./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS --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 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 --- 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-8393723 [2022-11-19 07:54:08,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:54:08,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:54:08,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:54:08,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:54:08,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:54:08,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:54:08,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:54:08,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:54:08,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:54:08,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:54:08,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:54:08,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:54:08,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:54:08,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:54:08,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:54:08,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:54:08,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:54:08,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:54:08,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:54:08,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:54:08,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:54:08,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:54:08,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:54:08,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:54:08,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:54:08,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:54:08,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:54:08,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:54:08,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:54:08,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:54:08,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:54:08,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:54:08,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:54:08,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:54:08,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:54:08,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:54:08,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:54:08,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:54:08,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:54:08,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:54:08,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:54:08,995 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:54:08,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:54:08,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:54:08,996 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:54:08,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:54:08,997 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:54:08,997 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:54:08,997 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:54:08,997 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:54:08,998 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:54:08,998 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:54:08,998 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:54:08,998 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:54:08,999 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:54:08,999 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:54:08,999 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:54:08,999 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:54:08,999 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:54:09,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:54:09,001 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:54:09,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:54:09,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:54:09,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:54:09,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:54:09,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:54:09,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:54:09,002 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:54:09,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:54:09,003 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:54:09,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:54:09,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:54:09,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:54:09,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:54:09,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:54:09,004 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:54:09,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:54:09,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:54:09,005 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:54:09,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:54:09,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:54:09,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:54:09,005 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_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2022-11-19 07:54:09,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:54:09,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:54:09,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:54:09,371 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:54:09,372 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:54:09,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-examples/standard_sentinel-2.i [2022-11-19 07:54:09,474 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/data/d23861c6d/3060271d8b7646f5a88e9980b021dcc4/FLAGc7ddc7e20 [2022-11-19 07:54:10,027 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:54:10,027 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2022-11-19 07:54:10,035 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/data/d23861c6d/3060271d8b7646f5a88e9980b021dcc4/FLAGc7ddc7e20 [2022-11-19 07:54:10,367 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/data/d23861c6d/3060271d8b7646f5a88e9980b021dcc4 [2022-11-19 07:54:10,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:54:10,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:54:10,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:54:10,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:54:10,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:54:10,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2625e7f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10, skipping insertion in model container [2022-11-19 07:54:10,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:54:10,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:54:10,614 WARN L234 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_0b376283-0a1e-4fba-b4b0-6c395ae60549/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2022-11-19 07:54:10,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:54:10,652 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:54:10,667 WARN L234 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_0b376283-0a1e-4fba-b4b0-6c395ae60549/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2022-11-19 07:54:10,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:54:10,689 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:54:10,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10 WrapperNode [2022-11-19 07:54:10,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:54:10,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:54:10,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:54:10,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:54:10,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,730 INFO L138 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2022-11-19 07:54:10,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:54:10,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:54:10,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:54:10,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:54:10,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,771 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:54:10,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:54:10,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:54:10,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:54:10,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (1/1) ... [2022-11-19 07:54:10,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:54:10,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:10,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:54:10,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:54:10,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:54:10,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:54:10,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:54:10,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:54:10,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:54:10,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:54:10,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:54:10,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:54:10,951 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:54:10,953 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:54:11,155 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:54:11,182 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:54:11,182 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:54:11,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:11 BoogieIcfgContainer [2022-11-19 07:54:11,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:54:11,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:54:11,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:54:11,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:54:11,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:10" (1/3) ... [2022-11-19 07:54:11,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7d3628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:11, skipping insertion in model container [2022-11-19 07:54:11,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:10" (2/3) ... [2022-11-19 07:54:11,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7d3628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:11, skipping insertion in model container [2022-11-19 07:54:11,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:11" (3/3) ... [2022-11-19 07:54:11,196 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2022-11-19 07:54:11,219 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:54:11,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:54:11,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:54:11,287 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;@2b0b24b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:54:11,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:54:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:11,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:54:11,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:11,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:11,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:11,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:11,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2083082669, now seen corresponding path program 1 times [2022-11-19 07:54:11,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:11,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451894661] [2022-11-19 07:54:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:54:11,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:11,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451894661] [2022-11-19 07:54:11,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451894661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:54:11,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:54:11,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:54:11,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821188960] [2022-11-19 07:54:11,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:54:11,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:54:11,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:11,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:54:11,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:54:11,584 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:11,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:11,644 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2022-11-19 07:54:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:54:11,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:54:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:11,657 INFO L225 Difference]: With dead ends: 23 [2022-11-19 07:54:11,664 INFO L226 Difference]: Without dead ends: 10 [2022-11-19 07:54:11,667 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 [2022-11-19 07:54:11,682 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:11,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:54:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-19 07:54:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-19 07:54:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-11-19 07:54:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-19 07:54:11,728 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2022-11-19 07:54:11,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:11,728 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-19 07:54:11,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-19 07:54:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:54:11,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:11,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:11,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:54:11,730 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:11,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:11,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1530730876, now seen corresponding path program 1 times [2022-11-19 07:54:11,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:11,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295083231] [2022-11-19 07:54:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:11,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:54:11,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:11,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295083231] [2022-11-19 07:54:11,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295083231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:11,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591435879] [2022-11-19 07:54:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:11,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:11,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:11,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:11,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:54:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:54:12,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:54:12,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:54:12,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591435879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:12,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881606296] [2022-11-19 07:54:12,132 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:54:12,132 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:12,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:12,144 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:12,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:12,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:12,311 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:12,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:12,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:12,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:54:12,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:12,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 07:54:12,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:12,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:12,576 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:12,577 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 186 treesize of output 185 [2022-11-19 07:54:12,812 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 [2022-11-19 07:54:12,851 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 15 treesize of output 11 [2022-11-19 07:54:12,885 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:13,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1881606296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:54:13,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:13,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 11 [2022-11-19 07:54:13,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055696658] [2022-11-19 07:54:13,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:54:13,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:54:13,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:13,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:54:13,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:54:13,228 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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) [2022-11-19 07:54:13,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:13,297 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-19 07:54:13,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:54:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:54:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:13,300 INFO L225 Difference]: With dead ends: 16 [2022-11-19 07:54:13,300 INFO L226 Difference]: Without dead ends: 12 [2022-11-19 07:54:13,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:54:13,305 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:13,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 4 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:54:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-19 07:54:13,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-19 07:54:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2022-11-19 07:54:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-11-19 07:54:13,325 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2022-11-19 07:54:13,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:13,325 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-11-19 07:54:13,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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) [2022-11-19 07:54:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-11-19 07:54:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:54:13,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:13,326 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:13,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:13,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:13,534 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:13,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2104881793, now seen corresponding path program 1 times [2022-11-19 07:54:13,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:13,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132308638] [2022-11-19 07:54:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:13,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:54:13,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:13,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132308638] [2022-11-19 07:54:13,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132308638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:13,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342912395] [2022-11-19 07:54:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:13,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:13,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:13,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:13,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:54:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:13,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:54:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:54:13,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:54:13,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342912395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:13,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445332514] [2022-11-19 07:54:13,773 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:54:13,774 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:13,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:13,774 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:13,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:13,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:13,816 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:13,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:13,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:13,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:54:13,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:13,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 07:54:13,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:13,978 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:54:13,979 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 196 treesize of output 184 [2022-11-19 07:54:14,077 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 [2022-11-19 07:54:14,107 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 15 treesize of output 11 [2022-11-19 07:54:14,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:14,592 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '222#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:14,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:14,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:14,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-19 07:54:14,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507208358] [2022-11-19 07:54:14,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:14,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:54:14,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:54:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:54:14,595 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2022-11-19 07:54:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:14,620 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-11-19 07:54:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:54:14,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 11 [2022-11-19 07:54:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:14,622 INFO L225 Difference]: With dead ends: 24 [2022-11-19 07:54:14,622 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 07:54:14,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:54:14,624 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:14,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:54:14,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 07:54:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-19 07:54:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-19 07:54:14,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-11-19 07:54:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:14,633 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-19 07:54:14,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2022-11-19 07:54:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-19 07:54:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:54:14,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:14,634 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:14,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:14,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:14,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:14,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:14,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1572801813, now seen corresponding path program 2 times [2022-11-19 07:54:14,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:14,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145666213] [2022-11-19 07:54:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:14,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:54:15,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:15,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145666213] [2022-11-19 07:54:15,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145666213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:15,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786407055] [2022-11-19 07:54:15,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:54:15,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:15,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:15,062 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:15,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:54:15,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:54:15,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:15,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:54:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:15,151 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 15 treesize of output 11 [2022-11-19 07:54:15,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:54:15,208 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 23 treesize of output 19 [2022-11-19 07:54:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:54:15,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:54:15,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786407055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:15,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671504625] [2022-11-19 07:54:15,436 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:54:15,437 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:15,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:15,437 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:15,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:15,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:15,483 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:15,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:15,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:15,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:54:15,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:15,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 07:54:15,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:15,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:15,642 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:15,643 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 186 treesize of output 185 [2022-11-19 07:54:15,747 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 [2022-11-19 07:54:15,765 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 15 treesize of output 11 [2022-11-19 07:54:15,839 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:16,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '377#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:16,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:16,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:16,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-19 07:54:16,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774572595] [2022-11-19 07:54:16,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:16,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:54:16,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:54:16,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:54:16,263 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2022-11-19 07:54:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:16,493 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-11-19 07:54:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:54:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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 [2022-11-19 07:54:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:16,495 INFO L225 Difference]: With dead ends: 33 [2022-11-19 07:54:16,495 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 07:54:16,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:54:16,497 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:16,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:54:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 07:54:16,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-19 07:54:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-19 07:54:16,508 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-11-19 07:54:16,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:16,508 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-19 07:54:16,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2022-11-19 07:54:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-19 07:54:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:54:16,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:16,510 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:16,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:16,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:16,715 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:16,716 INFO L85 PathProgramCache]: Analyzing trace with hash 534146613, now seen corresponding path program 3 times [2022-11-19 07:54:16,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:16,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415910444] [2022-11-19 07:54:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:16,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:54:16,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:16,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415910444] [2022-11-19 07:54:16,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415910444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:16,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527282081] [2022-11-19 07:54:16,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:54:16,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:16,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:16,928 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:16,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:54:17,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:54:17,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:54:17,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:54:17,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:54:17,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527282081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:17,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1802587153] [2022-11-19 07:54:17,116 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:54:17,117 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:17,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:17,117 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:17,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:17,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:17,154 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:17,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:17,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:54:17,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:17,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 07:54:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:17,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:17,282 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:17,283 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 186 treesize of output 185 [2022-11-19 07:54:17,383 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 [2022-11-19 07:54:17,405 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 15 treesize of output 11 [2022-11-19 07:54:17,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:17,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '591#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:17,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:17,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:17,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-19 07:54:17,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904495674] [2022-11-19 07:54:17,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:17,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:54:17,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:17,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:54:17,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:54:17,804 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 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) [2022-11-19 07:54:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:17,840 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-11-19 07:54:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:54:17,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 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 19 [2022-11-19 07:54:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:17,842 INFO L225 Difference]: With dead ends: 40 [2022-11-19 07:54:17,842 INFO L226 Difference]: Without dead ends: 27 [2022-11-19 07:54:17,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:54:17,843 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:17,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:54:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-19 07:54:17,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-19 07:54:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:17,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-11-19 07:54:17,854 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2022-11-19 07:54:17,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:17,855 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-11-19 07:54:17,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 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) [2022-11-19 07:54:17,855 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-11-19 07:54:17,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:54:17,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:17,856 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:17,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:18,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:18,062 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1218646879, now seen corresponding path program 4 times [2022-11-19 07:54:18,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:18,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356912740] [2022-11-19 07:54:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:18,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:54:18,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:18,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356912740] [2022-11-19 07:54:18,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356912740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:18,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080428989] [2022-11-19 07:54:18,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:54:18,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:18,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:18,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:18,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:54:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:18,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:54:18,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:54:18,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:54:18,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080428989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:18,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762613050] [2022-11-19 07:54:18,842 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:54:18,842 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:18,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:18,843 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:18,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:18,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:18,872 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:54:18,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:54:18,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:18,901 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:18,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:18,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:18,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 07:54:18,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:18,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:19,013 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:19,014 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 186 treesize of output 185 [2022-11-19 07:54:19,090 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 [2022-11-19 07:54:19,104 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 15 treesize of output 11 [2022-11-19 07:54:19,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:19,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '881#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:19,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:19,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:19,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-11-19 07:54:19,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438130035] [2022-11-19 07:54:19,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:19,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 07:54:19,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 07:54:19,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:54:19,538 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 28 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:19,620 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-11-19 07:54:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 07:54:19,621 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 07:54:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:19,623 INFO L225 Difference]: With dead ends: 54 [2022-11-19 07:54:19,623 INFO L226 Difference]: Without dead ends: 41 [2022-11-19 07:54:19,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:54:19,632 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:19,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:54:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-19 07:54:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-19 07:54:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 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) [2022-11-19 07:54:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-11-19 07:54:19,653 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 26 [2022-11-19 07:54:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:19,653 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-11-19 07:54:19,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-11-19 07:54:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 07:54:19,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:19,656 INFO L195 NwaCegarLoop]: trace histogram [26, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:19,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:19,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:19,863 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:19,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:19,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1074687521, now seen corresponding path program 5 times [2022-11-19 07:54:19,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:19,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522045761] [2022-11-19 07:54:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:19,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:54:20,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:20,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522045761] [2022-11-19 07:54:20,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522045761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:20,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121609940] [2022-11-19 07:54:20,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:54:20,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:20,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:20,843 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:20,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:54:20,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:54:20,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:20,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:54:20,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:20,980 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 15 treesize of output 11 [2022-11-19 07:54:21,310 INFO L321 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-19 07:54:21,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 73 [2022-11-19 07:54:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-19 07:54:21,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-19 07:54:22,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121609940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:22,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166168383] [2022-11-19 07:54:22,188 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:54:22,188 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:22,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:22,188 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:22,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:22,219 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:54:22,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:54:22,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:22,248 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:22,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:22,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:22,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 07:54:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:22,361 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:22,362 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 186 treesize of output 185 [2022-11-19 07:54:22,436 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 [2022-11-19 07:54:22,448 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 15 treesize of output 11 [2022-11-19 07:54:22,499 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:23,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1328#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:23,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:23,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:23,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10, 10] total 45 [2022-11-19 07:54:23,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277308401] [2022-11-19 07:54:23,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:23,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:54:23,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:23,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:54:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=2130, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 07:54:23,078 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 45 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 45 states have internal predecessors, (60), 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) [2022-11-19 07:54:26,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:26,193 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2022-11-19 07:54:26,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 07:54:26,193 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 45 states have internal predecessors, (60), 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 40 [2022-11-19 07:54:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:26,194 INFO L225 Difference]: With dead ends: 65 [2022-11-19 07:54:26,194 INFO L226 Difference]: Without dead ends: 48 [2022-11-19 07:54:26,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=590, Invalid=2832, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 07:54:26,197 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:26,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 119 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-19 07:54:26,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-19 07:54:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-19 07:54:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 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) [2022-11-19 07:54:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-11-19 07:54:26,215 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 40 [2022-11-19 07:54:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:26,216 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-11-19 07:54:26,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 45 states have internal predecessors, (60), 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) [2022-11-19 07:54:26,219 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-11-19 07:54:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:54:26,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:26,223 INFO L195 NwaCegarLoop]: trace histogram [27, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:26,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:26,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:26,437 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:26,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1838786906, now seen corresponding path program 6 times [2022-11-19 07:54:26,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:26,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960343604] [2022-11-19 07:54:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:26,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:54:27,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:27,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960343604] [2022-11-19 07:54:27,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960343604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:27,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053018460] [2022-11-19 07:54:27,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:54:27,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:27,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:27,402 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:27,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:54:27,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:54:27,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:27,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:54:27,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:54:27,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:54:28,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053018460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128025255] [2022-11-19 07:54:28,933 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:54:28,934 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:28,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:28,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:28,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:28,965 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:28,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:28,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:28,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:54:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:29,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 07:54:29,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:29,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:29,070 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:54:29,070 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 196 treesize of output 184 [2022-11-19 07:54:29,122 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 [2022-11-19 07:54:29,137 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 15 treesize of output 11 [2022-11-19 07:54:29,196 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:29,683 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1870#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:29,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:29,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:29,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-11-19 07:54:29,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915093763] [2022-11-19 07:54:29,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:29,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-19 07:54:29,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:29,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-19 07:54:29,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1685, Invalid=2475, Unknown=0, NotChecked=0, Total=4160 [2022-11-19 07:54:29,688 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 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) [2022-11-19 07:54:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:29,850 INFO L93 Difference]: Finished difference Result 96 states and 126 transitions. [2022-11-19 07:54:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-19 07:54:29,851 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 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 47 [2022-11-19 07:54:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:29,855 INFO L225 Difference]: With dead ends: 96 [2022-11-19 07:54:29,856 INFO L226 Difference]: Without dead ends: 77 [2022-11-19 07:54:29,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1685, Invalid=2475, Unknown=0, NotChecked=0, Total=4160 [2022-11-19 07:54:29,859 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:29,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:54:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-19 07:54:29,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-19 07:54:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 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) [2022-11-19 07:54:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-11-19 07:54:29,902 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 47 [2022-11-19 07:54:29,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:29,905 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-11-19 07:54:29,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 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) [2022-11-19 07:54:29,905 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-11-19 07:54:29,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 07:54:29,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:29,909 INFO L195 NwaCegarLoop]: trace histogram [56, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:29,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:30,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:30,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:30,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash -385874286, now seen corresponding path program 7 times [2022-11-19 07:54:30,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:30,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435619073] [2022-11-19 07:54:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:30,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:54:33,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:33,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435619073] [2022-11-19 07:54:33,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435619073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:33,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972520074] [2022-11-19 07:54:33,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:54:33,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:33,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:33,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:33,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:54:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:33,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-19 07:54:33,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:54:33,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:54:38,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972520074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:38,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2125484343] [2022-11-19 07:54:38,065 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:54:38,065 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:38,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:38,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:38,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:38,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:38,093 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:54:38,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:54:38,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:38,121 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:38,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:38,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 07:54:38,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:38,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:38,216 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:38,217 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 186 treesize of output 185 [2022-11-19 07:54:38,288 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 [2022-11-19 07:54:38,300 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 15 treesize of output 11 [2022-11-19 07:54:38,359 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:38,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2751#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:38,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:38,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:38,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2022-11-19 07:54:38,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128618535] [2022-11-19 07:54:38,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:38,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-19 07:54:38,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-19 07:54:38,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6702, Invalid=8304, Unknown=0, NotChecked=0, Total=15006 [2022-11-19 07:54:38,986 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 116 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 115 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:39,295 INFO L93 Difference]: Finished difference Result 154 states and 213 transitions. [2022-11-19 07:54:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-19 07:54:39,296 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 115 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-19 07:54:39,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:39,299 INFO L225 Difference]: With dead ends: 154 [2022-11-19 07:54:39,299 INFO L226 Difference]: Without dead ends: 135 [2022-11-19 07:54:39,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=6702, Invalid=8304, Unknown=0, NotChecked=0, Total=15006 [2022-11-19 07:54:39,306 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:39,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:54:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-19 07:54:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-11-19 07:54:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 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) [2022-11-19 07:54:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-11-19 07:54:39,375 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 76 [2022-11-19 07:54:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:39,376 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-11-19 07:54:39,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 115 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:54:39,376 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-11-19 07:54:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-19 07:54:39,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:39,378 INFO L195 NwaCegarLoop]: trace histogram [114, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:39,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:39,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 07:54:39,583 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:39,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1903206162, now seen corresponding path program 8 times [2022-11-19 07:54:39,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:39,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144139551] [2022-11-19 07:54:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:39,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6597 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:54:49,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:49,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144139551] [2022-11-19 07:54:49,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144139551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:49,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602807678] [2022-11-19 07:54:49,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:54:49,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:49,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:49,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:49,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:54:49,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 07:54:49,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:54:49,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-19 07:54:49,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:49,864 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 15 treesize of output 11 [2022-11-19 07:54:51,616 INFO L321 Elim1Store]: treesize reduction 20, result has 82.3 percent of original size [2022-11-19 07:54:51,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 71 treesize of output 119 [2022-11-19 07:54:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6597 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2022-11-19 07:54:52,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:54:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6597 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2022-11-19 07:54:54,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602807678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:54,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [945038580] [2022-11-19 07:54:54,997 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:54:54,998 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:54,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:54,998 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:54,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:55,028 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:54:55,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:54:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:55,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:54:55,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:55,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 07:54:55,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:55,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:55,136 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:54:55,136 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 186 treesize of output 185 [2022-11-19 07:54:55,209 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 [2022-11-19 07:54:55,220 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 15 treesize of output 11 [2022-11-19 07:54:55,267 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:56,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4241#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:56,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:56,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:56,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 16, 16] total 145 [2022-11-19 07:54:56,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454499177] [2022-11-19 07:54:56,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:56,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-19 07:54:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:56,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-19 07:54:56,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7011, Invalid=15941, Unknown=0, NotChecked=0, Total=22952 [2022-11-19 07:54:56,481 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 145 states, 145 states have (on average 1.103448275862069) internal successors, (160), 145 states have internal predecessors, (160), 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) [2022-11-19 07:55:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:01,068 INFO L93 Difference]: Finished difference Result 171 states and 179 transitions. [2022-11-19 07:55:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-11-19 07:55:01,069 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.103448275862069) internal successors, (160), 145 states have internal predecessors, (160), 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 134 [2022-11-19 07:55:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:01,070 INFO L225 Difference]: With dead ends: 171 [2022-11-19 07:55:01,070 INFO L226 Difference]: Without dead ends: 148 [2022-11-19 07:55:01,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4611 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=7228, Invalid=19832, Unknown=0, NotChecked=0, Total=27060 [2022-11-19 07:55:01,074 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:01,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 58 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 380 Invalid, 0 Unknown, 189 Unchecked, 0.3s Time] [2022-11-19 07:55:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-19 07:55:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-19 07:55:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 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) [2022-11-19 07:55:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-11-19 07:55:01,107 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 134 [2022-11-19 07:55:01,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:01,107 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-11-19 07:55:01,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.103448275862069) internal successors, (160), 145 states have internal predecessors, (160), 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) [2022-11-19 07:55:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-11-19 07:55:01,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 07:55:01,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:01,110 INFO L195 NwaCegarLoop]: trace histogram [115, 13, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:01,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:01,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:55:01,316 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:01,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1600793016, now seen corresponding path program 9 times [2022-11-19 07:55:01,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:01,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701655994] [2022-11-19 07:55:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:01,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6826 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-19 07:55:10,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:10,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701655994] [2022-11-19 07:55:10,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701655994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:55:10,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289564317] [2022-11-19 07:55:10,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:55:10,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:10,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:55:10,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:55:10,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:55:10,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:55:10,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:55:10,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-19 07:55:10,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6826 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-19 07:55:11,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:55:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6826 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-19 07:55:27,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289564317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:55:27,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992953089] [2022-11-19 07:55:27,927 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:55:27,927 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:55:27,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:55:27,927 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:55:27,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:55:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:27,966 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:55:27,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:55:27,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:27,991 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:55:27,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:55:28,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:28,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 07:55:28,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:28,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:28,075 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:55:28,076 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 196 treesize of output 184 [2022-11-19 07:55:28,124 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 [2022-11-19 07:55:28,139 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 15 treesize of output 11 [2022-11-19 07:55:28,193 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:55:29,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5968#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:55:29,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:55:29,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:55:29,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 233 [2022-11-19 07:55:29,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631100391] [2022-11-19 07:55:29,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:55:29,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 234 states [2022-11-19 07:55:29,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:55:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 234 interpolants. [2022-11-19 07:55:29,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27293, Invalid=30547, Unknown=0, NotChecked=0, Total=57840 [2022-11-19 07:55:29,161 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 234 states, 234 states have (on average 1.0299145299145298) internal successors, (241), 233 states have internal predecessors, (241), 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) [2022-11-19 07:55:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:29,963 INFO L93 Difference]: Finished difference Result 296 states and 414 transitions. [2022-11-19 07:55:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2022-11-19 07:55:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 234 states, 234 states have (on average 1.0299145299145298) internal successors, (241), 233 states have internal predecessors, (241), 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 147 [2022-11-19 07:55:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:29,966 INFO L225 Difference]: With dead ends: 296 [2022-11-19 07:55:29,966 INFO L226 Difference]: Without dead ends: 265 [2022-11-19 07:55:29,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2425 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=27293, Invalid=30547, Unknown=0, NotChecked=0, Total=57840 [2022-11-19 07:55:29,972 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:29,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:55:29,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-19 07:55:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-11-19 07:55:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 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) [2022-11-19 07:55:30,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2022-11-19 07:55:30,017 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 147 [2022-11-19 07:55:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:30,018 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2022-11-19 07:55:30,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 234 states, 234 states have (on average 1.0299145299145298) internal successors, (241), 233 states have internal predecessors, (241), 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) [2022-11-19 07:55:30,018 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2022-11-19 07:55:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-19 07:55:30,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:30,022 INFO L195 NwaCegarLoop]: trace histogram [232, 13, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:30,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:30,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:55:30,230 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:55:30,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:30,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1527935436, now seen corresponding path program 10 times [2022-11-19 07:55:30,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:55:30,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893779290] [2022-11-19 07:55:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:55:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27184 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-19 07:56:04,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:04,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893779290] [2022-11-19 07:56:04,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893779290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:56:04,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490179214] [2022-11-19 07:56:04,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:56:04,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:04,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:04,218 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:56:04,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:56:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:04,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 2207 conjuncts, 234 conjunts are in the unsatisfiable core [2022-11-19 07:56:04,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 27184 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-19 07:56:05,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 27184 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-19 07:57:11,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490179214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:11,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1548516357] [2022-11-19 07:57:11,781 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:57:11,782 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:57:11,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:57:11,782 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:57:11,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:57:11,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:11,813 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:57:11,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-19 07:57:11,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:11,844 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:57:11,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 07:57:11,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:11,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 07:57:11,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:11,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:11,930 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:57:11,931 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 196 treesize of output 184 [2022-11-19 07:57:11,974 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 [2022-11-19 07:57:11,992 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 15 treesize of output 11 [2022-11-19 07:57:12,037 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:57:13,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9087#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:57:13,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:57:13,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:57:13,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [234, 234, 234] total 467 [2022-11-19 07:57:13,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270218587] [2022-11-19 07:57:13,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:57:13,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 468 states [2022-11-19 07:57:13,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:13,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 468 interpolants. [2022-11-19 07:57:13,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109310, Invalid=115840, Unknown=0, NotChecked=0, Total=225150 [2022-11-19 07:57:13,771 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 468 states, 468 states have (on average 1.014957264957265) internal successors, (475), 467 states have internal predecessors, (475), 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) [2022-11-19 07:57:17,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:17,488 INFO L93 Difference]: Finished difference Result 530 states and 765 transitions. [2022-11-19 07:57:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2022-11-19 07:57:17,491 INFO L78 Accepts]: Start accepts. Automaton has has 468 states, 468 states have (on average 1.014957264957265) internal successors, (475), 467 states have internal predecessors, (475), 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 264 [2022-11-19 07:57:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:17,494 INFO L225 Difference]: With dead ends: 530 [2022-11-19 07:57:17,494 INFO L226 Difference]: Without dead ends: 499 [2022-11-19 07:57:17,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 551 SyntacticMatches, 0 SemanticMatches, 473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4882 ImplicationChecksByTransitivity, 89.6s TimeCoverageRelationStatistics Valid=109310, Invalid=115840, Unknown=0, NotChecked=0, Total=225150 [2022-11-19 07:57:17,510 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:17,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:57:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-19 07:57:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2022-11-19 07:57:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.0040160642570282) internal successors, (500), 498 states have internal predecessors, (500), 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) [2022-11-19 07:57:17,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 500 transitions. [2022-11-19 07:57:17,591 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 500 transitions. Word has length 264 [2022-11-19 07:57:17,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:17,591 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 500 transitions. [2022-11-19 07:57:17,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 468 states, 468 states have (on average 1.014957264957265) internal successors, (475), 467 states have internal predecessors, (475), 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) [2022-11-19 07:57:17,592 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 500 transitions. [2022-11-19 07:57:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-11-19 07:57:17,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:17,602 INFO L195 NwaCegarLoop]: trace histogram [466, 13, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:17,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:17,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:57:17,811 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:17,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:17,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1124680372, now seen corresponding path program 11 times [2022-11-19 07:57:17,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:17,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782337685] [2022-11-19 07:57:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:17,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 108967 backedges. 0 proven. 108811 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-19 07:59:35,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:59:35,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782337685] [2022-11-19 07:59:35,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782337685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:59:35,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134220240] [2022-11-19 07:59:35,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:59:35,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:59:35,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:59:35,014 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:59:35,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:59:39,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-19 07:59:39,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:59:39,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-19 07:59:39,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:40,315 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 15 treesize of output 11 [2022-11-19 07:59:52,352 INFO L321 Elim1Store]: treesize reduction 44, result has 86.5 percent of original size [2022-11-19 07:59:52,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 46 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 111 treesize of output 333 [2022-11-19 07:59:54,312 WARN L718 sPolynomialRelations]: Constructing 4096(two to the power of 12 dual juncts. [2022-11-19 07:59:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 108967 backedges. 0 proven. 2476 refuted. 0 times theorem prover too weak. 106491 trivial. 0 not checked. [2022-11-19 07:59:54,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:12,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 196 treesize of output 172 [2022-11-19 08:00:12,289 INFO L321 Elim1Store]: treesize reduction 202, result has 0.5 percent of original size [2022-11-19 08:00:12,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 244 treesize of output 1 [2022-11-19 08:00:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 108967 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 108811 trivial. 0 not checked. [2022-11-19 08:00:12,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134220240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:12,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1380544084] [2022-11-19 08:00:12,310 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 08:00:12,310 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:12,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:12,311 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:12,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:12,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:12,335 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:00:12,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-19 08:00:12,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:12,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 08:00:12,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:12,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-19 08:00:12,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:12,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:12,413 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 08:00:12,414 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 196 treesize of output 184 [2022-11-19 08:00:12,461 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 [2022-11-19 08:00:12,476 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 15 treesize of output 11 [2022-11-19 08:00:12,516 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:15,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14605#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:00:15,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:15,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:00:15,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [468, 33, 28] total 527 [2022-11-19 08:00:15,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014335897] [2022-11-19 08:00:15,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:15,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 527 states [2022-11-19 08:00:15,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:15,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 527 interpolants. [2022-11-19 08:00:15,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112743, Invalid=171879, Unknown=0, NotChecked=0, Total=284622 [2022-11-19 08:00:15,991 INFO L87 Difference]: Start difference. First operand 499 states and 500 transitions. Second operand has 527 states, 527 states have (on average 1.032258064516129) internal successors, (544), 527 states have internal predecessors, (544), 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) [2022-11-19 08:03:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:06,522 INFO L93 Difference]: Finished difference Result 559 states and 573 transitions. [2022-11-19 08:03:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 521 states. [2022-11-19 08:03:06,523 INFO L78 Accepts]: Start accepts. Automaton has has 527 states, 527 states have (on average 1.032258064516129) internal successors, (544), 527 states have internal predecessors, (544), 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 498 [2022-11-19 08:03:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:06,525 INFO L225 Difference]: With dead ends: 559 [2022-11-19 08:03:06,525 INFO L226 Difference]: Without dead ends: 524 [2022-11-19 08:03:06,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2450 GetRequests, 1428 SyntacticMatches, 0 SemanticMatches, 1022 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166161 ImplicationChecksByTransitivity, 280.2s TimeCoverageRelationStatistics Valid=330895, Invalid=716657, Unknown=0, NotChecked=0, Total=1047552 [2022-11-19 08:03:06,569 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 171 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:06,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 67 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1011 Invalid, 0 Unknown, 291 Unchecked, 1.0s Time] [2022-11-19 08:03:06,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-11-19 08:03:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2022-11-19 08:03:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.0038240917782026) internal successors, (525), 523 states have internal predecessors, (525), 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) [2022-11-19 08:03:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 525 transitions. [2022-11-19 08:03:06,630 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 525 transitions. Word has length 498 [2022-11-19 08:03:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:06,631 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 525 transitions. [2022-11-19 08:03:06,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 527 states, 527 states have (on average 1.032258064516129) internal successors, (544), 527 states have internal predecessors, (544), 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) [2022-11-19 08:03:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 525 transitions. [2022-11-19 08:03:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-11-19 08:03:06,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:06,644 INFO L195 NwaCegarLoop]: trace histogram [467, 25, 24, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:06,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-19 08:03:06,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:03:06,853 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:06,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:06,854 INFO L85 PathProgramCache]: Analyzing trace with hash -570306420, now seen corresponding path program 12 times [2022-11-19 08:03:06,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:06,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192366396] [2022-11-19 08:03:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:06,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 109878 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-11-19 08:05:28,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:28,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192366396] [2022-11-19 08:05:28,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192366396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:28,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008796104] [2022-11-19 08:05:28,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:05:28,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:28,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:28,294 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:28,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b376283-0a1e-4fba-b4b0-6c395ae60549/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:05:29,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:05:29,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:05:29,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 4382 conjuncts, 469 conjunts are in the unsatisfiable core [2022-11-19 08:05:29,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 109878 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-11-19 08:05:30,402 INFO L328 TraceCheckSpWp]: Computing backward predicates...