./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a94ea84ce989fbbbaf2c8eaba75d5160290d15621b4e8c8582440d0d85685d8d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:34:57,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:34:57,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:34:57,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:34:57,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:34:57,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:34:57,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:34:57,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:34:57,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:34:57,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:34:57,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:34:57,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:34:57,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:34:57,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:34:57,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:34:57,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:34:57,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:34:57,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:34:57,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:34:57,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:34:57,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:34:57,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:34:57,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:34:57,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:34:57,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:34:57,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:34:57,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:34:57,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:34:57,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:34:57,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:34:57,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:34:57,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:34:57,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:34:57,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:34:57,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:34:57,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:34:57,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:34:57,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:34:57,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:34:57,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:34:57,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:34:57,189 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:34:57,238 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:34:57,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:34:57,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:34:57,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:34:57,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:34:57,241 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:34:57,241 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:34:57,241 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:34:57,241 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:34:57,242 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:34:57,243 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:34:57,243 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:34:57,244 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:34:57,244 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:34:57,244 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:34:57,244 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:34:57,245 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:34:57,245 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:34:57,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:34:57,246 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:34:57,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:34:57,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:34:57,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:34:57,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:34:57,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:34:57,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:34:57,248 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:34:57,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:34:57,248 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:34:57,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:34:57,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:34:57,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:34:57,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:57,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:34:57,250 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:34:57,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:34:57,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:34:57,251 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:34:57,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:34:57,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:34:57,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:34:57,252 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_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a94ea84ce989fbbbaf2c8eaba75d5160290d15621b4e8c8582440d0d85685d8d [2022-11-03 02:34:57,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:34:57,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:34:57,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:34:57,623 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:34:57,624 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:34:57,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c [2022-11-03 02:34:57,699 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/data/de4d1ca82/0b3caa78425c4bd0963952e8ca1066d6/FLAGe2b379437 [2022-11-03 02:34:58,344 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:34:58,345 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c [2022-11-03 02:34:58,363 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/data/de4d1ca82/0b3caa78425c4bd0963952e8ca1066d6/FLAGe2b379437 [2022-11-03 02:34:58,590 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/data/de4d1ca82/0b3caa78425c4bd0963952e8ca1066d6 [2022-11-03 02:34:58,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:34:58,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:34:58,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:58,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:34:58,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:34:58,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a496fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:58, skipping insertion in model container [2022-11-03 02:34:58,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:58" (1/1) ... [2022-11-03 02:34:58,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:34:58,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:34:59,250 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c[65523,65536] [2022-11-03 02:34:59,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:59,299 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:34:59,398 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c[65523,65536] [2022-11-03 02:34:59,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:59,421 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:34:59,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59 WrapperNode [2022-11-03 02:34:59,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:59,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:59,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:34:59,424 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:34:59,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (1/1) ... [2022-11-03 02:34:59,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (1/1) ... [2022-11-03 02:34:59,508 INFO L138 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 724 [2022-11-03 02:34:59,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:59,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:34:59,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:34:59,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:34:59,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (1/1) ... [2022-11-03 02:34:59,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (1/1) ... [2022-11-03 02:34:59,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (1/1) ... [2022-11-03 02:34:59,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (1/1) ... [2022-11-03 02:34:59,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (1/1) ... [2022-11-03 02:34:59,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (1/1) ... [2022-11-03 02:34:59,644 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (1/1) ... [2022-11-03 02:34:59,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (1/1) ... [2022-11-03 02:34:59,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:34:59,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:34:59,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:34:59,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:34:59,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (1/1) ... [2022-11-03 02:34:59,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:59,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:34:59,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:34:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:34:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:34:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:34:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:34:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:34:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:34:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:34:59,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:34:59,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:35:00,055 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:35:00,070 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:35:00,095 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-03 02:35:03,310 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2022-11-03 02:35:03,310 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2022-11-03 02:35:03,310 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:35:03,825 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:35:03,825 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:35:03,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:03 BoogieIcfgContainer [2022-11-03 02:35:03,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:35:03,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:35:03,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:35:03,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:35:03,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:34:58" (1/3) ... [2022-11-03 02:35:03,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbbcf20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:03, skipping insertion in model container [2022-11-03 02:35:03,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:59" (2/3) ... [2022-11-03 02:35:03,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbbcf20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:03, skipping insertion in model container [2022-11-03 02:35:03,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:03" (3/3) ... [2022-11-03 02:35:03,848 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.01.i.cil-1.c [2022-11-03 02:35:03,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:35:03,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:35:03,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:35:03,973 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;@1054ed28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:35:03,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:35:03,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 1.7380952380952381) internal successors, (146), 85 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:03,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:35:03,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:03,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:03,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash -489643160, now seen corresponding path program 1 times [2022-11-03 02:35:04,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:04,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277749078] [2022-11-03 02:35:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:05,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:05,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277749078] [2022-11-03 02:35:05,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277749078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:05,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:05,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:05,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538664967] [2022-11-03 02:35:05,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:05,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:05,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:05,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:05,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:05,623 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 1.7380952380952381) internal successors, (146), 85 states have internal predecessors, (146), 0 states have call successors, (0), 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 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:07,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:09,028 INFO L93 Difference]: Finished difference Result 253 states and 430 transitions. [2022-11-03 02:35:09,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:09,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:35:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:09,057 INFO L225 Difference]: With dead ends: 253 [2022-11-03 02:35:09,057 INFO L226 Difference]: Without dead ends: 162 [2022-11-03 02:35:09,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:09,065 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 98 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:09,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 233 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:35:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-03 02:35:09,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2022-11-03 02:35:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.5192307692307692) internal successors, (158), 104 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:09,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 158 transitions. [2022-11-03 02:35:09,123 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 158 transitions. Word has length 19 [2022-11-03 02:35:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:09,123 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 158 transitions. [2022-11-03 02:35:09,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:09,124 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 158 transitions. [2022-11-03 02:35:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:35:09,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:09,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:09,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:35:09,127 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:09,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:09,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1996513265, now seen corresponding path program 1 times [2022-11-03 02:35:09,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:09,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139355630] [2022-11-03 02:35:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:09,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:09,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:09,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139355630] [2022-11-03 02:35:09,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139355630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:09,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:09,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:09,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916551341] [2022-11-03 02:35:09,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:09,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:09,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:09,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:09,767 INFO L87 Difference]: Start difference. First operand 105 states and 158 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:11,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:12,919 INFO L93 Difference]: Finished difference Result 211 states and 318 transitions. [2022-11-03 02:35:12,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:12,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 02:35:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:12,923 INFO L225 Difference]: With dead ends: 211 [2022-11-03 02:35:12,923 INFO L226 Difference]: Without dead ends: 107 [2022-11-03 02:35:12,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:12,925 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:12,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 260 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 02:35:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-03 02:35:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-03 02:35:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 106 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) [2022-11-03 02:35:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 160 transitions. [2022-11-03 02:35:12,962 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 160 transitions. Word has length 20 [2022-11-03 02:35:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:12,963 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 160 transitions. [2022-11-03 02:35:12,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 160 transitions. [2022-11-03 02:35:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:35:12,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:12,965 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:12,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:35:12,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:12,966 INFO L85 PathProgramCache]: Analyzing trace with hash -368908684, now seen corresponding path program 1 times [2022-11-03 02:35:12,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:12,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437361761] [2022-11-03 02:35:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:12,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:35:13,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:13,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437361761] [2022-11-03 02:35:13,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437361761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:13,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:13,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:35:13,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984092224] [2022-11-03 02:35:13,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:13,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:13,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:13,379 INFO L87 Difference]: Start difference. First operand 107 states and 160 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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) [2022-11-03 02:35:15,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:16,241 INFO L93 Difference]: Finished difference Result 210 states and 316 transitions. [2022-11-03 02:35:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:16,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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 31 [2022-11-03 02:35:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:16,244 INFO L225 Difference]: With dead ends: 210 [2022-11-03 02:35:16,244 INFO L226 Difference]: Without dead ends: 208 [2022-11-03 02:35:16,244 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 [2022-11-03 02:35:16,246 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 84 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:16,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 201 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 02:35:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-03 02:35:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-11-03 02:35:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.5194174757281553) internal successors, (313), 206 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 313 transitions. [2022-11-03 02:35:16,267 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 313 transitions. Word has length 31 [2022-11-03 02:35:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:16,268 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 313 transitions. [2022-11-03 02:35:16,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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) [2022-11-03 02:35:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 313 transitions. [2022-11-03 02:35:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 02:35:16,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:16,270 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:16,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:35:16,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1639827657, now seen corresponding path program 1 times [2022-11-03 02:35:16,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:16,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581748737] [2022-11-03 02:35:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:16,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:35:17,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:17,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581748737] [2022-11-03 02:35:17,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581748737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:17,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:17,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:17,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891715477] [2022-11-03 02:35:17,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:17,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:17,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:17,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:17,068 INFO L87 Difference]: Start difference. First operand 207 states and 313 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) [2022-11-03 02:35:19,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:20,064 INFO L93 Difference]: Finished difference Result 565 states and 851 transitions. [2022-11-03 02:35:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:20,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) Word has length 43 [2022-11-03 02:35:20,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:20,067 INFO L225 Difference]: With dead ends: 565 [2022-11-03 02:35:20,067 INFO L226 Difference]: Without dead ends: 361 [2022-11-03 02:35:20,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:20,070 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 76 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:20,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 169 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 179 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 02:35:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-03 02:35:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 253. [2022-11-03 02:35:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.5595238095238095) internal successors, (393), 252 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 393 transitions. [2022-11-03 02:35:20,095 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 393 transitions. Word has length 43 [2022-11-03 02:35:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:20,095 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 393 transitions. [2022-11-03 02:35:20,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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) [2022-11-03 02:35:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 393 transitions. [2022-11-03 02:35:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:35:20,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:20,099 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:20,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:35:20,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:20,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2057073605, now seen corresponding path program 1 times [2022-11-03 02:35:20,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:20,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853645253] [2022-11-03 02:35:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:20,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:35:20,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:20,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853645253] [2022-11-03 02:35:20,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853645253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:20,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:20,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:20,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637862927] [2022-11-03 02:35:20,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:20,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:20,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:20,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:20,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:20,757 INFO L87 Difference]: Start difference. First operand 253 states and 393 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:22,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:23,830 INFO L93 Difference]: Finished difference Result 407 states and 629 transitions. [2022-11-03 02:35:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:23,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 61 [2022-11-03 02:35:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:23,834 INFO L225 Difference]: With dead ends: 407 [2022-11-03 02:35:23,834 INFO L226 Difference]: Without dead ends: 280 [2022-11-03 02:35:23,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:23,842 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 18 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:23,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 292 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 02:35:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-03 02:35:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 269. [2022-11-03 02:35:23,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.5634328358208955) internal successors, (419), 268 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 419 transitions. [2022-11-03 02:35:23,883 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 419 transitions. Word has length 61 [2022-11-03 02:35:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:23,884 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 419 transitions. [2022-11-03 02:35:23,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 419 transitions. [2022-11-03 02:35:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 02:35:23,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:23,887 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:23,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:35:23,887 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:23,888 INFO L85 PathProgramCache]: Analyzing trace with hash -796842948, now seen corresponding path program 2 times [2022-11-03 02:35:23,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:23,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161550112] [2022-11-03 02:35:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:23,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:35:24,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:24,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161550112] [2022-11-03 02:35:24,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161550112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:24,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:24,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:24,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528697357] [2022-11-03 02:35:24,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:24,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:24,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:24,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:24,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:24,713 INFO L87 Difference]: Start difference. First operand 269 states and 419 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:26,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:27,362 INFO L93 Difference]: Finished difference Result 423 states and 654 transitions. [2022-11-03 02:35:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:27,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-03 02:35:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:27,365 INFO L225 Difference]: With dead ends: 423 [2022-11-03 02:35:27,365 INFO L226 Difference]: Without dead ends: 280 [2022-11-03 02:35:27,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:27,367 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 25 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:27,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 296 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 135 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:35:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-03 02:35:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 269. [2022-11-03 02:35:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.5597014925373134) internal successors, (418), 268 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 418 transitions. [2022-11-03 02:35:27,386 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 418 transitions. Word has length 72 [2022-11-03 02:35:27,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:27,387 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 418 transitions. [2022-11-03 02:35:27,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 418 transitions. [2022-11-03 02:35:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:35:27,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:27,389 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:27,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:35:27,390 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:27,391 INFO L85 PathProgramCache]: Analyzing trace with hash 664076225, now seen corresponding path program 1 times [2022-11-03 02:35:27,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:27,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931116817] [2022-11-03 02:35:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:27,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:35:28,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:28,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931116817] [2022-11-03 02:35:28,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931116817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:28,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:28,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:28,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818577925] [2022-11-03 02:35:28,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:28,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:28,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:28,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:28,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:28,112 INFO L87 Difference]: Start difference. First operand 269 states and 418 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:30,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:30,897 INFO L93 Difference]: Finished difference Result 643 states and 979 transitions. [2022-11-03 02:35:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 73 [2022-11-03 02:35:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:30,900 INFO L225 Difference]: With dead ends: 643 [2022-11-03 02:35:30,900 INFO L226 Difference]: Without dead ends: 377 [2022-11-03 02:35:30,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:30,902 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 88 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:30,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 169 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 179 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 02:35:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-03 02:35:30,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 269. [2022-11-03 02:35:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.541044776119403) internal successors, (413), 268 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 413 transitions. [2022-11-03 02:35:30,929 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 413 transitions. Word has length 73 [2022-11-03 02:35:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:30,929 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 413 transitions. [2022-11-03 02:35:30,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 413 transitions. [2022-11-03 02:35:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:35:30,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:30,932 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:30,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:35:30,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:30,933 INFO L85 PathProgramCache]: Analyzing trace with hash 401481100, now seen corresponding path program 1 times [2022-11-03 02:35:30,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:30,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764914618] [2022-11-03 02:35:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:30,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:35:31,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:31,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764914618] [2022-11-03 02:35:31,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764914618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:31,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:31,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:31,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608767187] [2022-11-03 02:35:31,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:31,671 INFO L87 Difference]: Start difference. First operand 269 states and 413 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:33,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:34,842 INFO L93 Difference]: Finished difference Result 643 states and 969 transitions. [2022-11-03 02:35:34,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:34,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 74 [2022-11-03 02:35:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:34,845 INFO L225 Difference]: With dead ends: 643 [2022-11-03 02:35:34,846 INFO L226 Difference]: Without dead ends: 377 [2022-11-03 02:35:34,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:34,847 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 86 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:34,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 183 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 183 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 02:35:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-03 02:35:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 269. [2022-11-03 02:35:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.5223880597014925) internal successors, (408), 268 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 408 transitions. [2022-11-03 02:35:34,867 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 408 transitions. Word has length 74 [2022-11-03 02:35:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:34,868 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 408 transitions. [2022-11-03 02:35:34,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 408 transitions. [2022-11-03 02:35:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 02:35:34,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:34,870 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:34,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:35:34,870 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash 2115729510, now seen corresponding path program 1 times [2022-11-03 02:35:34,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:34,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268298174] [2022-11-03 02:35:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:34,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:35:35,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:35,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268298174] [2022-11-03 02:35:35,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268298174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:35,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:35,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:35,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588561756] [2022-11-03 02:35:35,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:35,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:35,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:35,495 INFO L87 Difference]: Start difference. First operand 269 states and 408 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:37,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:38,407 INFO L93 Difference]: Finished difference Result 423 states and 636 transitions. [2022-11-03 02:35:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:38,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 75 [2022-11-03 02:35:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:38,411 INFO L225 Difference]: With dead ends: 423 [2022-11-03 02:35:38,411 INFO L226 Difference]: Without dead ends: 280 [2022-11-03 02:35:38,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:38,412 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 19 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:38,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 288 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 137 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 02:35:38,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-03 02:35:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 269. [2022-11-03 02:35:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.5186567164179106) internal successors, (407), 268 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 407 transitions. [2022-11-03 02:35:38,433 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 407 transitions. Word has length 75 [2022-11-03 02:35:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:38,433 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 407 transitions. [2022-11-03 02:35:38,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 407 transitions. [2022-11-03 02:35:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 02:35:38,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:38,435 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:38,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:35:38,436 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:38,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:38,442 INFO L85 PathProgramCache]: Analyzing trace with hash 97155664, now seen corresponding path program 1 times [2022-11-03 02:35:38,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:38,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840710252] [2022-11-03 02:35:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:38,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:35:39,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:39,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840710252] [2022-11-03 02:35:39,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840710252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:39,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:39,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:35:39,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076483574] [2022-11-03 02:35:39,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:39,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:35:39,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:39,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:35:39,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:35:39,813 INFO L87 Difference]: Start difference. First operand 269 states and 407 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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) [2022-11-03 02:35:41,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:44,373 INFO L93 Difference]: Finished difference Result 689 states and 1033 transitions. [2022-11-03 02:35:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:35:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 75 [2022-11-03 02:35:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:44,378 INFO L225 Difference]: With dead ends: 689 [2022-11-03 02:35:44,378 INFO L226 Difference]: Without dead ends: 423 [2022-11-03 02:35:44,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:35:44,380 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 74 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:44,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 501 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 437 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 02:35:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-03 02:35:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 309. [2022-11-03 02:35:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.5292207792207793) internal successors, (471), 308 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 471 transitions. [2022-11-03 02:35:44,399 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 471 transitions. Word has length 75 [2022-11-03 02:35:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:44,401 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 471 transitions. [2022-11-03 02:35:44,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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) [2022-11-03 02:35:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 471 transitions. [2022-11-03 02:35:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:35:44,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:44,403 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:44,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:35:44,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash 687618065, now seen corresponding path program 1 times [2022-11-03 02:35:44,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:44,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379461739] [2022-11-03 02:35:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:44,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:35:45,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:45,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379461739] [2022-11-03 02:35:45,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379461739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:45,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:45,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:45,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287962425] [2022-11-03 02:35:45,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:45,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:45,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:45,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:45,093 INFO L87 Difference]: Start difference. First operand 309 states and 471 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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) [2022-11-03 02:35:47,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:48,676 INFO L93 Difference]: Finished difference Result 723 states and 1085 transitions. [2022-11-03 02:35:48,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:48,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 76 [2022-11-03 02:35:48,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:48,680 INFO L225 Difference]: With dead ends: 723 [2022-11-03 02:35:48,680 INFO L226 Difference]: Without dead ends: 417 [2022-11-03 02:35:48,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:48,682 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 83 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:48,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 169 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 179 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 02:35:48,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-03 02:35:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 309. [2022-11-03 02:35:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.5064935064935066) internal successors, (464), 308 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 464 transitions. [2022-11-03 02:35:48,702 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 464 transitions. Word has length 76 [2022-11-03 02:35:48,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:48,703 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 464 transitions. [2022-11-03 02:35:48,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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) [2022-11-03 02:35:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 464 transitions. [2022-11-03 02:35:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:35:48,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:48,708 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:48,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:35:48,708 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1486714875, now seen corresponding path program 1 times [2022-11-03 02:35:48,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:48,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061659511] [2022-11-03 02:35:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:48,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:35:49,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:49,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061659511] [2022-11-03 02:35:49,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061659511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:49,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784810362] [2022-11-03 02:35:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:49,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:49,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:49,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:49,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:35:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:50,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:35:50,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:35:50,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 02:35:50,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784810362] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:50,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:35:50,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 6 [2022-11-03 02:35:50,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762281228] [2022-11-03 02:35:50,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:50,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:50,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:50,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:50,836 INFO L87 Difference]: Start difference. First operand 309 states and 464 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:52,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:53,693 INFO L93 Difference]: Finished difference Result 613 states and 923 transitions. [2022-11-03 02:35:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:53,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:35:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:53,696 INFO L225 Difference]: With dead ends: 613 [2022-11-03 02:35:53,697 INFO L226 Difference]: Without dead ends: 611 [2022-11-03 02:35:53,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:35:53,698 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 78 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:53,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 201 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 02:35:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-03 02:35:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 609. [2022-11-03 02:35:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.511513157894737) internal successors, (919), 608 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 919 transitions. [2022-11-03 02:35:53,738 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 919 transitions. Word has length 76 [2022-11-03 02:35:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:53,738 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 919 transitions. [2022-11-03 02:35:53,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 919 transitions. [2022-11-03 02:35:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 02:35:53,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:53,741 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:53,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:53,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:53,957 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:53,957 INFO L85 PathProgramCache]: Analyzing trace with hash 697847799, now seen corresponding path program 1 times [2022-11-03 02:35:53,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:53,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959573427] [2022-11-03 02:35:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:53,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:35:54,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:54,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959573427] [2022-11-03 02:35:54,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959573427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:54,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142000773] [2022-11-03 02:35:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:54,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:54,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:54,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:54,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc838d4c-c3e6-48e0-ade3-f7ab12e84e95/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:35:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:55,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:35:55,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-03 02:35:56,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:35:56,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142000773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:56,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1921023583] [2022-11-03 02:35:56,836 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-03 02:35:56,836 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:35:56,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:35:56,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:35:56,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:36:09,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:09,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:09,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:09,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:09,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:09,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:10,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:10,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:10,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:10,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:10,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:10,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:10,821 INFO L244 Elim1Store]: Index analysis took 631 ms [2022-11-03 02:36:10,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 32 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 35 new quantified variables, introduced 0 case distinctions, treesize of input 9143930 treesize of output 9270634 [2022-11-03 02:36:18,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:18,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:18,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:19,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:19,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:19,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:22,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:22,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:22,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:22,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:23,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:36:23,338 INFO L244 Elim1Store]: Index analysis took 1144 ms