./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/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_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/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_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/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 f3302497ea925232664f79330834ccdc9bbd9e62586cb93dfb7cf8f1101390c2 --- 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 03:56:44,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:56:44,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:56:44,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:56:44,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:56:44,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:56:44,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:56:44,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:56:44,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:56:44,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:56:44,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:56:44,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:56:44,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:56:44,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:56:44,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:56:44,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:56:44,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:56:44,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:56:44,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:56:44,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:56:44,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:56:44,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:56:44,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:56:44,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:56:44,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:56:44,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:56:44,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:56:44,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:56:44,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:56:44,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:56:44,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:56:44,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:56:44,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:56:44,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:56:44,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:56:44,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:56:44,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:56:44,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:56:44,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:56:44,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:56:44,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:56:44,425 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:56:44,472 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:56:44,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:56:44,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:56:44,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:56:44,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:56:44,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:56:44,474 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:56:44,474 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:56:44,475 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:56:44,475 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:56:44,476 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:56:44,476 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:56:44,476 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:56:44,477 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:56:44,477 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:56:44,477 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:56:44,477 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:56:44,477 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:56:44,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:56:44,478 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:56:44,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:56:44,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:56:44,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:56:44,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:56:44,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:56:44,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:56:44,480 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:56:44,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:56:44,480 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:56:44,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:56:44,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:56:44,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:56:44,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:44,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:56:44,482 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:56:44,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:56:44,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:56:44,483 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:56:44,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:56:44,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:56:44,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:56:44,484 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_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3302497ea925232664f79330834ccdc9bbd9e62586cb93dfb7cf8f1101390c2 [2022-11-03 03:56:44,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:56:44,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:56:44,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:56:44,919 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:56:44,920 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:56:44,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-03 03:56:45,001 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/data/49bab0df8/9f0a033722b64359ac3e03bb0a837d4a/FLAG39dc67444 [2022-11-03 03:56:45,671 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:56:45,671 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-03 03:56:45,683 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/data/49bab0df8/9f0a033722b64359ac3e03bb0a837d4a/FLAG39dc67444 [2022-11-03 03:56:45,957 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/data/49bab0df8/9f0a033722b64359ac3e03bb0a837d4a [2022-11-03 03:56:45,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:56:45,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:56:45,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:45,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:56:45,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:56:45,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:45" (1/1) ... [2022-11-03 03:56:45,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@345694cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:45, skipping insertion in model container [2022-11-03 03:56:45,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:45" (1/1) ... [2022-11-03 03:56:45,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:56:46,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:56:46,306 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_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2022-11-03 03:56:46,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:46,365 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:56:46,420 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_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2022-11-03 03:56:46,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:46,473 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:56:46,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46 WrapperNode [2022-11-03 03:56:46,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:46,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:46,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:56:46,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:56:46,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (1/1) ... [2022-11-03 03:56:46,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (1/1) ... [2022-11-03 03:56:46,575 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 607 [2022-11-03 03:56:46,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:46,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:56:46,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:56:46,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:56:46,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (1/1) ... [2022-11-03 03:56:46,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (1/1) ... [2022-11-03 03:56:46,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (1/1) ... [2022-11-03 03:56:46,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (1/1) ... [2022-11-03 03:56:46,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (1/1) ... [2022-11-03 03:56:46,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (1/1) ... [2022-11-03 03:56:46,612 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (1/1) ... [2022-11-03 03:56:46,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (1/1) ... [2022-11-03 03:56:46,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:56:46,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:56:46,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:56:46,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:56:46,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (1/1) ... [2022-11-03 03:56:46,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:46,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:46,683 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:56:46,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:56:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:56:46,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:56:46,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:56:46,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:56:46,987 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:56:46,989 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:56:47,819 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:56:48,031 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:56:48,031 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 03:56:48,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:48 BoogieIcfgContainer [2022-11-03 03:56:48,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:56:48,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:56:48,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:56:48,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:56:48,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:56:45" (1/3) ... [2022-11-03 03:56:48,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551ee19e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:48, skipping insertion in model container [2022-11-03 03:56:48,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:46" (2/3) ... [2022-11-03 03:56:48,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@551ee19e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:48, skipping insertion in model container [2022-11-03 03:56:48,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:48" (3/3) ... [2022-11-03 03:56:48,046 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-03 03:56:48,068 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:56:48,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:56:48,137 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:56:48,148 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;@3c5d205a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:56:48,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:56:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 120 states have (on average 1.6916666666666667) internal successors, (203), 121 states have internal predecessors, (203), 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 03:56:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 03:56:48,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:48,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1] [2022-11-03 03:56:48,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:48,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:48,187 INFO L85 PathProgramCache]: Analyzing trace with hash -265646700, now seen corresponding path program 1 times [2022-11-03 03:56:48,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:48,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627960088] [2022-11-03 03:56:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:48,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:48,833 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 03:56:48,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:48,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627960088] [2022-11-03 03:56:48,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627960088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:48,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:48,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:48,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710303605] [2022-11-03 03:56:48,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:48,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:48,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:48,878 INFO L87 Difference]: Start difference. First operand has 122 states, 120 states have (on average 1.6916666666666667) internal successors, (203), 121 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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 03:56:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:49,027 INFO L93 Difference]: Finished difference Result 274 states and 430 transitions. [2022-11-03 03:56:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:49,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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 58 [2022-11-03 03:56:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:49,044 INFO L225 Difference]: With dead ends: 274 [2022-11-03 03:56:49,044 INFO L226 Difference]: Without dead ends: 191 [2022-11-03 03:56:49,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:49,056 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 150 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:49,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 399 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-03 03:56:49,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2022-11-03 03:56:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.4042553191489362) internal successors, (264), 188 states have internal predecessors, (264), 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 03:56:49,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 264 transitions. [2022-11-03 03:56:49,154 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 264 transitions. Word has length 58 [2022-11-03 03:56:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:49,155 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 264 transitions. [2022-11-03 03:56:49,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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 03:56:49,155 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 264 transitions. [2022-11-03 03:56:49,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 03:56:49,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:49,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:49,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:56:49,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:49,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1158426643, now seen corresponding path program 1 times [2022-11-03 03:56:49,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:49,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42631797] [2022-11-03 03:56:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:49,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:49,416 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 03:56:49,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:49,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42631797] [2022-11-03 03:56:49,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42631797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:49,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:49,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:49,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343231185] [2022-11-03 03:56:49,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:49,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:49,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:49,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:49,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:49,427 INFO L87 Difference]: Start difference. First operand 189 states and 264 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 03:56:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:49,574 INFO L93 Difference]: Finished difference Result 459 states and 672 transitions. [2022-11-03 03:56:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:49,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 60 [2022-11-03 03:56:49,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:49,578 INFO L225 Difference]: With dead ends: 459 [2022-11-03 03:56:49,578 INFO L226 Difference]: Without dead ends: 313 [2022-11-03 03:56:49,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:49,581 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 109 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:49,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 329 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-03 03:56:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2022-11-03 03:56:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.4451612903225806) internal successors, (448), 310 states have internal predecessors, (448), 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 03:56:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 448 transitions. [2022-11-03 03:56:49,628 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 448 transitions. Word has length 60 [2022-11-03 03:56:49,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:49,629 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 448 transitions. [2022-11-03 03:56:49,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 03:56:49,630 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 448 transitions. [2022-11-03 03:56:49,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:56:49,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:49,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:49,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:56:49,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash -300420859, now seen corresponding path program 1 times [2022-11-03 03:56:49,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:49,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536826493] [2022-11-03 03:56:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:49,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:49,753 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 03:56:49,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:49,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536826493] [2022-11-03 03:56:49,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536826493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:49,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:49,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:49,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289192170] [2022-11-03 03:56:49,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:49,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:49,757 INFO L87 Difference]: Start difference. First operand 311 states and 448 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:49,870 INFO L93 Difference]: Finished difference Result 803 states and 1190 transitions. [2022-11-03 03:56:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 03:56:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:49,880 INFO L225 Difference]: With dead ends: 803 [2022-11-03 03:56:49,880 INFO L226 Difference]: Without dead ends: 535 [2022-11-03 03:56:49,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:49,895 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 104 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:49,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 314 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-03 03:56:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 533. [2022-11-03 03:56:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.4661654135338347) internal successors, (780), 532 states have internal predecessors, (780), 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 03:56:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 780 transitions. [2022-11-03 03:56:49,999 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 780 transitions. Word has length 63 [2022-11-03 03:56:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:50,000 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 780 transitions. [2022-11-03 03:56:50,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:50,000 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 780 transitions. [2022-11-03 03:56:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:56:50,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:50,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:50,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:56:50,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1360438086, now seen corresponding path program 1 times [2022-11-03 03:56:50,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:50,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403321319] [2022-11-03 03:56:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:50,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:50,180 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 03:56:50,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:50,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403321319] [2022-11-03 03:56:50,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403321319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:50,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:50,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:50,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116403489] [2022-11-03 03:56:50,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:50,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:50,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:50,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:50,198 INFO L87 Difference]: Start difference. First operand 533 states and 780 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:50,403 INFO L93 Difference]: Finished difference Result 1425 states and 2118 transitions. [2022-11-03 03:56:50,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:50,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-03 03:56:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:50,412 INFO L225 Difference]: With dead ends: 1425 [2022-11-03 03:56:50,413 INFO L226 Difference]: Without dead ends: 935 [2022-11-03 03:56:50,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:50,425 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 99 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:50,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 299 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:50,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-11-03 03:56:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 933. [2022-11-03 03:56:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 1.4721030042918455) internal successors, (1372), 932 states have internal predecessors, (1372), 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 03:56:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1372 transitions. [2022-11-03 03:56:50,597 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1372 transitions. Word has length 66 [2022-11-03 03:56:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:50,598 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1372 transitions. [2022-11-03 03:56:50,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1372 transitions. [2022-11-03 03:56:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 03:56:50,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:50,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:50,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:56:50,600 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:50,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2011020930, now seen corresponding path program 1 times [2022-11-03 03:56:50,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:50,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043074978] [2022-11-03 03:56:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:50,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:50,719 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 03:56:50,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:50,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043074978] [2022-11-03 03:56:50,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043074978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:50,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:50,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:50,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246902558] [2022-11-03 03:56:50,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:50,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:50,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:50,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:50,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:50,725 INFO L87 Difference]: Start difference. First operand 933 states and 1372 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 03:56:51,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:51,051 INFO L93 Difference]: Finished difference Result 2537 states and 3758 transitions. [2022-11-03 03:56:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:51,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2022-11-03 03:56:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:51,060 INFO L225 Difference]: With dead ends: 2537 [2022-11-03 03:56:51,060 INFO L226 Difference]: Without dead ends: 1647 [2022-11-03 03:56:51,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:51,062 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 94 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:51,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 284 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2022-11-03 03:56:51,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1645. [2022-11-03 03:56:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 1.467153284671533) internal successors, (2412), 1644 states have internal predecessors, (2412), 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 03:56:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2412 transitions. [2022-11-03 03:56:51,320 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2412 transitions. Word has length 69 [2022-11-03 03:56:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:51,322 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 2412 transitions. [2022-11-03 03:56:51,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 03:56:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2412 transitions. [2022-11-03 03:56:51,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 03:56:51,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:51,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:51,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:56:51,331 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:51,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:51,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1281413499, now seen corresponding path program 1 times [2022-11-03 03:56:51,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:51,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583763851] [2022-11-03 03:56:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:51,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:51,424 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 03:56:51,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:51,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583763851] [2022-11-03 03:56:51,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583763851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:51,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:51,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:51,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109999055] [2022-11-03 03:56:51,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:51,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:51,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:51,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:51,428 INFO L87 Difference]: Start difference. First operand 1645 states and 2412 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:51,959 INFO L93 Difference]: Finished difference Result 4497 states and 6606 transitions. [2022-11-03 03:56:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:51,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-03 03:56:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:51,971 INFO L225 Difference]: With dead ends: 4497 [2022-11-03 03:56:51,971 INFO L226 Difference]: Without dead ends: 2895 [2022-11-03 03:56:51,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:51,976 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 89 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:51,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 269 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:51,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2022-11-03 03:56:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2893. [2022-11-03 03:56:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2892 states have (on average 1.4536652835408022) internal successors, (4204), 2892 states have internal predecessors, (4204), 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 03:56:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 4204 transitions. [2022-11-03 03:56:52,391 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 4204 transitions. Word has length 72 [2022-11-03 03:56:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:52,392 INFO L495 AbstractCegarLoop]: Abstraction has 2893 states and 4204 transitions. [2022-11-03 03:56:52,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 4204 transitions. [2022-11-03 03:56:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 03:56:52,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:52,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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 03:56:52,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:56:52,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash 309618100, now seen corresponding path program 1 times [2022-11-03 03:56:52,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:52,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599056801] [2022-11-03 03:56:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:52,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:52,774 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 03:56:52,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:52,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599056801] [2022-11-03 03:56:52,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599056801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:52,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:52,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:56:52,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381676497] [2022-11-03 03:56:52,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:52,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:56:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:56:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:52,778 INFO L87 Difference]: Start difference. First operand 2893 states and 4204 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:55,897 INFO L93 Difference]: Finished difference Result 17273 states and 25010 transitions. [2022-11-03 03:56:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-03 03:56:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:55,958 INFO L225 Difference]: With dead ends: 17273 [2022-11-03 03:56:55,959 INFO L226 Difference]: Without dead ends: 14423 [2022-11-03 03:56:55,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:55,969 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 689 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:55,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 971 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:56:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14423 states. [2022-11-03 03:56:58,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14423 to 14413. [2022-11-03 03:56:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14413 states, 14412 states have (on average 1.4440743824590618) internal successors, (20812), 14412 states have internal predecessors, (20812), 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 03:56:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 20812 transitions. [2022-11-03 03:56:58,687 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 20812 transitions. Word has length 75 [2022-11-03 03:56:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:58,688 INFO L495 AbstractCegarLoop]: Abstraction has 14413 states and 20812 transitions. [2022-11-03 03:56:58,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 20812 transitions. [2022-11-03 03:56:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:56:58,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:58,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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 03:56:58,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:56:58,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1420828021, now seen corresponding path program 1 times [2022-11-03 03:56:58,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:58,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764102776] [2022-11-03 03:56:58,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:58,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:58,908 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 03:56:58,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:58,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764102776] [2022-11-03 03:56:58,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764102776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:58,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:58,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:58,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677905117] [2022-11-03 03:56:58,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:58,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:58,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:58,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:58,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:58,911 INFO L87 Difference]: Start difference. First operand 14413 states and 20812 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 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 03:57:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:03,721 INFO L93 Difference]: Finished difference Result 36894 states and 53486 transitions. [2022-11-03 03:57:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:57:03,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 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 77 [2022-11-03 03:57:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:03,788 INFO L225 Difference]: With dead ends: 36894 [2022-11-03 03:57:03,788 INFO L226 Difference]: Without dead ends: 22524 [2022-11-03 03:57:03,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:57:03,807 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 626 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:03,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 163 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:57:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22524 states. [2022-11-03 03:57:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22524 to 22522. [2022-11-03 03:57:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22522 states, 22521 states have (on average 1.4384796412237468) internal successors, (32396), 22521 states have internal predecessors, (32396), 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 03:57:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22522 states to 22522 states and 32396 transitions. [2022-11-03 03:57:08,859 INFO L78 Accepts]: Start accepts. Automaton has 22522 states and 32396 transitions. Word has length 77 [2022-11-03 03:57:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:08,859 INFO L495 AbstractCegarLoop]: Abstraction has 22522 states and 32396 transitions. [2022-11-03 03:57:08,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 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 03:57:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 22522 states and 32396 transitions. [2022-11-03 03:57:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 03:57:08,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:08,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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 03:57:08,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:57:08,862 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:08,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:08,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1285066810, now seen corresponding path program 1 times [2022-11-03 03:57:08,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:08,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635262214] [2022-11-03 03:57:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:08,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:09,413 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 03:57:09,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:09,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635262214] [2022-11-03 03:57:09,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635262214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:09,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:09,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 03:57:09,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538306295] [2022-11-03 03:57:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:57:09,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:57:09,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:57:09,417 INFO L87 Difference]: Start difference. First operand 22522 states and 32396 transitions. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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 03:57:18,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:18,914 INFO L93 Difference]: Finished difference Result 47456 states and 68789 transitions. [2022-11-03 03:57:18,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:57:18,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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 77 [2022-11-03 03:57:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:19,062 INFO L225 Difference]: With dead ends: 47456 [2022-11-03 03:57:19,062 INFO L226 Difference]: Without dead ends: 47454 [2022-11-03 03:57:19,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:57:19,078 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 1806 mSDsluCounter, 2850 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:19,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1806 Valid, 3351 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:57:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47454 states. [2022-11-03 03:57:24,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47454 to 23041. [2022-11-03 03:57:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23041 states, 23040 states have (on average 1.4389756944444445) internal successors, (33154), 23040 states have internal predecessors, (33154), 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 03:57:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23041 states to 23041 states and 33154 transitions. [2022-11-03 03:57:24,444 INFO L78 Accepts]: Start accepts. Automaton has 23041 states and 33154 transitions. Word has length 77 [2022-11-03 03:57:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:24,444 INFO L495 AbstractCegarLoop]: Abstraction has 23041 states and 33154 transitions. [2022-11-03 03:57:24,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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 03:57:24,445 INFO L276 IsEmpty]: Start isEmpty. Operand 23041 states and 33154 transitions. [2022-11-03 03:57:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 03:57:24,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:24,448 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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 03:57:24,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:57:24,449 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1852510427, now seen corresponding path program 1 times [2022-11-03 03:57:24,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:24,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096153383] [2022-11-03 03:57:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:24,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:26,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:26,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096153383] [2022-11-03 03:57:26,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096153383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:26,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570526074] [2022-11-03 03:57:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:26,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:26,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:26,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:26,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d8052f1-19f2-4a3d-abc4-8a43f5af98f9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:57:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 03:57:26,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:31,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:53,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570526074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:53,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127794553] [2022-11-03 03:58:53,774 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-11-03 03:58:53,775 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:53,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:53,787 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:53,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:54,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:58:54,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2022-11-03 03:58:54,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:54,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:54,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:54,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:54,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:58:54,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2022-11-03 03:59:44,400 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:01:11,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '288911#(and (<= 0 ~id6~0) (<= 0 ~send5~0) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~nomsg~0 ~p4_new~0) (= ~p4~0 0) (<= 0 ~mode1~0) (<= 0 ~mode4~0) (<= 0 ~send4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~__return_104949~0 1) (<= 0 ~id5~0) (= |ULTIMATE.start_main_~check__tmp~0#1| ~__return_105135~0) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 ~mode6~0) (= ~nomsg~0 ~p5_new~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (= ~p2~0 0) (= ~p5~0 0) (<= ~st6~0 0) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (<= 0 ~mode3~0) (<= (+ ~p6_old~0 1) 0) (<= ~send1~0 127) (<= ~st1~0 0) (<= 0 (+ ~p5_old~0 1)) (<= ~st5~0 0) (= ~p3_new~0 ~nomsg~0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= ~mode2~0 1) (<= (+ ~p5_old~0 1) 0) (<= ~mode5~0 1) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= ~id6~0 127) (<= ~id5~0 127) (<= 0 ~st2~0) (<= ~mode3~0 1) (<= 0 ~send2~0) (<= 0 ~st5~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (= ~p6~0 0) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (= ~nomsg~0 ~p2_new~0) (or (and (not (< (mod ~r1~0 256) 6)) (not (= (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0 ~st6~0) 1))) (not (<= (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0 ~st6~0) 1))) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= (+ |ULTIMATE.start_main_~node5__m5~0#1| 1) 0) (<= ~mode6~0 1) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= ~nomsg~0 ~p6_new~0) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~st2~0 0) (<= (+ |ULTIMATE.start_main_~node6__m6~0#1| 1) 0) (<= ~st4~0 0) (<= 0 (+ |ULTIMATE.start_main_~node5__m5~0#1| 1)) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 0 ~id4~0) (<= ~id3~0 127) (<= 1 ~__return_104949~0) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (= ~__return_105135~0 |ULTIMATE.start_main_~main__c1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~node6__m6~0#1| 1)) (<= ~send5~0 127) (<= 0 ~send6~0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= 0 (+ ~p6_old~0 1)) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 ~mode5~0) (<= 0 ~st6~0) (<= ~send6~0 127) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-11-03 04:01:11,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:01:11,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:01:11,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 59 [2022-11-03 04:01:11,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291351547] [2022-11-03 04:01:11,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:11,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-03 04:01:11,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:11,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-03 04:01:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2616, Invalid=14676, Unknown=0, NotChecked=0, Total=17292 [2022-11-03 04:01:11,007 INFO L87 Difference]: Start difference. First operand 23041 states and 33154 transitions. Second operand has 59 states, 59 states have (on average 4.576271186440678) internal successors, (270), 59 states have internal predecessors, (270), 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)