12,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,369 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:12,369 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:12,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,449 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:12,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:12,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,524 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:12,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:12,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,580 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:12,581 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:12,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,638 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:12,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:12,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,668 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:12,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:12,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:12,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,725 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:12,725 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:12,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,820 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:12,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:12,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,874 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:12,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:12,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:12,930 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:12,931 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:13,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:13,012 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:13,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:13,039 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:31:15,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4299#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:31:15,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:31:15,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:31:15,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-23 15:31:15,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193593048] [2022-11-23 15:31:15,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:31:15,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 15:31:15,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:15,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 15:31:15,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 15:31:15,862 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:16,026 INFO L93 Difference]: Finished difference Result 258 states and 302 transitions. [2022-11-23 15:31:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 15:31:16,026 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 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 127 [2022-11-23 15:31:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:16,027 INFO L225 Difference]: With dead ends: 258 [2022-11-23 15:31:16,027 INFO L226 Difference]: Without dead ends: 154 [2022-11-23 15:31:16,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 306 SyntacticMatches, 44 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3620 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 15:31:16,030 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:16,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:31:16,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-23 15:31:16,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-11-23 15:31:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0718954248366013) internal successors, (164), 153 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2022-11-23 15:31:16,044 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 127 [2022-11-23 15:31:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:16,045 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2022-11-23 15:31:16,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2022-11-23 15:31:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-23 15:31:16,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:16,047 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:16,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:31:16,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:16,259 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:16,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1421957727, now seen corresponding path program 7 times [2022-11-23 15:31:16,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:16,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744884148] [2022-11-23 15:31:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:16,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 15:31:19,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:19,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744884148] [2022-11-23 15:31:19,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744884148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:19,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200908788] [2022-11-23 15:31:19,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:31:19,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:19,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:19,595 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:31:19,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:31:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:20,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 15:31:20,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:31:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 15:31:20,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:31:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1671 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 15:31:23,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200908788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:31:23,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351413637] [2022-11-23 15:31:23,281 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:31:23,281 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:31:23,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:31:23,281 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:31:23,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:31:23,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:23,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:23,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:23,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:23,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:23,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:23,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:24,018 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 15:31:24,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 15:31:24,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:24,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:24,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:24,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:24,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:24,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:24,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:24,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:24,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:25,085 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 15:31:25,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 15:31:25,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:25,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:25,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:31:25,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:25,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:25,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:25,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:25,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:25,863 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:31:25,864 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-23 15:31:27,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:27,697 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:31:27,698 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:31:27,734 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:31:27,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:31:27,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:27,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:27,820 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:31:27,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:31:27,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:27,908 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:27,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:27,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:27,942 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:27,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:27,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:27,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:27,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:27,998 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:27,999 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:28,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,055 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:28,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:28,084 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:31:28,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:31:28,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,168 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:31:28,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:31:28,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,246 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:28,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:28,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,280 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:28,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:28,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:28,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,337 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:28,338 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:28,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,396 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:28,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:28,430 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:31:28,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:31:28,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,516 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:31:28,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:31:28,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,619 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:28,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:28,664 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:31:28,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:31:28,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,756 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:31:28,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:31:28,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,847 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:28,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:28,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,878 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:28,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:28,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:28,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:28,939 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:28,939 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:28,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:29,000 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:29,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:29,031 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:31:29,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:31:29,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:29,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:29,118 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:31:29,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:31:29,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:29,201 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:29,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:29,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:29,237 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:29,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:29,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:29,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:29,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:29,301 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:31:29,302 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:31:29,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:29,379 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:31:29,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:31:29,403 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:31:31,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6121#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:31:31,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:31:31,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:31:31,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-23 15:31:31,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494315096] [2022-11-23 15:31:31,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:31:31,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-23 15:31:31,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:31,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-23 15:31:31,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 15:31:31,076 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:31,372 INFO L93 Difference]: Finished difference Result 308 states and 377 transitions. [2022-11-23 15:31:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 15:31:31,373 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 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 152 [2022-11-23 15:31:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:31,374 INFO L225 Difference]: With dead ends: 308 [2022-11-23 15:31:31,374 INFO L226 Difference]: Without dead ends: 204 [2022-11-23 15:31:31,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 389 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 15:31:31,377 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:31,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:31:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-23 15:31:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-11-23 15:31:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 203 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 214 transitions. [2022-11-23 15:31:31,392 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 214 transitions. Word has length 152 [2022-11-23 15:31:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:31,393 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 214 transitions. [2022-11-23 15:31:31,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 100 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:31:31,393 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 214 transitions. [2022-11-23 15:31:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-23 15:31:31,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:31,397 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:31,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:31:31,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:31,605 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:31,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1648874721, now seen corresponding path program 8 times [2022-11-23 15:31:31,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:31,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053768107] [2022-11-23 15:31:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:31,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:31:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-23 15:31:40,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:31:40,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053768107] [2022-11-23 15:31:40,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053768107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:31:40,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203599373] [2022-11-23 15:31:40,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:31:40,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:40,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:31:40,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:31:40,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:32:11,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 15:32:11,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:32:11,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:32:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:32:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2022-11-23 15:32:12,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:32:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5346 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2022-11-23 15:32:13,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203599373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:32:13,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812172274] [2022-11-23 15:32:13,008 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:32:13,008 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:32:13,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:32:13,009 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:32:13,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:32:13,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:13,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:13,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:13,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:13,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:13,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:13,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:13,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:13,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,061 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 15:32:14,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 15:32:14,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 76 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 67 [2022-11-23 15:32:14,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 15:32:14,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:14,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:14,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:14,693 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:32:14,694 INFO L350 Elim1Store]: Elim1 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 7 case distinctions, treesize of input 1040 treesize of output 1008 [2022-11-23 15:32:15,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,017 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:32:15,018 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:32:15,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,057 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:15,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:15,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,124 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:32:15,125 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:32:15,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,240 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:15,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:15,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,296 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:15,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:15,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:15,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,351 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:32:15,352 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:32:15,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,407 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:15,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:15,441 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:32:15,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:32:15,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,540 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:32:15,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:32:15,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,621 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:15,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:15,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,651 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:15,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:15,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,710 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:32:15,710 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:32:15,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,765 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:15,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:15,794 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:32:15,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:32:15,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,883 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:32:15,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:32:15,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:15,971 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:15,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:15,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,011 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:16,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:16,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:16,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,080 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:32:16,081 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:32:16,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,159 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:16,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:16,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,224 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:16,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:16,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:16,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,290 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:32:16,290 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:32:16,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,352 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:16,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:16,386 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:32:16,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:32:16,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,485 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:32:16,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:32:16,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,554 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:16,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:16,586 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:32:16,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:32:16,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,688 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:32:16,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:32:16,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:16,799 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:16,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:16,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:32:17,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8465#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:32:17,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:32:17,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:32:17,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-23 15:32:17,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296273699] [2022-11-23 15:32:17,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:32:17,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-23 15:32:17,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:17,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-23 15:32:17,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 15:32:17,951 INFO L87 Difference]: Start difference. First operand 204 states and 214 transitions. Second operand has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:18,753 INFO L93 Difference]: Finished difference Result 417 states and 545 transitions. [2022-11-23 15:32:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-23 15:32:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 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 202 [2022-11-23 15:32:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:18,756 INFO L225 Difference]: With dead ends: 417 [2022-11-23 15:32:18,756 INFO L226 Difference]: Without dead ends: 313 [2022-11-23 15:32:18,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 15:32:18,761 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:18,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:32:18,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-23 15:32:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-11-23 15:32:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.0352564102564104) internal successors, (323), 312 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 323 transitions. [2022-11-23 15:32:18,778 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 323 transitions. Word has length 202 [2022-11-23 15:32:18,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:18,778 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 323 transitions. [2022-11-23 15:32:18,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 323 transitions. [2022-11-23 15:32:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-23 15:32:18,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:18,785 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:32:18,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:32:18,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:32:18,999 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:32:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:19,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1588214187, now seen corresponding path program 9 times [2022-11-23 15:32:19,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:19,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777635356] [2022-11-23 15:32:19,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:19,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:32:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:32:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 15:32:28,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:32:28,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777635356] [2022-11-23 15:32:28,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777635356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:32:28,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678710502] [2022-11-23 15:32:28,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:32:28,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:32:28,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:32:28,677 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:32:28,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:32:29,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:32:29,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:32:29,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 3326 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-23 15:32:29,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:32:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 15:32:29,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:32:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 15:32:42,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678710502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:32:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980264382] [2022-11-23 15:32:42,005 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:32:42,005 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:32:42,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:32:42,006 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:32:42,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:32:42,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,701 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 15:32:42,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 15:32:42,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:42,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:43,806 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 15:32:43,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 15:32:43,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:43,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:43,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 15:32:44,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:44,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:44,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:44,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:44,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:44,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:44,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:44,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:44,395 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:32:44,396 INFO L350 Elim1Store]: Elim1 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 7 case distinctions, treesize of input 1040 treesize of output 1008 [2022-11-23 15:32:44,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:44,720 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:32:44,721 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:32:44,758 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:32:44,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:32:44,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:44,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:44,845 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:32:44,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:32:44,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:44,917 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:44,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:44,952 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:32:44,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:32:44,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:44,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,053 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:32:45,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:32:45,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,193 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:45,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:45,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,228 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:45,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:45,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:45,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,281 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:32:45,281 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:32:45,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,358 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:45,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:45,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,414 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:45,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:45,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:45,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,467 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:32:45,468 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:32:45,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,524 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:45,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:45,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,559 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:45,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:45,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:45,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,617 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:32:45,618 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:32:45,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,675 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:45,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:45,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,705 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:45,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:45,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,770 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:32:45,770 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:32:45,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,841 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:45,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:45,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,901 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:45,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:45,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:45,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:45,954 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:32:45,955 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:32:46,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:46,012 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:46,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:46,045 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:32:46,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:32:46,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:46,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:46,144 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:32:46,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:32:46,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:46,270 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:46,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:46,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:46,304 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:46,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:46,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:32:46,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:46,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:46,361 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:32:46,361 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:32:46,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:32:46,438 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:32:46,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:32:46,463 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:32:58,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11979#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:32:58,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:32:58,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:32:58,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-23 15:32:58,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122126220] [2022-11-23 15:32:58,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:32:58,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-23 15:32:58,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:32:58,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-23 15:32:58,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 15:32:58,902 INFO L87 Difference]: Start difference. First operand 313 states and 323 transitions. Second operand has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:59,517 INFO L93 Difference]: Finished difference Result 626 states and 746 transitions. [2022-11-23 15:32:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-23 15:32:59,518 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 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 311 [2022-11-23 15:32:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:59,519 INFO L225 Difference]: With dead ends: 626 [2022-11-23 15:32:59,520 INFO L226 Difference]: Without dead ends: 414 [2022-11-23 15:32:59,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 757 SyntacticMatches, 69 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22596 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 15:32:59,524 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:59,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:32:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-23 15:32:59,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2022-11-23 15:32:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.026634382566586) internal successors, (424), 413 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:59,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 424 transitions. [2022-11-23 15:32:59,543 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 424 transitions. Word has length 311 [2022-11-23 15:32:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:59,543 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 424 transitions. [2022-11-23 15:32:59,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:59,544 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 424 transitions. [2022-11-23 15:32:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-11-23 15:32:59,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:32:59,553 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:32:59,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:32:59,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:32:59,764 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:32:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:32:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2072495007, now seen corresponding path program 10 times [2022-11-23 15:32:59,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:32:59,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400244816] [2022-11-23 15:32:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:32:59,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 15:33:32,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:32,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400244816] [2022-11-23 15:33:32,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400244816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:32,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218271948] [2022-11-23 15:33:32,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:33:32,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:32,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:32,841 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:32,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:33:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 5043 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-23 15:33:34,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 15:33:34,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:34:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 22377 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 15:34:23,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218271948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:34:23,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1165923723] [2022-11-23 15:34:23,312 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:34:23,313 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:34:23,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:34:23,313 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:34:23,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:23,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:23,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:23,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:23,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:23,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:23,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:23,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:23,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:23,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,027 INFO L321 Elim1Store]: treesize reduction 1189, result has 6.5 percent of original size [2022-11-23 15:34:24,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 21 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2022-11-23 15:34:24,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:24,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,097 INFO L321 Elim1Store]: treesize reduction 1620, result has 5.3 percent of original size [2022-11-23 15:34:25,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 13 select indices, 13 select index equivalence classes, 23 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 74 case distinctions, treesize of input 279 treesize of output 325 [2022-11-23 15:34:25,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 24 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:34:25,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:25,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:25,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:25,789 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:34:25,790 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 9 case distinctions, treesize of input 1020 treesize of output 1010 [2022-11-23 15:34:27,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:27,549 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:34:27,550 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:34:27,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:27,585 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:27,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:27,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:27,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:27,645 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:34:27,645 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:34:27,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:27,722 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:27,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:27,774 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:34:27,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:34:27,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:27,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:27,881 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:34:27,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:34:27,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:27,968 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:27,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:27,999 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:34:28,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:34:28,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,098 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:34:28,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:34:28,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,166 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:28,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:28,199 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:34:28,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:34:28,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,286 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:34:28,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 137 [2022-11-23 15:34:28,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,365 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:28,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:28,398 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:34:28,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:34:28,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,484 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:34:28,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:34:28,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,555 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:28,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:28,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,588 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:28,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:28,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:28,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,705 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:34:28,706 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:34:28,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,807 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:28,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:28,859 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:34:28,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:34:28,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:28,962 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:34:28,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 147 [2022-11-23 15:34:29,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:29,044 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:29,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:29,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:29,079 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:29,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:29,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:29,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:29,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:29,134 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:34:29,134 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:34:29,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:29,209 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:29,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:29,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:29,262 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:29,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:29,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:29,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:29,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:29,319 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:34:29,320 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 128 treesize of output 133 [2022-11-23 15:34:29,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:29,396 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:29,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:29,422 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:31,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16921#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a0~0#1.base|) (+ |ULTIMATE.start_main_~#a0~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_~#a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem24#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a0~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:34:31,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:34:31,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:34:31,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-23 15:34:31,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664620349] [2022-11-23 15:34:31,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:31,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-23 15:34:31,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-23 15:34:31,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 15:34:31,124 INFO L87 Difference]: Start difference. First operand 414 states and 424 transitions. Second operand has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:34:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:33,726 INFO L93 Difference]: Finished difference Result 828 states and 1049 transitions. [2022-11-23 15:34:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-23 15:34:33,728 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 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 412 [2022-11-23 15:34:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:33,729 INFO L225 Difference]: With dead ends: 828 [2022-11-23 15:34:33,729 INFO L226 Difference]: Without dead ends: 616 [2022-11-23 15:34:33,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1436 GetRequests, 1028 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 65.6s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 15:34:33,736 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:33,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:34:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-23 15:34:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-11-23 15:34:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.0178861788617886) internal successors, (626), 615 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:34:33,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 626 transitions. [2022-11-23 15:34:33,762 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 626 transitions. Word has length 412 [2022-11-23 15:34:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:33,763 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 626 transitions. [2022-11-23 15:34:33,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 404 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:34:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 626 transitions. [2022-11-23 15:34:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2022-11-23 15:34:33,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:33,769 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:33,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:33,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:33,984 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:34:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:33,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1846670687, now seen corresponding path program 11 times [2022-11-23 15:34:33,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:33,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429900676] [2022-11-23 15:34:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:33,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 83280 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2022-11-23 15:36:49,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:49,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429900676] [2022-11-23 15:36:49,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429900676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:49,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178391990] [2022-11-23 15:36:49,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:36:49,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:49,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:49,843 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:49,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f1dedac-6baa-461e-b644-86ff4a9f5279/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process