./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_reverse_ground.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_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/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_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/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_85e5fecf-11c4-4f68-ab48-f9816565a257/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 cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 --- 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 15:25:57,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:25:57,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:25:57,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:25:57,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:25:57,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:25:57,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:25:57,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:25:57,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:25:57,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:25:57,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:25:57,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:25:57,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:25:57,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:25:57,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:25:57,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:25:57,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:25:57,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:25:57,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:25:57,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:25:57,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:25:57,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:25:57,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:25:57,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:25:57,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:25:57,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:25:57,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:25:57,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:25:57,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:25:57,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:25:57,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:25:57,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:25:57,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:25:57,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:25:57,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:25:57,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:25:57,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:25:57,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:25:57,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:25:57,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:25:57,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:25:57,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:25:57,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:25:57,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:25:57,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:25:57,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:25:57,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:25:57,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:25:57,565 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:25:57,565 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:25:57,566 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:25:57,566 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:25:57,567 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:25:57,568 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:25:57,568 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:25:57,568 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:25:57,568 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:25:57,569 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:25:57,569 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:25:57,569 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:25:57,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:25:57,570 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:25:57,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:25:57,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:25:57,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:25:57,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:25:57,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:25:57,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:25:57,572 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:25:57,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:25:57,572 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:25:57,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:25:57,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:25:57,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:25:57,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:25:57,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:25:57,574 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:25:57,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:25:57,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:25:57,575 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:25:57,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:25:57,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:25:57,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:25:57,575 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_85e5fecf-11c4-4f68-ab48-f9816565a257/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 [2022-11-23 15:25:57,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:25:57,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:25:57,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:25:57,929 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:25:57,930 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:25:57,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_reverse_ground.i [2022-11-23 15:26:01,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:26:01,380 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:26:01,380 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2022-11-23 15:26:01,388 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/data/cf6d1f41d/0c66ef32d00c44a0ba318ddf310477bc/FLAG482a654e8 [2022-11-23 15:26:01,729 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/data/cf6d1f41d/0c66ef32d00c44a0ba318ddf310477bc [2022-11-23 15:26:01,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:26:01,739 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:26:01,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:26:01,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:26:01,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:26:01,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:26:01" (1/1) ... [2022-11-23 15:26:01,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d17f0d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:01, skipping insertion in model container [2022-11-23 15:26:01,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:26:01" (1/1) ... [2022-11-23 15:26:01,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:26:01,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:26:01,953 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_85e5fecf-11c4-4f68-ab48-f9816565a257/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2022-11-23 15:26:01,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:26:01,975 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:26:01,988 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_85e5fecf-11c4-4f68-ab48-f9816565a257/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2022-11-23 15:26:01,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:26:02,009 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:26:02,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02 WrapperNode [2022-11-23 15:26:02,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:26:02,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:26:02,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:26:02,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:26:02,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (1/1) ... [2022-11-23 15:26:02,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (1/1) ... [2022-11-23 15:26:02,045 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2022-11-23 15:26:02,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:26:02,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:26:02,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:26:02,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:26:02,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (1/1) ... [2022-11-23 15:26:02,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (1/1) ... [2022-11-23 15:26:02,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (1/1) ... [2022-11-23 15:26:02,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (1/1) ... [2022-11-23 15:26:02,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (1/1) ... [2022-11-23 15:26:02,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (1/1) ... [2022-11-23 15:26:02,068 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (1/1) ... [2022-11-23 15:26:02,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (1/1) ... [2022-11-23 15:26:02,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:26:02,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:26:02,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:26:02,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:26:02,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (1/1) ... [2022-11-23 15:26:02,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:26:02,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:02,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:26:02,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:26:02,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:26:02,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:26:02,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:26:02,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:26:02,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:26:02,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:26:02,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:26:02,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:26:02,227 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:26:02,232 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:26:02,366 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:26:02,415 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:26:02,430 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 15:26:02,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:26:02 BoogieIcfgContainer [2022-11-23 15:26:02,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:26:02,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:26:02,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:26:02,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:26:02,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:26:01" (1/3) ... [2022-11-23 15:26:02,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2a6976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:26:02, skipping insertion in model container [2022-11-23 15:26:02,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:02" (2/3) ... [2022-11-23 15:26:02,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2a6976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:26:02, skipping insertion in model container [2022-11-23 15:26:02,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:26:02" (3/3) ... [2022-11-23 15:26:02,447 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2022-11-23 15:26:02,471 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:26:02,472 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:26:02,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:26:02,531 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;@150c94cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:26:02,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:26:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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 15:26:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:26:02,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:02,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:26:02,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1598963128, now seen corresponding path program 1 times [2022-11-23 15:26:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:02,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586979944] [2022-11-23 15:26:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:02,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:02,870 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 15:26:02,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:02,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586979944] [2022-11-23 15:26:02,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586979944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:02,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:26:02,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:26:02,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687136430] [2022-11-23 15:26:02,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:02,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:26:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:02,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:26:02,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:26:02,935 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 15:26:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:02,989 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-23 15:26:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:26:03,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-11-23 15:26:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:03,031 INFO L225 Difference]: With dead ends: 18 [2022-11-23 15:26:03,032 INFO L226 Difference]: Without dead ends: 10 [2022-11-23 15:26:03,034 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 15:26:03,040 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:03,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:26:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-23 15:26:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-23 15:26:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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 15:26:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-23 15:26:03,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-23 15:26:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:03,087 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-23 15:26:03,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 15:26:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-23 15:26:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:26:03,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:03,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:03,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:26:03,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:03,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:03,092 INFO L85 PathProgramCache]: Analyzing trace with hash 757882845, now seen corresponding path program 1 times [2022-11-23 15:26:03,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:03,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258908814] [2022-11-23 15:26:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:03,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:26:03,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:03,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258908814] [2022-11-23 15:26:03,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258908814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:03,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851329238] [2022-11-23 15:26:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:03,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:03,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:03,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:03,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:26:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:03,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:26:03,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:26:03,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:26:03,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851329238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:03,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424678459] [2022-11-23 15:26:03,563 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:26:03,564 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:03,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:03,575 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:03,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:03,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:03,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:03,729 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:26:03,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 15:26:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:03,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:03,857 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:26:03,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:26:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:03,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 15:26:04,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:04,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:04,156 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:26:04,157 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 4 case distinctions, treesize of input 242 treesize of output 241 [2022-11-23 15:26:04,403 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:26:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:04,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:26:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:04,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:04,524 INFO L321 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2022-11-23 15:26:04,525 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 5 case distinctions, treesize of input 72 treesize of output 83 [2022-11-23 15:26:04,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:04,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:26:04,599 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:04,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:26:04,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:26:04,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:26:04,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 15:26:04,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167011589] [2022-11-23 15:26:04,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:26:04,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:26:04,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:04,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:26:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:26:04,747 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:04,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:04,789 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-11-23 15:26:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:26:04,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 15:26:04,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:04,790 INFO L225 Difference]: With dead ends: 23 [2022-11-23 15:26:04,790 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 15:26:04,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:26:04,792 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:04,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:26:04,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 15:26:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 15:26:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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 15:26:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-23 15:26:04,797 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-23 15:26:04,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:04,798 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-23 15:26:04,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-23 15:26:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 15:26:04,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:04,799 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:04,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:05,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:05,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:05,007 INFO L85 PathProgramCache]: Analyzing trace with hash 910138760, now seen corresponding path program 2 times [2022-11-23 15:26:05,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:05,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494964976] [2022-11-23 15:26:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:05,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:26:05,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494964976] [2022-11-23 15:26:05,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494964976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004037089] [2022-11-23 15:26:05,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:26:05,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:05,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:05,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:05,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:26:05,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:26:05,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:26:05,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 15:26:05,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:05,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 15:26:05,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 15:26:05,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:05,570 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 15:26:05,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 23 [2022-11-23 15:26:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:26:05,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:26:05,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004037089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:05,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:26:05,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-23 15:26:05,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899996031] [2022-11-23 15:26:05,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:05,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:26:05,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:05,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:26:05,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:26:05,592 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:05,781 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-11-23 15:26:05,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:26:05,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 15:26:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:05,783 INFO L225 Difference]: With dead ends: 22 [2022-11-23 15:26:05,783 INFO L226 Difference]: Without dead ends: 20 [2022-11-23 15:26:05,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:26:05,793 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:05,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 6 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:26:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-23 15:26:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-23 15:26:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-11-23 15:26:05,809 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2022-11-23 15:26:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:05,809 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-11-23 15:26:05,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-11-23 15:26:05,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 15:26:05,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:05,812 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:05,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:06,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:06,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash -179519022, now seen corresponding path program 1 times [2022-11-23 15:26:06,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:06,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531832789] [2022-11-23 15:26:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:06,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:26:06,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:06,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531832789] [2022-11-23 15:26:06,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531832789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:06,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084476535] [2022-11-23 15:26:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:06,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:06,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:06,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:06,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:26:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:26:06,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:26:06,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:26:06,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084476535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:06,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1129570949] [2022-11-23 15:26:06,339 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:26:06,339 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:06,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:06,340 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:06,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:06,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:06,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:06,394 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:26:06,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 15:26:06,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:06,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:06,454 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:26:06,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:26:06,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:06,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:26:06,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:06,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:06,568 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:26:06,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 252 treesize of output 240 [2022-11-23 15:26:06,623 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:26:06,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:06,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:26:06,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:06,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:06,701 INFO L321 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2022-11-23 15:26:06,702 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 5 case distinctions, treesize of input 72 treesize of output 83 [2022-11-23 15:26:06,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:06,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:26:06,841 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:07,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '402#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:26:07,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:26:07,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:26:07,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 15:26:07,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455887480] [2022-11-23 15:26:07,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:26:07,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:26:07,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:26:07,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:26:07,327 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:07,406 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-11-23 15:26:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:26:07,407 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 15:26:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:07,408 INFO L225 Difference]: With dead ends: 42 [2022-11-23 15:26:07,408 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 15:26:07,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:26:07,413 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:07,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:26:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 15:26:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-23 15:26:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-11-23 15:26:07,431 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-11-23 15:26:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:07,431 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-11-23 15:26:07,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-11-23 15:26:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 15:26:07,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:07,433 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:07,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:07,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:07,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:07,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:07,646 INFO L85 PathProgramCache]: Analyzing trace with hash -830818062, now seen corresponding path program 2 times [2022-11-23 15:26:07,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:07,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069715536] [2022-11-23 15:26:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:07,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-23 15:26:08,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:08,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069715536] [2022-11-23 15:26:08,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069715536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:08,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072974177] [2022-11-23 15:26:08,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:26:08,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:08,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:08,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:08,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:26:08,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:26:08,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:26:08,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 15:26:08,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:08,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 15:26:08,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:26:08,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 39 [2022-11-23 15:26:08,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:08,492 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 15:26:08,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 23 [2022-11-23 15:26:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-23 15:26:08,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:08,697 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:26:08,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 492 treesize of output 456 [2022-11-23 15:26:08,723 INFO L321 Elim1Store]: treesize reduction 31, result has 11.4 percent of original size [2022-11-23 15:26:08,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 738 treesize of output 594 [2022-11-23 15:26:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-23 15:26:09,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072974177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:09,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1031546170] [2022-11-23 15:26:09,894 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:26:09,894 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:09,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:09,895 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:09,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:09,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:09,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:09,955 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:26:09,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:26:09,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:09,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:09,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 15:26:09,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:09,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 15:26:10,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:10,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:10,096 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:26:10,097 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 4 case distinctions, treesize of input 242 treesize of output 241 [2022-11-23 15:26:10,190 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:26:10,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:10,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:26:10,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:10,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:10,253 INFO L321 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-11-23 15:26:10,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-23 15:26:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:10,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:26:10,364 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:10,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '727#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:26:10,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:26:10,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:26:10,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 24 [2022-11-23 15:26:10,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610116971] [2022-11-23 15:26:10,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:26:10,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 15:26:10,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:10,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 15:26:10,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:26:10,897 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:12,198 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-11-23 15:26:12,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 15:26:12,198 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-23 15:26:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:12,199 INFO L225 Difference]: With dead ends: 58 [2022-11-23 15:26:12,199 INFO L226 Difference]: Without dead ends: 40 [2022-11-23 15:26:12,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2022-11-23 15:26:12,202 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:12,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 16 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:26:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-23 15:26:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2022-11-23 15:26:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-23 15:26:12,215 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2022-11-23 15:26:12,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:12,215 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-23 15:26:12,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-23 15:26:12,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 15:26:12,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:12,217 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 15:26:12,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:12,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:12,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash 10578365, now seen corresponding path program 3 times [2022-11-23 15:26:12,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:12,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180326510] [2022-11-23 15:26:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 15:26:12,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180326510] [2022-11-23 15:26:12,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180326510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890864440] [2022-11-23 15:26:12,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:26:12,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:12,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:12,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:12,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:26:12,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:26:12,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:26:12,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:26:12,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 15:26:12,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 15:26:13,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890864440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:13,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1480796879] [2022-11-23 15:26:13,147 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:26:13,147 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:13,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:13,148 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:13,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:13,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:13,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:13,193 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:26:13,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 15:26:13,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:13,245 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:26:13,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:26:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:13,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:26:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:13,342 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:26:13,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 252 treesize of output 240 [2022-11-23 15:26:13,389 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:26:13,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:13,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:26:13,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:13,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:13,447 INFO L321 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-11-23 15:26:13,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-23 15:26:13,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:13,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:26:13,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:13,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1181#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:26:13,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:26:13,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:26:13,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-11-23 15:26:13,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928300529] [2022-11-23 15:26:13,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:26:13,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 15:26:13,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:13,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 15:26:13,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2022-11-23 15:26:13,981 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 15:26:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:14,140 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2022-11-23 15:26:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 15:26:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 34 [2022-11-23 15:26:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:14,141 INFO L225 Difference]: With dead ends: 83 [2022-11-23 15:26:14,141 INFO L226 Difference]: Without dead ends: 61 [2022-11-23 15:26:14,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2022-11-23 15:26:14,143 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:14,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:26:14,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-23 15:26:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-23 15:26:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-11-23 15:26:14,166 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 34 [2022-11-23 15:26:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:14,166 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-11-23 15:26:14,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 15:26:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-11-23 15:26:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 15:26:14,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:14,168 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 15:26:14,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:14,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:14,374 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:14,374 INFO L85 PathProgramCache]: Analyzing trace with hash 654932360, now seen corresponding path program 4 times [2022-11-23 15:26:14,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:14,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972008685] [2022-11-23 15:26:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:14,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-23 15:26:15,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:15,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972008685] [2022-11-23 15:26:15,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972008685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:15,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718438467] [2022-11-23 15:26:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:26:15,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:15,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:15,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:26:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:15,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 15:26:15,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-23 15:26:15,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-23 15:26:16,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718438467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:16,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112334573] [2022-11-23 15:26:16,473 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:26:16,473 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:16,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:16,474 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:16,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:16,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:16,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:16,547 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:26:16,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:26:16,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:16,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:16,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 15:26:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:16,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 15:26:16,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:16,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:16,669 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 15:26:16,670 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 4 case distinctions, treesize of input 242 treesize of output 241 [2022-11-23 15:26:16,768 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:26:16,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:16,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:26:16,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:16,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:16,823 INFO L321 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-11-23 15:26:16,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-23 15:26:16,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:16,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:26:16,932 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:17,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1858#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:26:17,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:26:17,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:26:17,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2022-11-23 15:26:17,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257803902] [2022-11-23 15:26:17,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:26:17,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-23 15:26:17,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:17,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-23 15:26:17,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1397, Invalid=1909, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 15:26:17,428 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 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 15:26:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:17,902 INFO L93 Difference]: Finished difference Result 148 states and 203 transitions. [2022-11-23 15:26:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-23 15:26:17,903 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 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 15:26:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:17,908 INFO L225 Difference]: With dead ends: 148 [2022-11-23 15:26:17,909 INFO L226 Difference]: Without dead ends: 113 [2022-11-23 15:26:17,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1397, Invalid=1909, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 15:26:17,912 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:17,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:26:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-23 15:26:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-11-23 15:26:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 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 15:26:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-11-23 15:26:17,985 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 60 [2022-11-23 15:26:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:17,986 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-11-23 15:26:17,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 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 15:26:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-11-23 15:26:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 15:26:17,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:17,997 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 15:26:18,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:18,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:18,198 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:18,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:18,198 INFO L85 PathProgramCache]: Analyzing trace with hash 246965928, now seen corresponding path program 5 times [2022-11-23 15:26:18,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:18,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056274858] [2022-11-23 15:26:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:18,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1282 trivial. 0 not checked. [2022-11-23 15:26:21,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:21,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056274858] [2022-11-23 15:26:21,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056274858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:21,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327505551] [2022-11-23 15:26:21,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:26:21,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:21,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:21,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:21,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:26:21,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 15:26:21,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:26:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 15:26:21,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:21,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 15:26:22,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:26:22,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 15:26:22,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 39 [2022-11-23 15:26:22,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:22,788 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 15:26:22,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 23 [2022-11-23 15:26:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 144 proven. 10 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2022-11-23 15:26:22,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:23,511 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:26:23,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1104 treesize of output 1036 [2022-11-23 15:26:23,541 INFO L321 Elim1Store]: treesize reduction 31, result has 11.4 percent of original size [2022-11-23 15:26:23,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4858 treesize of output 4214 [2022-11-23 15:34:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 2403 trivial. 0 not checked. [2022-11-23 15:34:25,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327505551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:34:25,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663892266] [2022-11-23 15:34:25,302 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:34:25,303 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:34:25,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:34:25,303 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:34:25,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:25,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,364 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:34:25,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 15:34:25,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,425 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:34:25,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:34:25,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:34:25,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,551 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:34:25,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 252 treesize of output 240 [2022-11-23 15:34:25,615 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:34:25,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:34:25,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,722 INFO L321 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2022-11-23 15:34:25,722 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 5 case distinctions, treesize of input 72 treesize of output 83 [2022-11-23 15:34:25,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:25,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:25,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:26,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3099#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:34:26,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:34:26,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:34:26,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 10, 10] total 70 [2022-11-23 15:34:26,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281692549] [2022-11-23 15:34:26,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:26,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-23 15:34:26,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:26,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-23 15:34:26,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1637, Invalid=4063, Unknown=0, NotChecked=0, Total=5700 [2022-11-23 15:34:26,768 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 71 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 states have internal predecessors, (91), 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 15:34:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:45,032 INFO L93 Difference]: Finished difference Result 186 states and 195 transitions. [2022-11-23 15:34:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-23 15:34:45,033 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 states have internal predecessors, (91), 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 112 [2022-11-23 15:34:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:45,034 INFO L225 Difference]: With dead ends: 186 [2022-11-23 15:34:45,034 INFO L226 Difference]: Without dead ends: 125 [2022-11-23 15:34:45,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8077 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=9580, Invalid=26328, Unknown=2, NotChecked=0, Total=35910 [2022-11-23 15:34:45,045 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 104 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 342 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:45,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 26 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 267 Invalid, 1 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 15:34:45,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-23 15:34:45,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2022-11-23 15:34:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 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 15:34:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2022-11-23 15:34:45,081 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 112 [2022-11-23 15:34:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:45,082 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2022-11-23 15:34:45,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 states have internal predecessors, (91), 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 15:34:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2022-11-23 15:34:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 15:34:45,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:45,084 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 15:34:45,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:45,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:34:45,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:34:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1611831811, now seen corresponding path program 6 times [2022-11-23 15:34:45,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:45,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495175173] [2022-11-23 15:34:45,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:45,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 1341 trivial. 0 not checked. [2022-11-23 15:34:48,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:48,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495175173] [2022-11-23 15:34:48,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495175173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:48,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947285146] [2022-11-23 15:34:48,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:34:48,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:48,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:34:48,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:34:48,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:34:48,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:34:48,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:34:48,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 15:34:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 1341 trivial. 0 not checked. [2022-11-23 15:34:49,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:34:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 1341 trivial. 0 not checked. [2022-11-23 15:34:53,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947285146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:34:53,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [767325133] [2022-11-23 15:34:53,187 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:34:53,187 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:34:53,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:34:53,188 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:34:53,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:53,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,245 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:34:53,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:34:53,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 15:34:53,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:34:53,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,366 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:34:53,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 252 treesize of output 240 [2022-11-23 15:34:53,417 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:34:53,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:34:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,499 INFO L321 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2022-11-23 15:34:53,500 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 5 case distinctions, treesize of input 72 treesize of output 83 [2022-11-23 15:34:53,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:53,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:53,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:54,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4715#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:34:54,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:34:54,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:34:54,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 106 [2022-11-23 15:34:54,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536639499] [2022-11-23 15:34:54,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:54,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-23 15:34:54,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-23 15:34:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5690, Invalid=6742, Unknown=0, NotChecked=0, Total=12432 [2022-11-23 15:34:54,293 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 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 15:34:55,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:55,734 INFO L93 Difference]: Finished difference Result 289 states and 398 transitions. [2022-11-23 15:34:55,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-23 15:34:55,734 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 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 117 [2022-11-23 15:34:55,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:55,736 INFO L225 Difference]: With dead ends: 289 [2022-11-23 15:34:55,736 INFO L226 Difference]: Without dead ends: 224 [2022-11-23 15:34:55,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5690, Invalid=6742, Unknown=0, NotChecked=0, Total=12432 [2022-11-23 15:34:55,739 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:55,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:34:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-23 15:34:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-11-23 15:34:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0134529147982063) internal successors, (226), 223 states have internal predecessors, (226), 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 15:34:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2022-11-23 15:34:55,808 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 117 [2022-11-23 15:34:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:55,809 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2022-11-23 15:34:55,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 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 15:34:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2022-11-23 15:34:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-23 15:34:55,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:55,812 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 15:34:55,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:56,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 15:34:56,016 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:34:56,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1434658002, now seen corresponding path program 7 times [2022-11-23 15:34:56,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:56,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740540771] [2022-11-23 15:34:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:56,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10935 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 5475 trivial. 0 not checked. [2022-11-23 15:35:06,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:06,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740540771] [2022-11-23 15:35:06,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740540771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:35:06,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007414089] [2022-11-23 15:35:06,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:35:06,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:35:06,661 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:35:06,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:35:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:07,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-23 15:35:07,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:35:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10935 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 5475 trivial. 0 not checked. [2022-11-23 15:35:07,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:35:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10935 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 5475 trivial. 0 not checked. [2022-11-23 15:35:23,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007414089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:35:23,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554650532] [2022-11-23 15:35:23,512 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:35:23,512 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:35:23,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:35:23,513 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:35:23,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:35:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:23,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:23,575 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:35:23,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 15:35:23,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:23,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:23,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 15:35:23,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:23,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 15:35:23,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:23,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:23,701 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 15:35:23,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 252 treesize of output 240 [2022-11-23 15:35:23,810 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:35:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:23,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:35:23,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:23,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:23,882 INFO L321 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2022-11-23 15:35:23,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 85 [2022-11-23 15:35:23,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:35:23,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:35:24,129 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:35:25,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7262#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (or (and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 399996 (* |ULTIMATE.start_main_~x~0#1| (- 4))))) (< |ULTIMATE.start_main_~x~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|))' at error location [2022-11-23 15:35:25,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:35:25,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:35:25,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 212 [2022-11-23 15:35:25,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147878995] [2022-11-23 15:35:25,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:35:25,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-11-23 15:35:25,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:35:25,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-11-23 15:35:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22598, Invalid=24708, Unknown=0, NotChecked=0, Total=47306 [2022-11-23 15:35:25,203 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand has 213 states, 213 states have (on average 1.0375586854460095) internal successors, (221), 212 states have internal predecessors, (221), 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 15:35:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:35:35,514 INFO L93 Difference]: Finished difference Result 554 states and 769 transitions. [2022-11-23 15:35:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-11-23 15:35:35,523 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.0375586854460095) internal successors, (221), 212 states have internal predecessors, (221), 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 223 [2022-11-23 15:35:35,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:35:35,529 INFO L225 Difference]: With dead ends: 554 [2022-11-23 15:35:35,529 INFO L226 Difference]: Without dead ends: 436 [2022-11-23 15:35:35,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1991 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=22598, Invalid=24708, Unknown=0, NotChecked=0, Total=47306 [2022-11-23 15:35:35,536 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 1236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1236 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:35:35,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1236 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 15:35:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-23 15:35:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-11-23 15:35:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.006896551724138) internal successors, (438), 435 states have internal predecessors, (438), 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 15:35:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 438 transitions. [2022-11-23 15:35:35,720 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 438 transitions. Word has length 223 [2022-11-23 15:35:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:35:35,720 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 438 transitions. [2022-11-23 15:35:35,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.0375586854460095) internal successors, (221), 212 states have internal predecessors, (221), 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 15:35:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 438 transitions. [2022-11-23 15:35:35,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-11-23 15:35:35,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:35:35,729 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 15:35:35,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:35:35,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:35,939 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:35:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:35:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1423041202, now seen corresponding path program 8 times [2022-11-23 15:35:35,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:35:35,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553739955] [2022-11-23 15:35:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:35:35,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:35:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 44325 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 22170 trivial. 0 not checked. [2022-11-23 15:36:15,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:15,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553739955] [2022-11-23 15:36:15,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553739955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:15,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982576505] [2022-11-23 15:36:15,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:36:15,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:15,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:15,983 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:15,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85e5fecf-11c4-4f68-ab48-f9816565a257/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:36:16,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 15:36:16,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:36:16,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-23 15:36:16,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:16,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 15:36:18,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:36:18,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 15:36:19,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 15:36:19,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 39 [2022-11-23 15:36:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:20,913 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 15:36:20,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 23 [2022-11-23 15:36:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 44325 backedges. 828 proven. 21 refuted. 0 times theorem prover too weak. 43476 trivial. 0 not checked. [2022-11-23 15:36:21,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:36:23,718 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:36:23,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9946 treesize of output 9406 [2022-11-23 15:36:23,817 INFO L321 Elim1Store]: treesize reduction 31, result has 11.4 percent of original size [2022-11-23 15:36:23,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 528194 treesize of output 484934 [2022-11-23 15:36:51,855 WARN L233 SmtUtils]: Spent 28.03s on a formula simplification. DAG size of input: 781 DAG size of output: 685 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-23 15:37:02,668 WARN L233 SmtUtils]: Spent 10.80s on a formula simplification. DAG size of input: 597 DAG size of output: 544 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-23 15:37:11,919 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 541 DAG size of output: 541 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-23 15:37:18,511 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 541 DAG size of output: 541 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)